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 0.1.23-133090d [2018-10-04 09:13:27,341 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 09:13:27,343 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 09:13:27,357 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 09:13:27,358 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 09:13:27,359 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 09:13:27,360 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 09:13:27,362 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 09:13:27,363 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 09:13:27,364 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 09:13:27,365 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 09:13:27,365 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 09:13:27,366 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 09:13:27,367 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 09:13:27,368 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 09:13:27,369 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 09:13:27,370 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 09:13:27,372 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 09:13:27,374 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 09:13:27,375 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 09:13:27,377 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 09:13:27,378 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 09:13:27,380 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-04 09:13:27,389 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 [2018-10-04 09:13:27,411 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 09:13:27,412 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 09:13:27,413 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 09:13:27,414 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 09:13:27,414 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 09:13:27,414 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 09:13:27,415 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 09:13:27,416 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 09:13:27,416 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 09:13:27,416 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 09:13:27,416 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 09:13:27,416 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 09:13:27,417 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 09:13:27,417 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 09:13:27,417 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 09:13:27,417 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 09:13:27,417 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 09:13:27,418 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 09:13:27,419 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 09:13:27,419 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 09:13:27,420 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 09:13:27,420 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 09:13:27,420 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:13:27,420 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 09:13:27,420 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 09:13:27,421 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 09:13:27,421 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 09:13:27,421 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 09:13:27,421 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 09:13:27,421 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 09:13:27,472 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 09:13:27,485 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 09:13:27,489 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 09:13:27,491 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 09:13:27,491 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 09:13:27,492 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array1.i_3.bpl [2018-10-04 09:13:27,492 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array1.i_3.bpl' [2018-10-04 09:13:27,537 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 09:13:27,539 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 09:13:27,539 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 09:13:27,540 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 09:13:27,540 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 09:13:27,559 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 04.10 09:13:27" (1/1) ... [2018-10-04 09:13:27,573 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 04.10 09:13:27" (1/1) ... [2018-10-04 09:13:27,580 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 09:13:27,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 09:13:27,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 09:13:27,582 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 09:13:27,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:13:27" (1/1) ... [2018-10-04 09:13:27,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:13:27" (1/1) ... [2018-10-04 09:13:27,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:13:27" (1/1) ... [2018-10-04 09:13:27,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:13:27" (1/1) ... [2018-10-04 09:13:27,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:13:27" (1/1) ... [2018-10-04 09:13:27,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:13:27" (1/1) ... [2018-10-04 09:13:27,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:13:27" (1/1) ... [2018-10-04 09:13:27,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 09:13:27,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 09:13:27,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 09:13:27,600 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 09:13:27,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:13:27" (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 [2018-10-04 09:13:27,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 09:13:27,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 09:13:27,878 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 09:13:27,878 INFO L202 PluginConnector]: Adding new model array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:13:27 BoogieIcfgContainer [2018-10-04 09:13:27,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 09:13:27,880 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 09:13:27,880 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 09:13:27,883 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 09:13:27,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:13:27" (1/2) ... [2018-10-04 09:13:27,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e5e823e and model type array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 09:13:27, skipping insertion in model container [2018-10-04 09:13:27,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:13:27" (2/2) ... [2018-10-04 09:13:27,887 INFO L112 eAbstractionObserver]: Analyzing ICFG array1.i_3.bpl [2018-10-04 09:13:27,897 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 09:13:27,904 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 09:13:27,948 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 09:13:27,948 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 09:13:27,949 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 09:13:27,949 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 09:13:27,949 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 09:13:27,949 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 09:13:27,949 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 09:13:27,950 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 09:13:27,950 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 09:13:27,962 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-04 09:13:27,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 09:13:27,968 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:27,969 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 09:13:27,970 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:27,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:27,977 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-04 09:13:27,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:27,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:28,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:28,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:28,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:28,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:28,118 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:13:28,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 09:13:28,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:13:28,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:13:28,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:13:28,139 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-04 09:13:28,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:28,186 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-04 09:13:28,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:13:28,188 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-04 09:13:28,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:28,199 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:13:28,199 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 09:13:28,204 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 [2018-10-04 09:13:28,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 09:13:28,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 09:13:28,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 09:13:28,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 09:13:28,238 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-04 09:13:28,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:28,239 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 09:13:28,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:13:28,239 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 09:13:28,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 09:13:28,240 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:28,240 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-04 09:13:28,240 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:28,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:28,240 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-04 09:13:28,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:28,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:28,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:28,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:28,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:28,381 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:28,381 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:13:28,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:28,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:28,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:28,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 09:13:28,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 09:13:28,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 09:13:28,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:13:28,501 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-10-04 09:13:28,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:28,589 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 09:13:28,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:13:28,590 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 09:13:28,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:28,590 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:13:28,591 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 09:13:28,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:13:28,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 09:13:28,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 09:13:28,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 09:13:28,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 09:13:28,597 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-04 09:13:28,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:28,597 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 09:13:28,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 09:13:28,598 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 09:13:28,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 09:13:28,598 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:28,598 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-04 09:13:28,599 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:28,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:28,599 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-10-04 09:13:28,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:28,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:28,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:28,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:28,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:28,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:28,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:28,768 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 [2018-10-04 09:13:28,780 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:13:28,804 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:13:28,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:28,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:28,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:28,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 09:13:28,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 09:13:28,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 09:13:28,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:13:28,847 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-10-04 09:13:28,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:28,913 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 09:13:28,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:13:28,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 09:13:28,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:28,914 INFO L225 Difference]: With dead ends: 13 [2018-10-04 09:13:28,915 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 09:13:28,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:13:28,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 09:13:28,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 09:13:28,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 09:13:28,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 09:13:28,919 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-04 09:13:28,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:28,920 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 09:13:28,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 09:13:28,920 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 09:13:28,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 09:13:28,920 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:28,921 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-04 09:13:28,921 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:28,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:28,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-10-04 09:13:28,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:28,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:28,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:28,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:28,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:28,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:29,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:29,047 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 [2018-10-04 09:13:29,055 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:13:29,076 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 09:13:29,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:29,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:29,104 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:29,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 09:13:29,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:13:29,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:13:29,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:13:29,105 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-10-04 09:13:29,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:29,172 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 09:13:29,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:13:29,173 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-04 09:13:29,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:29,174 INFO L225 Difference]: With dead ends: 15 [2018-10-04 09:13:29,174 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 09:13:29,175 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 [2018-10-04 09:13:29,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 09:13:29,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 09:13:29,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 09:13:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 09:13:29,181 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-04 09:13:29,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:29,182 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 09:13:29,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:13:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 09:13:29,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 09:13:29,183 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:29,183 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-04 09:13:29,183 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:29,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:29,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-10-04 09:13:29,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:29,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:29,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:29,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:29,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:29,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:29,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:29,509 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:13:29,525 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:13:29,560 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:13:29,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:29,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:29,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:29,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:13:29,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:13:29,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:13:29,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:13:29,597 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-10-04 09:13:29,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:29,656 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 09:13:29,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:13:29,659 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-04 09:13:29,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:29,660 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:13:29,661 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 09:13:29,662 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 [2018-10-04 09:13:29,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 09:13:29,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 09:13:29,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 09:13:29,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 09:13:29,668 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-04 09:13:29,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:29,668 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 09:13:29,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:13:29,668 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 09:13:29,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 09:13:29,669 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:29,669 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-04 09:13:29,670 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:29,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:29,670 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-10-04 09:13:29,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:29,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:29,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:29,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:29,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:29,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:29,789 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:13:29,797 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:13:29,844 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 09:13:29,844 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:29,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:29,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:29,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:13:29,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:13:29,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:13:29,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:13:29,878 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-10-04 09:13:29,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:29,912 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 09:13:29,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:13:29,913 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-04 09:13:29,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:29,914 INFO L225 Difference]: With dead ends: 19 [2018-10-04 09:13:29,914 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 09:13:29,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:13:29,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 09:13:29,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 09:13:29,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 09:13:29,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 09:13:29,919 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-04 09:13:29,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:29,920 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 09:13:29,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:13:29,920 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 09:13:29,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 09:13:29,921 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:29,921 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-04 09:13:29,921 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:29,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:29,922 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-10-04 09:13:29,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:29,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:29,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:29,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:29,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:30,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:30,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:13:30,142 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:13:30,157 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:13:30,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:30,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:30,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:30,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:13:30,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:13:30,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:13:30,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:13:30,195 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-10-04 09:13:30,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:30,228 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 09:13:30,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:13:30,229 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-04 09:13:30,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:30,230 INFO L225 Difference]: With dead ends: 21 [2018-10-04 09:13:30,230 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 09:13:30,230 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 [2018-10-04 09:13:30,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 09:13:30,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 09:13:30,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 09:13:30,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 09:13:30,234 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-04 09:13:30,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:30,235 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 09:13:30,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:13:30,235 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 09:13:30,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 09:13:30,236 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:30,236 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-04 09:13:30,236 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:30,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:30,236 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-10-04 09:13:30,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:30,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:30,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:30,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:30,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:30,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:30,520 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 [2018-10-04 09:13:30,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:30,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:30,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:30,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:13:30,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:13:30,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:13:30,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:13:30,633 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-10-04 09:13:30,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:30,772 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 09:13:30,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:13:30,773 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-04 09:13:30,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:30,774 INFO L225 Difference]: With dead ends: 23 [2018-10-04 09:13:30,774 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 09:13:30,775 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 [2018-10-04 09:13:30,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 09:13:30,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 09:13:30,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 09:13:30,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 09:13:30,780 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-04 09:13:30,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:30,780 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 09:13:30,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:13:30,780 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 09:13:30,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 09:13:30,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:30,781 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-04 09:13:30,782 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:30,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:30,782 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-10-04 09:13:30,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:30,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:30,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:30,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:30,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:31,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:31,058 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) [2018-10-04 09:13:31,074 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:31,090 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:13:31,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:31,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:31,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:31,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:13:31,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:13:31,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:13:31,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:13:31,129 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-10-04 09:13:31,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:31,186 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 09:13:31,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:13:31,187 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-04 09:13:31,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:31,188 INFO L225 Difference]: With dead ends: 25 [2018-10-04 09:13:31,189 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 09:13:31,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:13:31,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 09:13:31,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 09:13:31,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 09:13:31,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 09:13:31,194 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-04 09:13:31,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:31,195 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 09:13:31,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:13:31,195 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 09:13:31,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 09:13:31,196 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:31,196 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-04 09:13:31,196 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:31,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:31,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-10-04 09:13:31,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:31,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:31,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:31,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:31,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:31,388 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:31,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:31,389 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 [2018-10-04 09:13:31,399 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:13:31,423 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-04 09:13:31,423 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:31,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:31,434 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:31,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:31,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 09:13:31,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 09:13:31,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 09:13:31,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:13:31,457 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-10-04 09:13:31,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:31,504 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 09:13:31,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 09:13:31,505 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-04 09:13:31,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:31,506 INFO L225 Difference]: With dead ends: 27 [2018-10-04 09:13:31,506 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 09:13:31,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:13:31,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 09:13:31,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 09:13:31,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 09:13:31,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 09:13:31,511 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-10-04 09:13:31,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:31,512 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 09:13:31,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 09:13:31,512 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 09:13:31,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 09:13:31,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:31,513 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-10-04 09:13:31,513 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:31,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:31,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-10-04 09:13:31,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:31,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:31,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:31,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:31,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:31,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:31,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:13:31,797 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:13:31,811 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:13:31,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:31,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:31,823 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:31,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:31,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 09:13:31,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 09:13:31,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 09:13:31,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 09:13:31,848 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-10-04 09:13:31,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:31,917 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 09:13:31,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 09:13:31,917 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-04 09:13:31,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:31,918 INFO L225 Difference]: With dead ends: 29 [2018-10-04 09:13:31,918 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 09:13:31,919 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 [2018-10-04 09:13:31,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 09:13:31,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 09:13:31,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 09:13:31,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 09:13:31,924 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-10-04 09:13:31,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:31,924 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 09:13:31,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 09:13:31,925 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 09:13:31,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 09:13:31,925 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:31,926 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-04 09:13:31,926 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:31,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:31,926 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-10-04 09:13:31,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:31,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:31,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:31,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:31,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:32,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:32,131 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 [2018-10-04 09:13:32,138 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:13:32,163 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 09:13:32,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:32,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:32,182 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:32,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:32,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 09:13:32,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:13:32,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:13:32,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:13:32,213 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-10-04 09:13:32,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:32,408 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 09:13:32,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 09:13:32,410 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-04 09:13:32,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:32,411 INFO L225 Difference]: With dead ends: 31 [2018-10-04 09:13:32,411 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 09:13:32,412 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 [2018-10-04 09:13:32,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 09:13:32,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 09:13:32,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 09:13:32,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 09:13:32,418 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-10-04 09:13:32,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:32,419 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 09:13:32,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:13:32,419 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 09:13:32,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 09:13:32,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:32,421 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-10-04 09:13:32,421 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:32,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:32,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-10-04 09:13:32,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:32,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:32,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:32,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:32,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:32,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:32,712 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:32,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:32,713 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 [2018-10-04 09:13:32,722 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:13:32,747 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 09:13:32,747 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:32,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:32,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:32,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 09:13:32,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 09:13:32,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 09:13:32,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 09:13:32,784 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-10-04 09:13:32,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:32,831 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 09:13:32,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 09:13:32,831 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-04 09:13:32,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:32,832 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:13:32,832 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 09:13:32,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 09:13:32,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 09:13:32,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 09:13:32,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 09:13:32,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 09:13:32,838 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-10-04 09:13:32,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:32,838 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 09:13:32,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 09:13:32,839 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 09:13:32,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 09:13:32,839 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:32,840 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-04 09:13:32,840 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:32,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:32,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-10-04 09:13:32,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:32,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:32,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:32,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:32,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:32,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:33,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:33,332 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 [2018-10-04 09:13:33,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:33,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:33,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:33,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:33,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 09:13:33,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 09:13:33,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 09:13:33,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:13:33,400 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-10-04 09:13:33,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:33,441 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 09:13:33,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 09:13:33,441 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-04 09:13:33,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:33,442 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:13:33,442 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 09:13:33,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:13:33,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 09:13:33,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 09:13:33,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 09:13:33,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 09:13:33,448 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-10-04 09:13:33,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:33,449 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 09:13:33,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 09:13:33,449 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 09:13:33,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 09:13:33,450 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:33,450 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-10-04 09:13:33,450 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:33,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:33,451 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-10-04 09:13:33,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:33,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:33,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:33,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:33,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:33,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:33,678 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 [2018-10-04 09:13:33,707 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:13:33,732 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:13:33,732 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:33,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:33,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:33,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 09:13:33,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 09:13:33,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 09:13:33,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:13:33,773 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-10-04 09:13:33,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:33,812 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 09:13:33,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 09:13:33,812 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-04 09:13:33,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:33,812 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:13:33,813 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:13:33,813 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 [2018-10-04 09:13:33,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:13:33,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 09:13:33,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 09:13:33,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 09:13:33,817 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-10-04 09:13:33,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:33,817 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 09:13:33,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 09:13:33,817 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 09:13:33,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 09:13:33,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:33,818 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-04 09:13:33,819 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:33,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:33,819 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-10-04 09:13:33,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:33,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:33,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:33,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:33,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:34,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:34,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:13:34,021 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:13:34,222 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-04 09:13:34,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:34,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:34,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:34,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 09:13:34,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 09:13:34,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 09:13:34,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:13:34,292 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-10-04 09:13:34,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:34,466 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 09:13:34,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 09:13:34,468 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-04 09:13:34,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:34,468 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:13:34,469 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:13:34,469 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 [2018-10-04 09:13:34,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:13:34,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 09:13:34,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 09:13:34,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-04 09:13:34,474 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-10-04 09:13:34,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:34,474 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-04 09:13:34,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 09:13:34,475 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-04 09:13:34,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 09:13:34,475 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:34,476 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-10-04 09:13:34,476 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:34,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:34,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-10-04 09:13:34,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:34,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:34,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:34,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:34,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:34,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:34,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:13:34,952 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:13:34,966 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:13:34,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:34,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:35,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:35,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 09:13:35,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 09:13:35,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 09:13:35,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 09:13:35,005 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-10-04 09:13:35,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:35,053 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 09:13:35,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 09:13:35,053 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-04 09:13:35,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:35,054 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:13:35,054 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:13:35,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 09:13:35,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:13:35,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 09:13:35,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 09:13:35,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 09:13:35,061 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-10-04 09:13:35,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:35,061 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 09:13:35,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 09:13:35,061 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 09:13:35,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 09:13:35,062 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:35,062 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-10-04 09:13:35,062 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:35,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:35,063 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-10-04 09:13:35,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:35,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:35,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:35,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:35,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:35,563 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:35,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:35,563 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 [2018-10-04 09:13:35,571 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:13:35,627 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-04 09:13:35,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:35,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:35,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:35,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 09:13:35,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:13:35,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:13:35,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:13:35,666 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-10-04 09:13:35,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:35,910 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 09:13:35,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 09:13:35,911 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-04 09:13:35,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:35,911 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:13:35,912 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:13:35,912 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 [2018-10-04 09:13:35,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:13:35,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 09:13:35,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 09:13:35,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-04 09:13:35,917 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-10-04 09:13:35,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:35,917 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-04 09:13:35,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:13:35,917 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-04 09:13:35,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 09:13:35,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:35,918 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-10-04 09:13:35,919 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:35,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:35,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-10-04 09:13:35,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:35,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:35,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:35,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:35,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:35,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:36,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:36,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:13:36,267 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:13:36,306 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 09:13:36,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:36,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:36,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:36,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 09:13:36,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 09:13:36,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 09:13:36,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 09:13:36,345 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-10-04 09:13:36,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:36,414 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 09:13:36,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 09:13:36,414 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-04 09:13:36,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:36,415 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:13:36,415 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:13:36,415 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 [2018-10-04 09:13:36,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:13:36,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 09:13:36,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 09:13:36,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-04 09:13:36,420 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-10-04 09:13:36,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:36,420 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-04 09:13:36,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 09:13:36,421 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-04 09:13:36,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 09:13:36,422 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:36,422 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-10-04 09:13:36,422 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:36,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:36,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-10-04 09:13:36,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:36,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:36,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:36,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:36,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:36,688 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:36,688 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 [2018-10-04 09:13:36,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:36,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:36,726 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:36,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:36,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 09:13:36,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 09:13:36,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 09:13:36,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:13:36,757 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-10-04 09:13:36,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:36,836 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-04 09:13:36,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 09:13:36,837 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-04 09:13:36,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:36,837 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:13:36,837 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:13:36,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:13:36,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:13:36,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 09:13:36,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 09:13:36,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-04 09:13:36,844 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-10-04 09:13:36,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:36,844 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-04 09:13:36,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 09:13:36,844 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-04 09:13:36,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 09:13:36,845 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:36,845 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-10-04 09:13:36,845 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:36,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:36,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-10-04 09:13:36,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:36,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:36,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:36,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:36,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:37,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:37,853 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 [2018-10-04 09:13:37,868 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:13:37,888 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:13:37,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:37,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:37,901 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:37,922 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:37,922 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 09:13:37,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 09:13:37,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 09:13:37,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:13:37,923 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-10-04 09:13:37,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:37,984 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 09:13:37,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 09:13:37,985 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-04 09:13:37,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:37,986 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:13:37,986 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:13:37,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:13:37,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:13:37,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 09:13:37,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 09:13:37,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-04 09:13:37,991 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-10-04 09:13:37,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:37,992 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-04 09:13:37,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 09:13:37,992 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-04 09:13:37,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 09:13:37,992 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:37,993 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-10-04 09:13:37,993 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:37,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:37,993 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-10-04 09:13:37,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:37,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:37,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:37,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:37,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:38,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:38,681 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 [2018-10-04 09:13:38,688 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:13:38,767 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-04 09:13:38,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:38,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:38,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:38,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 09:13:38,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 09:13:38,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 09:13:38,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:13:38,806 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-10-04 09:13:39,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:39,008 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-04 09:13:39,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 09:13:39,011 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-04 09:13:39,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:39,012 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:13:39,013 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:13:39,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:13:39,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:13:39,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 09:13:39,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 09:13:39,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-04 09:13:39,016 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-10-04 09:13:39,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:39,017 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-04 09:13:39,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 09:13:39,017 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-04 09:13:39,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 09:13:39,018 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:39,018 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-10-04 09:13:39,018 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:39,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:39,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-10-04 09:13:39,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:39,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:39,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:39,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:39,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:39,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:39,554 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 [2018-10-04 09:13:39,564 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:13:39,586 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:13:39,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:39,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:39,603 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:39,631 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:39,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 09:13:39,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 09:13:39,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 09:13:39,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 09:13:39,632 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-10-04 09:13:39,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:39,699 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 09:13:39,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 09:13:39,700 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-04 09:13:39,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:39,700 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:13:39,701 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:13:39,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 09:13:39,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:13:39,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 09:13:39,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 09:13:39,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-04 09:13:39,706 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-10-04 09:13:39,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:39,707 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-04 09:13:39,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 09:13:39,707 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-04 09:13:39,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 09:13:39,708 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:39,708 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-10-04 09:13:39,708 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:39,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:39,708 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-10-04 09:13:39,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:39,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:39,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:39,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:39,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:40,732 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:40,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:40,732 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 [2018-10-04 09:13:40,745 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:13:40,833 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-04 09:13:40,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:40,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:40,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:40,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 09:13:40,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 09:13:40,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 09:13:40,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:13:40,886 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-10-04 09:13:41,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:41,143 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-04 09:13:41,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 09:13:41,144 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-04 09:13:41,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:41,145 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:13:41,145 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:13:41,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:13:41,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:13:41,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 09:13:41,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 09:13:41,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-04 09:13:41,151 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-10-04 09:13:41,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:41,152 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-04 09:13:41,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 09:13:41,152 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-04 09:13:41,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 09:13:41,152 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:41,152 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-10-04 09:13:41,152 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:41,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:41,153 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-10-04 09:13:41,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:41,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:41,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:41,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:41,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:42,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:42,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:13:42,014 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:13:42,072 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 09:13:42,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:42,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:42,110 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:42,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 09:13:42,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 09:13:42,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 09:13:42,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 09:13:42,111 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-10-04 09:13:42,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:42,168 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 09:13:42,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 09:13:42,168 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-04 09:13:42,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:42,169 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:13:42,169 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:13:42,170 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 [2018-10-04 09:13:42,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:13:42,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 09:13:42,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 09:13:42,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-04 09:13:42,176 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-10-04 09:13:42,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:42,176 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-04 09:13:42,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 09:13:42,177 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-04 09:13:42,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 09:13:42,177 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:42,177 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-10-04 09:13:42,177 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:42,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:42,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-10-04 09:13:42,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:42,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:42,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:42,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:42,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:42,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:42,909 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 [2018-10-04 09:13:42,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:42,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:42,992 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:42,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 09:13:42,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 09:13:42,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 09:13:42,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:13:42,993 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-10-04 09:13:43,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:43,046 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-04 09:13:43,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 09:13:43,046 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-04 09:13:43,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:43,047 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:13:43,047 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 09:13:43,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:13:43,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 09:13:43,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 09:13:43,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 09:13:43,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-04 09:13:43,050 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-10-04 09:13:43,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:43,051 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-04 09:13:43,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 09:13:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-04 09:13:43,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 09:13:43,051 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:43,051 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-10-04 09:13:43,052 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:43,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:43,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-10-04 09:13:43,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:43,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:43,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:43,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:43,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:44,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:44,572 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) [2018-10-04 09:13:44,587 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:44,613 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:13:44,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:44,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:44,654 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:44,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 09:13:44,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 09:13:44,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 09:13:44,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:13:44,656 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-10-04 09:13:44,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:44,732 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 09:13:44,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 09:13:44,732 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-04 09:13:44,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:44,733 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:13:44,733 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:13:44,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:13:44,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:13:44,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 09:13:44,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 09:13:44,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-04 09:13:44,737 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-10-04 09:13:44,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:44,738 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-04 09:13:44,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 09:13:44,738 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-04 09:13:44,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 09:13:44,738 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:44,738 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-10-04 09:13:44,739 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:44,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:44,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-10-04 09:13:44,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:44,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:44,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:44,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:44,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:45,171 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:45,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:45,171 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 [2018-10-04 09:13:45,179 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:13:45,252 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-04 09:13:45,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:45,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:45,268 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:45,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:45,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 09:13:45,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 09:13:45,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 09:13:45,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:13:45,297 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-10-04 09:13:45,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:45,352 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-04 09:13:45,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 09:13:45,352 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-04 09:13:45,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:45,353 INFO L225 Difference]: With dead ends: 63 [2018-10-04 09:13:45,353 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 09:13:45,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:13:45,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 09:13:45,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 09:13:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 09:13:45,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-04 09:13:45,358 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-10-04 09:13:45,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:45,358 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-04 09:13:45,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 09:13:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-04 09:13:45,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 09:13:45,359 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:45,359 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-10-04 09:13:45,360 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:45,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:45,360 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-10-04 09:13:45,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:45,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:45,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:45,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:45,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:46,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:46,186 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 [2018-10-04 09:13:46,203 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:13:46,233 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:13:46,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:46,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:46,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:46,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 09:13:46,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 09:13:46,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 09:13:46,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 09:13:46,276 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-10-04 09:13:46,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:46,372 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-04 09:13:46,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 09:13:46,372 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-04 09:13:46,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:46,374 INFO L225 Difference]: With dead ends: 65 [2018-10-04 09:13:46,374 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 09:13:46,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 09:13:46,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 09:13:46,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 09:13:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 09:13:46,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-04 09:13:46,377 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-10-04 09:13:46,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:46,378 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-04 09:13:46,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 09:13:46,378 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-04 09:13:46,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 09:13:46,378 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:46,378 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-10-04 09:13:46,379 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:46,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:46,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-10-04 09:13:46,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:46,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:46,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:46,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:46,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:46,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:46,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:46,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:13:47,018 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:13:47,180 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-04 09:13:47,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:47,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:47,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:47,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 09:13:47,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 09:13:47,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 09:13:47,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:13:47,216 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-10-04 09:13:47,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:47,282 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-04 09:13:47,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 09:13:47,283 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-04 09:13:47,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:47,284 INFO L225 Difference]: With dead ends: 67 [2018-10-04 09:13:47,284 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 09:13:47,285 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 [2018-10-04 09:13:47,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 09:13:47,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 09:13:47,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 09:13:47,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-04 09:13:47,288 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-10-04 09:13:47,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:47,288 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-04 09:13:47,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 09:13:47,288 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-04 09:13:47,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 09:13:47,288 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:47,289 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-10-04 09:13:47,289 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:47,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:47,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-10-04 09:13:47,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:47,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:47,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:47,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:47,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:47,987 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:47,987 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 [2018-10-04 09:13:47,995 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:13:48,086 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 09:13:48,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:48,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:48,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:48,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 09:13:48,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 09:13:48,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 09:13:48,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 09:13:48,123 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-10-04 09:13:48,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:48,318 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-04 09:13:48,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 09:13:48,318 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-04 09:13:48,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:48,319 INFO L225 Difference]: With dead ends: 69 [2018-10-04 09:13:48,319 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 09:13:48,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 09:13:48,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 09:13:48,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 09:13:48,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 09:13:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-04 09:13:48,326 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-10-04 09:13:48,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:48,327 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-04 09:13:48,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 09:13:48,327 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-04 09:13:48,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 09:13:48,327 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:48,328 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-10-04 09:13:48,328 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:48,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:48,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-10-04 09:13:48,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:48,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:48,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:48,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:48,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:49,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:49,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:13:49,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:49,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:49,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:49,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:49,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 09:13:49,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 09:13:49,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 09:13:49,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:13:49,111 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-10-04 09:13:49,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:49,170 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-04 09:13:49,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 09:13:49,171 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-04 09:13:49,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:49,172 INFO L225 Difference]: With dead ends: 71 [2018-10-04 09:13:49,172 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 09:13:49,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:13:49,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 09:13:49,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 09:13:49,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 09:13:49,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-04 09:13:49,176 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-10-04 09:13:49,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:49,176 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-04 09:13:49,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 09:13:49,176 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-04 09:13:49,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 09:13:49,176 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:49,176 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-10-04 09:13:49,177 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:49,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:49,177 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-10-04 09:13:49,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:49,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:49,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:49,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:49,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:49,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:49,684 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 [2018-10-04 09:13:49,691 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:13:49,716 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:13:49,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:49,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:49,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:49,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 09:13:49,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 09:13:49,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 09:13:49,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 09:13:49,761 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-10-04 09:13:49,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:49,816 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-04 09:13:49,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 09:13:49,817 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-04 09:13:49,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:49,818 INFO L225 Difference]: With dead ends: 73 [2018-10-04 09:13:49,818 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 09:13:49,819 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 [2018-10-04 09:13:49,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 09:13:49,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-04 09:13:49,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 09:13:49,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-04 09:13:49,822 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-10-04 09:13:49,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:49,823 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-04 09:13:49,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 09:13:49,823 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-04 09:13:49,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 09:13:49,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:49,824 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-10-04 09:13:49,824 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:49,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:49,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-10-04 09:13:49,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:49,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:49,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:49,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:49,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:50,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:50,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:50,443 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 [2018-10-04 09:13:50,451 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:13:50,563 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-04 09:13:50,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:50,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:50,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:50,597 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:50,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 09:13:50,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 09:13:50,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 09:13:50,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 09:13:50,598 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-10-04 09:13:50,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:50,680 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-04 09:13:50,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 09:13:50,680 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-04 09:13:50,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:50,681 INFO L225 Difference]: With dead ends: 75 [2018-10-04 09:13:50,681 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 09:13:50,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 09:13:50,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 09:13:50,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 09:13:50,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 09:13:50,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-04 09:13:50,685 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-10-04 09:13:50,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:50,685 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-04 09:13:50,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 09:13:50,686 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-04 09:13:50,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 09:13:50,686 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:50,686 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-10-04 09:13:50,687 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:50,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:50,687 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-10-04 09:13:50,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:50,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:50,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:50,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:50,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:51,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:51,600 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 [2018-10-04 09:13:51,608 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:13:51,641 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:13:51,642 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:51,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:51,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:51,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:51,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 09:13:51,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 09:13:51,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 09:13:51,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 09:13:51,687 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-10-04 09:13:51,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:51,837 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-04 09:13:51,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 09:13:51,837 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-04 09:13:51,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:51,838 INFO L225 Difference]: With dead ends: 77 [2018-10-04 09:13:51,839 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 09:13:51,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 09:13:51,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 09:13:51,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-04 09:13:51,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 09:13:51,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-04 09:13:51,844 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-10-04 09:13:51,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:51,844 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-04 09:13:51,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 09:13:51,844 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-04 09:13:51,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 09:13:51,845 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:51,845 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-10-04 09:13:51,845 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:51,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:51,846 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-10-04 09:13:51,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:51,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:51,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:51,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:51,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:52,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:52,784 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:13:52,791 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:13:53,088 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-04 09:13:53,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:53,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:53,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:53,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 09:13:53,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 09:13:53,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 09:13:53,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:13:53,132 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-10-04 09:13:53,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:53,196 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-04 09:13:53,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 09:13:53,196 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-04 09:13:53,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:53,197 INFO L225 Difference]: With dead ends: 79 [2018-10-04 09:13:53,197 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 09:13:53,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:13:53,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 09:13:53,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 09:13:53,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 09:13:53,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-04 09:13:53,201 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-10-04 09:13:53,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:53,201 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-04 09:13:53,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 09:13:53,202 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-04 09:13:53,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 09:13:53,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:53,202 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-10-04 09:13:53,202 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:53,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:53,203 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-10-04 09:13:53,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:53,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:53,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:53,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:53,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:54,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:54,600 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 [2018-10-04 09:13:54,609 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:13:54,741 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-04 09:13:54,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:54,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:54,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:54,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:54,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 09:13:54,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 09:13:54,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 09:13:54,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 09:13:54,793 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-10-04 09:13:55,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:55,197 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-04 09:13:55,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 09:13:55,198 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-04 09:13:55,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:55,199 INFO L225 Difference]: With dead ends: 81 [2018-10-04 09:13:55,200 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 09:13:55,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 09:13:55,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 09:13:55,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-04 09:13:55,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 09:13:55,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-04 09:13:55,203 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-10-04 09:13:55,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:55,203 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-04 09:13:55,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 09:13:55,203 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-04 09:13:55,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 09:13:55,204 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:55,204 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-10-04 09:13:55,204 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:55,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:55,204 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-10-04 09:13:55,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:55,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:55,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:55,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:55,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:55,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:55,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:55,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:55,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:13:55,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:55,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:55,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:55,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 09:13:55,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 09:13:55,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 09:13:55,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 09:13:55,961 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-10-04 09:13:56,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:56,034 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-04 09:13:56,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 09:13:56,034 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-04 09:13:56,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:56,035 INFO L225 Difference]: With dead ends: 83 [2018-10-04 09:13:56,035 INFO L226 Difference]: Without dead ends: 81 [2018-10-04 09:13:56,036 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 [2018-10-04 09:13:56,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-04 09:13:56,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-04 09:13:56,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 09:13:56,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-04 09:13:56,038 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-10-04 09:13:56,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:56,038 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-04 09:13:56,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 09:13:56,038 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-04 09:13:56,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 09:13:56,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:56,039 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-10-04 09:13:56,039 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:56,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:56,039 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-10-04 09:13:56,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:56,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:56,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:56,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:56,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:56,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:56,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:56,760 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:13:56,767 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:13:56,794 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:13:56,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:56,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:56,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:56,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 09:13:56,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 09:13:56,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 09:13:56,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 09:13:56,844 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-10-04 09:13:56,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:56,935 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-04 09:13:56,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 09:13:56,935 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-04 09:13:56,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:56,936 INFO L225 Difference]: With dead ends: 85 [2018-10-04 09:13:56,936 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 09:13:56,937 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 [2018-10-04 09:13:56,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 09:13:56,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-04 09:13:56,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 09:13:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-04 09:13:56,941 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-10-04 09:13:56,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:56,941 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-04 09:13:56,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 09:13:56,941 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-04 09:13:56,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 09:13:56,941 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:56,941 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-10-04 09:13:56,942 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:56,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:56,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-10-04 09:13:56,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:56,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:56,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:56,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:56,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:57,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:57,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:13:57,882 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:13:58,051 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-04 09:13:58,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:58,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:58,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:58,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 09:13:58,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 09:13:58,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 09:13:58,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:13:58,094 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-10-04 09:13:58,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:58,241 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-04 09:13:58,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 09:13:58,241 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-04 09:13:58,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:58,242 INFO L225 Difference]: With dead ends: 87 [2018-10-04 09:13:58,242 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 09:13:58,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:13:58,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 09:13:58,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 09:13:58,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 09:13:58,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-04 09:13:58,246 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-10-04 09:13:58,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:58,247 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-04 09:13:58,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 09:13:58,247 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-04 09:13:58,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 09:13:58,247 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:58,247 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-10-04 09:13:58,247 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:58,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:58,248 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-10-04 09:13:58,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:58,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:58,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:58,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:58,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:59,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:59,484 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 [2018-10-04 09:13:59,492 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:13:59,544 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:13:59,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:59,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:59,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:59,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 09:13:59,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 09:13:59,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 09:13:59,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 09:13:59,597 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-10-04 09:13:59,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:59,742 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-04 09:13:59,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 09:13:59,743 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-04 09:13:59,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:59,744 INFO L225 Difference]: With dead ends: 89 [2018-10-04 09:13:59,744 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 09:13:59,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 09:13:59,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 09:13:59,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-04 09:13:59,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 09:13:59,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-04 09:13:59,749 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-10-04 09:13:59,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:59,749 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-04 09:13:59,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 09:13:59,749 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-04 09:13:59,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 09:13:59,750 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:59,750 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-10-04 09:13:59,750 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:59,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:59,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-10-04 09:13:59,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:59,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:59,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:59,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:59,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:00,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:00,578 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 [2018-10-04 09:14:00,586 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:14:01,099 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-04 09:14:01,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:01,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:01,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:01,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:01,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 09:14:01,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 09:14:01,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 09:14:01,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:14:01,153 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-10-04 09:14:01,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:01,249 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-04 09:14:01,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 09:14:01,250 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-04 09:14:01,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:01,251 INFO L225 Difference]: With dead ends: 91 [2018-10-04 09:14:01,251 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 09:14:01,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:14:01,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 09:14:01,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-04 09:14:01,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-04 09:14:01,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-04 09:14:01,255 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-10-04 09:14:01,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:01,255 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-04 09:14:01,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 09:14:01,255 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-04 09:14:01,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 09:14:01,255 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:01,255 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-10-04 09:14:01,256 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:01,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:01,256 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-10-04 09:14:01,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:01,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:01,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:01,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:01,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:02,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:02,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:02,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:14:02,048 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:14:02,235 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-04 09:14:02,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:02,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:02,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:02,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:02,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 09:14:02,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 09:14:02,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 09:14:02,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 09:14:02,280 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-10-04 09:14:02,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:02,356 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-04 09:14:02,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 09:14:02,356 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-04 09:14:02,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:02,357 INFO L225 Difference]: With dead ends: 93 [2018-10-04 09:14:02,358 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 09:14:02,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 09:14:02,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 09:14:02,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 09:14:02,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 09:14:02,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-04 09:14:02,362 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-10-04 09:14:02,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:02,362 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-04 09:14:02,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 09:14:02,363 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-04 09:14:02,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 09:14:02,363 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:02,363 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-10-04 09:14:02,363 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:02,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:02,364 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-10-04 09:14:02,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:02,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:02,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:02,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:02,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:03,416 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:03,417 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 [2018-10-04 09:14:03,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:14:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:03,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:03,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:03,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 09:14:03,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 09:14:03,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 09:14:03,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 09:14:03,493 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-10-04 09:14:03,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:03,582 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-04 09:14:03,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 09:14:03,582 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-04 09:14:03,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:03,583 INFO L225 Difference]: With dead ends: 95 [2018-10-04 09:14:03,583 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 09:14:03,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 09:14:03,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 09:14:03,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-04 09:14:03,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-04 09:14:03,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-04 09:14:03,588 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-10-04 09:14:03,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:03,588 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-04 09:14:03,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 09:14:03,588 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-04 09:14:03,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 09:14:03,589 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:03,589 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-10-04 09:14:03,589 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:03,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:03,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-10-04 09:14:03,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:03,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:03,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:03,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:14:03,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:04,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:04,718 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 [2018-10-04 09:14:04,726 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:14:04,760 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:14:04,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:04,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:04,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:04,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 09:14:04,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 09:14:04,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 09:14:04,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:14:04,805 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-10-04 09:14:05,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:05,197 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-04 09:14:05,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 09:14:05,197 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-04 09:14:05,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:05,199 INFO L225 Difference]: With dead ends: 97 [2018-10-04 09:14:05,199 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 09:14:05,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:14:05,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 09:14:05,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-04 09:14:05,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 09:14:05,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-04 09:14:05,204 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-10-04 09:14:05,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:05,204 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-04 09:14:05,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 09:14:05,204 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-04 09:14:05,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 09:14:05,205 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:05,205 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-10-04 09:14:05,205 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:05,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:05,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-10-04 09:14:05,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:05,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:05,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:05,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:05,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:06,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:06,274 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:06,274 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 [2018-10-04 09:14:06,284 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:14:06,539 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-04 09:14:06,540 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:06,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:06,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:06,584 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:06,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 09:14:06,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 09:14:06,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 09:14:06,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 09:14:06,585 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-10-04 09:14:06,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:06,659 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-04 09:14:06,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 09:14:06,660 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-04 09:14:06,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:06,661 INFO L225 Difference]: With dead ends: 99 [2018-10-04 09:14:06,661 INFO L226 Difference]: Without dead ends: 97 [2018-10-04 09:14:06,662 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 [2018-10-04 09:14:06,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-04 09:14:06,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-04 09:14:06,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-04 09:14:06,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-04 09:14:06,665 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-10-04 09:14:06,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:06,666 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-04 09:14:06,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 09:14:06,666 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-04 09:14:06,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 09:14:06,666 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:06,666 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-10-04 09:14:06,666 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:06,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:06,667 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-10-04 09:14:06,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:06,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:06,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:06,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:06,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:07,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:07,706 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 [2018-10-04 09:14:07,713 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:14:07,751 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:14:07,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:07,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:07,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:07,794 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:07,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 09:14:07,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 09:14:07,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 09:14:07,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 09:14:07,795 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-10-04 09:14:07,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:07,884 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-04 09:14:07,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 09:14:07,884 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-04 09:14:07,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:07,886 INFO L225 Difference]: With dead ends: 101 [2018-10-04 09:14:07,886 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 09:14:07,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 09:14:07,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 09:14:07,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-04 09:14:07,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 09:14:07,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-04 09:14:07,889 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-10-04 09:14:07,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:07,889 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-04 09:14:07,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 09:14:07,890 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-04 09:14:07,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 09:14:07,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:07,890 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-10-04 09:14:07,890 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:07,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:07,890 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-10-04 09:14:07,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:07,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:07,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:07,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:07,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:09,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:09,138 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:14:09,146 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:14:09,975 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-04 09:14:09,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:09,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:10,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:10,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 09:14:10,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 09:14:10,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 09:14:10,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:14:10,018 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-10-04 09:14:10,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:10,117 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-04 09:14:10,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 09:14:10,117 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-04 09:14:10,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:10,118 INFO L225 Difference]: With dead ends: 103 [2018-10-04 09:14:10,118 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 09:14:10,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:14:10,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 09:14:10,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 09:14:10,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 09:14:10,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-04 09:14:10,121 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-10-04 09:14:10,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:10,122 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-04 09:14:10,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 09:14:10,122 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-04 09:14:10,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 09:14:10,122 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:10,122 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-10-04 09:14:10,123 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:10,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:10,123 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-10-04 09:14:10,123 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:10,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:10,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:10,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:10,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:11,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:11,572 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 [2018-10-04 09:14:11,579 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:14:11,843 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-04 09:14:11,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:11,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:11,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:11,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 09:14:11,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 09:14:11,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 09:14:11,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 09:14:11,883 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-10-04 09:14:11,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:11,998 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-04 09:14:11,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 09:14:11,999 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-04 09:14:11,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:12,000 INFO L225 Difference]: With dead ends: 105 [2018-10-04 09:14:12,000 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 09:14:12,001 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 [2018-10-04 09:14:12,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 09:14:12,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-04 09:14:12,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 09:14:12,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-04 09:14:12,005 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-10-04 09:14:12,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:12,006 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-04 09:14:12,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 09:14:12,006 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-04 09:14:12,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 09:14:12,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:12,007 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-10-04 09:14:12,007 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:12,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:12,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-10-04 09:14:12,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:12,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:12,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:12,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:12,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:13,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:13,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:13,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:14:13,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:14:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:13,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:13,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:13,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 09:14:13,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 09:14:13,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 09:14:13,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 09:14:13,136 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-10-04 09:14:13,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:13,262 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-04 09:14:13,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 09:14:13,263 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-04 09:14:13,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:13,263 INFO L225 Difference]: With dead ends: 107 [2018-10-04 09:14:13,264 INFO L226 Difference]: Without dead ends: 105 [2018-10-04 09:14:13,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 09:14:13,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-04 09:14:13,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-04 09:14:13,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 09:14:13,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-04 09:14:13,267 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-10-04 09:14:13,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:13,268 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-04 09:14:13,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 09:14:13,268 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-04 09:14:13,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 09:14:13,268 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:13,269 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-10-04 09:14:13,269 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:13,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:13,269 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-10-04 09:14:13,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:13,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:13,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:13,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:14:13,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:13,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:14,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:14,891 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 [2018-10-04 09:14:14,899 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:14:14,957 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:14:14,957 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:14,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:14,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:15,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:15,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 09:14:15,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 09:14:15,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 09:14:15,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 09:14:15,010 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-10-04 09:14:15,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:15,137 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-04 09:14:15,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 09:14:15,138 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-04 09:14:15,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:15,139 INFO L225 Difference]: With dead ends: 109 [2018-10-04 09:14:15,139 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 09:14:15,139 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 [2018-10-04 09:14:15,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 09:14:15,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-04 09:14:15,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-04 09:14:15,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-04 09:14:15,142 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-10-04 09:14:15,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:15,143 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-04 09:14:15,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 09:14:15,143 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-04 09:14:15,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 09:14:15,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:15,144 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-10-04 09:14:15,144 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:15,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:15,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-10-04 09:14:15,144 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:15,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:15,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:15,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:15,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:15,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:16,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:16,672 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 [2018-10-04 09:14:16,681 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:14:17,054 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-04 09:14:17,054 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:17,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:17,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:17,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 09:14:17,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 09:14:17,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 09:14:17,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:14:17,117 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-10-04 09:14:17,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:17,314 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-04 09:14:17,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 09:14:17,315 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-04 09:14:17,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:17,316 INFO L225 Difference]: With dead ends: 111 [2018-10-04 09:14:17,316 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 09:14:17,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:14:17,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 09:14:17,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-04 09:14:17,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-04 09:14:17,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-04 09:14:17,321 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-10-04 09:14:17,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:17,321 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-04 09:14:17,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 09:14:17,321 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-04 09:14:17,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 09:14:17,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:17,322 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-10-04 09:14:17,322 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:17,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:17,322 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-10-04 09:14:17,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:17,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:17,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:17,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:17,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:19,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:19,820 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:19,820 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 [2018-10-04 09:14:19,835 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:14:19,896 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:14:19,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:19,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:19,942 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:19,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 09:14:19,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 09:14:19,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 09:14:19,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 09:14:19,944 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-10-04 09:14:20,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:20,066 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-04 09:14:20,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 09:14:20,071 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-04 09:14:20,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:20,072 INFO L225 Difference]: With dead ends: 113 [2018-10-04 09:14:20,072 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 09:14:20,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 09:14:20,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 09:14:20,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-04 09:14:20,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-04 09:14:20,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-04 09:14:20,076 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-10-04 09:14:20,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:20,076 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-04 09:14:20,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 09:14:20,077 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-04 09:14:20,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 09:14:20,077 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:20,077 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-10-04 09:14:20,078 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:20,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:20,078 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-10-04 09:14:20,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:20,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:20,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:20,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:20,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:21,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:21,305 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:14:21,322 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:14:22,705 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-04 09:14:22,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:22,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:22,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:22,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:22,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 09:14:22,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 09:14:22,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 09:14:22,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:14:22,749 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-10-04 09:14:22,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:22,855 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-04 09:14:22,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 09:14:22,856 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-04 09:14:22,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:22,857 INFO L225 Difference]: With dead ends: 115 [2018-10-04 09:14:22,857 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 09:14:22,857 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 [2018-10-04 09:14:22,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 09:14:22,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-04 09:14:22,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-04 09:14:22,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-04 09:14:22,861 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-10-04 09:14:22,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:22,862 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-04 09:14:22,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 09:14:22,862 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-04 09:14:22,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 09:14:22,862 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:22,862 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-10-04 09:14:22,863 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:22,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:22,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-10-04 09:14:22,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:22,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:22,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:22,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:22,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:25,101 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:25,101 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 [2018-10-04 09:14:25,107 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:14:25,484 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-04 09:14:25,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:25,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:25,544 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:25,544 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 09:14:25,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 09:14:25,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 09:14:25,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 09:14:25,545 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-10-04 09:14:25,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:25,737 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-04 09:14:25,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 09:14:25,737 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-04 09:14:25,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:25,738 INFO L225 Difference]: With dead ends: 117 [2018-10-04 09:14:25,739 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 09:14:25,739 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 [2018-10-04 09:14:25,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 09:14:25,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-04 09:14:25,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 09:14:25,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-04 09:14:25,743 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-10-04 09:14:25,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:25,743 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-04 09:14:25,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 09:14:25,743 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-04 09:14:25,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 09:14:25,744 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:25,744 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-10-04 09:14:25,744 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:25,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:25,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-10-04 09:14:25,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:25,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:25,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:25,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:25,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:27,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:27,124 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 [2018-10-04 09:14:27,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:14:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:27,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:27,241 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:27,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 09:14:27,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 09:14:27,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 09:14:27,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 09:14:27,243 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-10-04 09:14:27,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:27,850 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-04 09:14:27,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 09:14:27,850 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-04 09:14:27,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:27,851 INFO L225 Difference]: With dead ends: 119 [2018-10-04 09:14:27,851 INFO L226 Difference]: Without dead ends: 117 [2018-10-04 09:14:27,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 09:14:27,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-04 09:14:27,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-04 09:14:27,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-04 09:14:27,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-10-04 09:14:27,855 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-10-04 09:14:27,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:27,856 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-10-04 09:14:27,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 09:14:27,856 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-10-04 09:14:27,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 09:14:27,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:27,857 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-10-04 09:14:27,857 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:27,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:27,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-10-04 09:14:27,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:27,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:27,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:27,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:14:27,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:29,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:29,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:29,377 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:14:29,385 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:14:29,431 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:14:29,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:29,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:29,487 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:29,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 09:14:29,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 09:14:29,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 09:14:29,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 09:14:29,488 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-10-04 09:14:29,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:29,812 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-04 09:14:29,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 09:14:29,812 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-04 09:14:29,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:29,813 INFO L225 Difference]: With dead ends: 121 [2018-10-04 09:14:29,813 INFO L226 Difference]: Without dead ends: 119 [2018-10-04 09:14:29,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 09:14:29,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-04 09:14:29,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-04 09:14:29,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-04 09:14:29,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-04 09:14:29,817 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-10-04 09:14:29,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:29,817 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-04 09:14:29,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 09:14:29,817 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-04 09:14:29,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-04 09:14:29,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:29,818 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-10-04 09:14:29,818 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:29,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:29,818 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-10-04 09:14:29,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:29,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:29,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:29,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:29,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:31,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:31,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:31,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:14:31,341 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:14:31,876 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-04 09:14:31,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:31,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:31,939 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:31,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-04 09:14:31,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 09:14:31,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 09:14:31,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 09:14:31,941 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-10-04 09:14:33,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:33,090 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-04 09:14:33,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 09:14:33,090 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-10-04 09:14:33,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:33,091 INFO L225 Difference]: With dead ends: 123 [2018-10-04 09:14:33,091 INFO L226 Difference]: Without dead ends: 121 [2018-10-04 09:14:33,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 09:14:33,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-04 09:14:33,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-04 09:14:33,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-04 09:14:33,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-10-04 09:14:33,095 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-10-04 09:14:33,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:33,096 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-10-04 09:14:33,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 09:14:33,096 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-10-04 09:14:33,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-04 09:14:33,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:33,096 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-10-04 09:14:33,096 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:33,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:33,097 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-10-04 09:14:33,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:33,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:33,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:33,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:33,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:34,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:34,483 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 [2018-10-04 09:14:34,491 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:14:34,538 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:14:34,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:34,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:34,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:34,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-04 09:14:34,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-04 09:14:34,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-04 09:14:34,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-04 09:14:34,598 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-10-04 09:14:34,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:34,848 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-04 09:14:34,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 09:14:34,849 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-10-04 09:14:34,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:34,849 INFO L225 Difference]: With dead ends: 125 [2018-10-04 09:14:34,849 INFO L226 Difference]: Without dead ends: 123 [2018-10-04 09:14:34,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-04 09:14:34,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-04 09:14:34,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-04 09:14:34,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-04 09:14:34,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-04 09:14:34,853 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-10-04 09:14:34,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:34,853 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-04 09:14:34,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-04 09:14:34,853 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-04 09:14:34,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-04 09:14:34,854 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:34,854 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-10-04 09:14:34,854 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:34,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:34,855 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-10-04 09:14:34,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:34,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:34,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:34,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:34,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:36,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:36,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:14:36,440 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:14:38,433 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-04 09:14:38,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:38,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:38,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:38,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 09:14:38,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 09:14:38,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 09:14:38,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 09:14:38,496 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-10-04 09:14:38,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:38,642 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-04 09:14:38,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 09:14:38,643 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-10-04 09:14:38,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:38,644 INFO L225 Difference]: With dead ends: 127 [2018-10-04 09:14:38,644 INFO L226 Difference]: Without dead ends: 125 [2018-10-04 09:14:38,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 09:14:38,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-04 09:14:38,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-04 09:14:38,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-04 09:14:38,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-10-04 09:14:38,649 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-10-04 09:14:38,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:38,649 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-10-04 09:14:38,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 09:14:38,649 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-10-04 09:14:38,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-04 09:14:38,649 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:38,650 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-10-04 09:14:38,650 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:38,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:38,650 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-10-04 09:14:38,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:38,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:38,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:38,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:38,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:40,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:40,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:14:40,545 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:14:41,066 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-04 09:14:41,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:41,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:41,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:41,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:41,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-04 09:14:41,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-04 09:14:41,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-04 09:14:41,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-04 09:14:41,128 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-10-04 09:14:41,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:41,233 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-04 09:14:41,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 09:14:41,233 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-10-04 09:14:41,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:41,234 INFO L225 Difference]: With dead ends: 129 [2018-10-04 09:14:41,234 INFO L226 Difference]: Without dead ends: 127 [2018-10-04 09:14:41,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-04 09:14:41,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-04 09:14:41,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-04 09:14:41,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-04 09:14:41,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-10-04 09:14:41,239 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-10-04 09:14:41,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:41,240 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-10-04 09:14:41,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-04 09:14:41,240 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-10-04 09:14:41,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-04 09:14:41,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:41,241 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-10-04 09:14:41,241 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:41,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:41,241 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-10-04 09:14:41,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:41,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:41,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:41,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:41,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:42,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:42,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:42,830 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:14:42,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:14:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:42,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:42,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:42,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 09:14:42,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 09:14:42,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 09:14:42,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 09:14:42,945 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-10-04 09:14:43,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:43,158 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-10-04 09:14:43,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 09:14:43,158 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-10-04 09:14:43,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:43,159 INFO L225 Difference]: With dead ends: 131 [2018-10-04 09:14:43,159 INFO L226 Difference]: Without dead ends: 129 [2018-10-04 09:14:43,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 09:14:43,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-04 09:14:43,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-04 09:14:43,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-04 09:14:43,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-10-04 09:14:43,162 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-10-04 09:14:43,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:43,163 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-10-04 09:14:43,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 09:14:43,163 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-10-04 09:14:43,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-04 09:14:43,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:43,164 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-10-04 09:14:43,164 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:43,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:43,164 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-10-04 09:14:43,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:43,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:43,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:43,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:14:43,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:44,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:44,709 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 [2018-10-04 09:14:44,718 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:14:44,774 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:14:44,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:44,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:44,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:44,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:44,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-04 09:14:44,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 09:14:44,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 09:14:44,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 09:14:44,835 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-10-04 09:14:44,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:44,996 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-04 09:14:44,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 09:14:44,997 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-10-04 09:14:44,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:44,997 INFO L225 Difference]: With dead ends: 133 [2018-10-04 09:14:44,997 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 09:14:44,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 09:14:44,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 09:14:45,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-04 09:14:45,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-04 09:14:45,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-04 09:14:45,000 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-10-04 09:14:45,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:45,001 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-04 09:14:45,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 09:14:45,001 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-04 09:14:45,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-04 09:14:45,002 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:45,002 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-10-04 09:14:45,002 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:45,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:45,002 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-10-04 09:14:45,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:45,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:45,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:45,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:45,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:46,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:46,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:46,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:14:46,604 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:14:47,343 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-04 09:14:47,343 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:47,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:47,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:47,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-04 09:14:47,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 09:14:47,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 09:14:47,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 09:14:47,391 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-10-04 09:14:47,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:47,568 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-04 09:14:47,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 09:14:47,569 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-10-04 09:14:47,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:47,569 INFO L225 Difference]: With dead ends: 135 [2018-10-04 09:14:47,569 INFO L226 Difference]: Without dead ends: 133 [2018-10-04 09:14:47,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 09:14:47,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-04 09:14:47,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-04 09:14:47,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-04 09:14:47,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-10-04 09:14:47,573 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-10-04 09:14:47,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:47,573 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-10-04 09:14:47,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 09:14:47,574 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-10-04 09:14:47,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-04 09:14:47,574 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:47,575 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-10-04 09:14:47,575 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:47,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:47,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-10-04 09:14:47,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:47,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:47,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:47,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:47,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:49,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:49,141 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 [2018-10-04 09:14:49,150 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:14:49,220 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:14:49,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:49,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:49,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:49,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-04 09:14:49,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-04 09:14:49,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-04 09:14:49,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 09:14:49,293 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-10-04 09:14:50,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:50,455 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-04 09:14:50,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 09:14:50,455 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-10-04 09:14:50,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:50,456 INFO L225 Difference]: With dead ends: 137 [2018-10-04 09:14:50,456 INFO L226 Difference]: Without dead ends: 135 [2018-10-04 09:14:50,456 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 [2018-10-04 09:14:50,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-04 09:14:50,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-04 09:14:50,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-04 09:14:50,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-10-04 09:14:50,462 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-10-04 09:14:50,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:50,462 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-10-04 09:14:50,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-04 09:14:50,462 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-10-04 09:14:50,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-04 09:14:50,463 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:50,463 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-10-04 09:14:50,463 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:50,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:50,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-10-04 09:14:50,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:50,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:50,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:50,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:50,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:52,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:52,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:14:52,069 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:14:54,855 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-04 09:14:54,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:54,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:54,925 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:54,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 09:14:54,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 09:14:54,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 09:14:54,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 09:14:54,927 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-10-04 09:14:55,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:55,183 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-04 09:14:55,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 09:14:55,183 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-10-04 09:14:55,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:55,184 INFO L225 Difference]: With dead ends: 139 [2018-10-04 09:14:55,184 INFO L226 Difference]: Without dead ends: 137 [2018-10-04 09:14:55,185 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 [2018-10-04 09:14:55,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-04 09:14:55,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-04 09:14:55,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-04 09:14:55,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-10-04 09:14:55,187 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-10-04 09:14:55,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:55,187 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-10-04 09:14:55,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 09:14:55,187 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-10-04 09:14:55,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-04 09:14:55,188 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:55,188 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-10-04 09:14:55,188 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:55,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:55,188 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-10-04 09:14:55,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:55,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:55,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:55,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:55,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:56,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:56,973 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 [2018-10-04 09:14:56,981 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:14:57,706 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-04 09:14:57,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:57,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:57,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:57,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:57,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-04 09:14:57,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-04 09:14:57,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-04 09:14:57,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-04 09:14:57,778 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-10-04 09:14:57,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:57,917 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-04 09:14:57,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 09:14:57,918 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-10-04 09:14:57,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:57,919 INFO L225 Difference]: With dead ends: 141 [2018-10-04 09:14:57,919 INFO L226 Difference]: Without dead ends: 139 [2018-10-04 09:14:57,919 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 [2018-10-04 09:14:57,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-04 09:14:57,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-04 09:14:57,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-04 09:14:57,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-10-04 09:14:57,923 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-10-04 09:14:57,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:57,924 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-10-04 09:14:57,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-04 09:14:57,924 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-10-04 09:14:57,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-04 09:14:57,924 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:57,925 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-10-04 09:14:57,925 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:57,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:57,925 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-10-04 09:14:57,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:57,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:57,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:57,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:57,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:59,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:59,619 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 [2018-10-04 09:14:59,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:14:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:59,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:59,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:59,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 09:14:59,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 09:14:59,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 09:14:59,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 09:14:59,736 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-10-04 09:14:59,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:59,857 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-10-04 09:14:59,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 09:14:59,857 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-10-04 09:14:59,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:59,859 INFO L225 Difference]: With dead ends: 143 [2018-10-04 09:14:59,859 INFO L226 Difference]: Without dead ends: 141 [2018-10-04 09:14:59,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 09:14:59,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-04 09:14:59,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-04 09:14:59,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-04 09:14:59,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-10-04 09:14:59,863 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-10-04 09:14:59,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:59,863 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-10-04 09:14:59,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 09:14:59,863 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-10-04 09:14:59,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-04 09:14:59,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:59,864 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-10-04 09:14:59,864 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:59,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:59,864 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-10-04 09:14:59,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:59,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:59,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:59,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:14:59,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:01,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:01,974 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 [2018-10-04 09:15:01,981 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:15:02,028 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:15:02,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:02,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:02,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:02,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:02,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-04 09:15:02,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 09:15:02,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 09:15:02,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 09:15:02,077 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-10-04 09:15:02,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:02,193 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-04 09:15:02,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 09:15:02,193 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-10-04 09:15:02,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:02,195 INFO L225 Difference]: With dead ends: 145 [2018-10-04 09:15:02,195 INFO L226 Difference]: Without dead ends: 143 [2018-10-04 09:15:02,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 09:15:02,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-04 09:15:02,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-04 09:15:02,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-04 09:15:02,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-04 09:15:02,199 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-10-04 09:15:02,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:02,199 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-04 09:15:02,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 09:15:02,199 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-04 09:15:02,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-04 09:15:02,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:02,200 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-10-04 09:15:02,200 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:02,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:02,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-10-04 09:15:02,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:02,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:02,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:02,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:02,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:02,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:04,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:04,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:04,010 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:15:04,017 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:15:05,047 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-04 09:15:05,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:05,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:05,110 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:05,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-04 09:15:05,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 09:15:05,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 09:15:05,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 09:15:05,112 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-10-04 09:15:05,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:05,351 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-04 09:15:05,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 09:15:05,351 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-10-04 09:15:05,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:05,352 INFO L225 Difference]: With dead ends: 147 [2018-10-04 09:15:05,352 INFO L226 Difference]: Without dead ends: 145 [2018-10-04 09:15:05,353 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 [2018-10-04 09:15:05,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-04 09:15:05,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-04 09:15:05,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-04 09:15:05,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-10-04 09:15:05,355 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-10-04 09:15:05,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:05,356 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-10-04 09:15:05,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 09:15:05,356 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-10-04 09:15:05,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-04 09:15:05,356 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:05,356 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-10-04 09:15:05,357 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:05,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:05,357 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-10-04 09:15:05,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:05,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:05,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:05,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:05,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:07,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:07,298 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 [2018-10-04 09:15:07,305 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:15:07,359 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:15:07,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:07,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:07,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:07,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-04 09:15:07,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-04 09:15:07,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-04 09:15:07,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-04 09:15:07,420 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-10-04 09:15:07,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:07,630 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-04 09:15:07,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 09:15:07,631 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-10-04 09:15:07,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:07,632 INFO L225 Difference]: With dead ends: 149 [2018-10-04 09:15:07,632 INFO L226 Difference]: Without dead ends: 147 [2018-10-04 09:15:07,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-04 09:15:07,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-04 09:15:07,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-04 09:15:07,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-04 09:15:07,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-10-04 09:15:07,635 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-10-04 09:15:07,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:07,636 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-10-04 09:15:07,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-04 09:15:07,636 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-10-04 09:15:07,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-04 09:15:07,636 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:07,636 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-10-04 09:15:07,637 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:07,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:07,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-10-04 09:15:07,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:07,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:07,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:07,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:07,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:09,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:09,518 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 [2018-10-04 09:15:09,526 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:15:13,300 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-04 09:15:13,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:13,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:13,373 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:13,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-04 09:15:13,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 09:15:13,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 09:15:13,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 09:15:13,375 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-10-04 09:15:13,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:13,714 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-04 09:15:13,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 09:15:13,715 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-10-04 09:15:13,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:13,719 INFO L225 Difference]: With dead ends: 151 [2018-10-04 09:15:13,719 INFO L226 Difference]: Without dead ends: 149 [2018-10-04 09:15:13,720 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 [2018-10-04 09:15:13,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-04 09:15:13,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-04 09:15:13,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-04 09:15:13,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-10-04 09:15:13,723 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-10-04 09:15:13,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:13,723 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-10-04 09:15:13,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 09:15:13,723 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-10-04 09:15:13,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-04 09:15:13,724 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:13,724 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-10-04 09:15:13,725 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:13,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:13,725 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-10-04 09:15:13,725 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:13,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:13,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:13,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:13,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:16,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:16,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:15:16,025 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:15:16,979 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-04 09:15:16,979 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:16,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:17,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:17,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:17,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-04 09:15:17,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-04 09:15:17,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-04 09:15:17,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-04 09:15:17,046 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-10-04 09:15:17,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:17,198 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-04 09:15:17,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 09:15:17,198 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-10-04 09:15:17,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:17,199 INFO L225 Difference]: With dead ends: 153 [2018-10-04 09:15:17,199 INFO L226 Difference]: Without dead ends: 151 [2018-10-04 09:15:17,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-04 09:15:17,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-04 09:15:17,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-04 09:15:17,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-04 09:15:17,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-10-04 09:15:17,203 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-10-04 09:15:17,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:17,204 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-10-04 09:15:17,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-04 09:15:17,204 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-10-04 09:15:17,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-04 09:15:17,205 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:17,205 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-10-04 09:15:17,205 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:17,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:17,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-10-04 09:15:17,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:17,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:17,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:17,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:17,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:19,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:19,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:19,224 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 [2018-10-04 09:15:19,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:15:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:19,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:19,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:19,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-04 09:15:19,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 09:15:19,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 09:15:19,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 09:15:19,351 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-10-04 09:15:19,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:19,544 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-10-04 09:15:19,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 09:15:19,544 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-10-04 09:15:19,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:19,545 INFO L225 Difference]: With dead ends: 155 [2018-10-04 09:15:19,545 INFO L226 Difference]: Without dead ends: 153 [2018-10-04 09:15:19,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 09:15:19,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-04 09:15:19,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-04 09:15:19,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-04 09:15:19,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-10-04 09:15:19,549 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-10-04 09:15:19,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:19,549 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-10-04 09:15:19,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 09:15:19,549 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-10-04 09:15:19,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-04 09:15:19,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:19,550 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-10-04 09:15:19,550 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:19,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:19,550 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-10-04 09:15:19,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:19,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:19,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:19,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:15:19,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:21,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:21,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:21,914 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 [2018-10-04 09:15:21,920 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:15:21,975 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:15:21,976 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:21,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:22,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:22,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-04 09:15:22,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 09:15:22,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 09:15:22,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 09:15:22,032 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-10-04 09:15:22,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:22,244 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-04 09:15:22,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 09:15:22,244 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-10-04 09:15:22,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:22,245 INFO L225 Difference]: With dead ends: 157 [2018-10-04 09:15:22,245 INFO L226 Difference]: Without dead ends: 155 [2018-10-04 09:15:22,246 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 [2018-10-04 09:15:22,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-04 09:15:22,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-04 09:15:22,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-04 09:15:22,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-10-04 09:15:22,248 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-10-04 09:15:22,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:22,248 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-10-04 09:15:22,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 09:15:22,249 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-10-04 09:15:22,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-04 09:15:22,249 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:22,249 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-10-04 09:15:22,250 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:22,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:22,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-10-04 09:15:22,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:22,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:22,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:22,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:22,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:24,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:24,371 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:24,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:15:24,379 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:15:25,798 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-04 09:15:25,798 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:25,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:25,855 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:25,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-04 09:15:25,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 09:15:25,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 09:15:25,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 09:15:25,856 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-10-04 09:15:26,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:26,133 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-10-04 09:15:26,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 09:15:26,133 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-10-04 09:15:26,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:26,134 INFO L225 Difference]: With dead ends: 159 [2018-10-04 09:15:26,134 INFO L226 Difference]: Without dead ends: 157 [2018-10-04 09:15:26,134 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 [2018-10-04 09:15:26,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-04 09:15:26,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-04 09:15:26,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-04 09:15:26,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-10-04 09:15:26,137 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-10-04 09:15:26,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:26,137 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-10-04 09:15:26,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 09:15:26,137 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-10-04 09:15:26,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-04 09:15:26,138 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:26,138 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-10-04 09:15:26,138 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:26,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:26,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-10-04 09:15:26,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:26,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:26,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:26,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:26,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:28,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:28,262 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 [2018-10-04 09:15:28,270 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:15:28,325 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:15:28,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:28,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:28,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:28,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-04 09:15:28,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-04 09:15:28,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-04 09:15:28,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-04 09:15:28,382 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-10-04 09:15:28,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:28,604 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-10-04 09:15:28,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 09:15:28,604 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-10-04 09:15:28,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:28,605 INFO L225 Difference]: With dead ends: 161 [2018-10-04 09:15:28,605 INFO L226 Difference]: Without dead ends: 159 [2018-10-04 09:15:28,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-04 09:15:28,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-04 09:15:28,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-04 09:15:28,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-04 09:15:28,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-10-04 09:15:28,619 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-10-04 09:15:28,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:28,619 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-10-04 09:15:28,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-04 09:15:28,620 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-10-04 09:15:28,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-04 09:15:28,620 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:28,620 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-10-04 09:15:28,620 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:28,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:28,621 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-10-04 09:15:28,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:28,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:28,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:28,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:28,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:31,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:31,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:31,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:15:31,194 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:15:36,588 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-04 09:15:36,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:36,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:36,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:36,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-04 09:15:36,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 09:15:36,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 09:15:36,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 09:15:36,651 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-10-04 09:15:37,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:37,184 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-04 09:15:37,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 09:15:37,184 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-10-04 09:15:37,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:37,185 INFO L225 Difference]: With dead ends: 163 [2018-10-04 09:15:37,185 INFO L226 Difference]: Without dead ends: 161 [2018-10-04 09:15:37,186 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 [2018-10-04 09:15:37,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-04 09:15:37,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-04 09:15:37,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-04 09:15:37,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-10-04 09:15:37,190 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-10-04 09:15:37,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:37,190 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-10-04 09:15:37,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 09:15:37,190 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-10-04 09:15:37,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-04 09:15:37,191 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:37,191 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-10-04 09:15:37,192 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:37,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:37,192 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-10-04 09:15:37,192 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:37,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:37,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:37,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:37,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:37,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:39,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:39,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:39,543 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 [2018-10-04 09:15:39,549 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:15:40,787 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-04 09:15:40,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:40,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:40,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:40,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-04 09:15:40,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-04 09:15:40,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-04 09:15:40,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-04 09:15:40,845 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-10-04 09:15:41,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:41,033 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-10-04 09:15:41,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 09:15:41,033 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-10-04 09:15:41,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:41,034 INFO L225 Difference]: With dead ends: 165 [2018-10-04 09:15:41,034 INFO L226 Difference]: Without dead ends: 163 [2018-10-04 09:15:41,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-04 09:15:41,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-04 09:15:41,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-04 09:15:41,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-04 09:15:41,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-10-04 09:15:41,038 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-10-04 09:15:41,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:41,039 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-10-04 09:15:41,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-04 09:15:41,039 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-10-04 09:15:41,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-04 09:15:41,040 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:41,040 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-10-04 09:15:41,040 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:41,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:41,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-10-04 09:15:41,041 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:41,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:41,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:41,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:41,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:41,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:43,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:43,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:43,493 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 [2018-10-04 09:15:43,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:15:43,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:43,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:43,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:43,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-04 09:15:43,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 09:15:43,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 09:15:43,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 09:15:43,608 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-10-04 09:15:43,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:43,851 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-10-04 09:15:43,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 09:15:43,851 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-10-04 09:15:43,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:43,852 INFO L225 Difference]: With dead ends: 167 [2018-10-04 09:15:43,852 INFO L226 Difference]: Without dead ends: 165 [2018-10-04 09:15:43,852 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 [2018-10-04 09:15:43,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-04 09:15:43,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-04 09:15:43,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-04 09:15:43,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-10-04 09:15:43,855 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-10-04 09:15:43,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:43,855 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-10-04 09:15:43,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 09:15:43,855 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-10-04 09:15:43,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-04 09:15:43,856 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:43,856 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-10-04 09:15:43,857 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:43,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:43,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-10-04 09:15:43,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:43,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:43,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:43,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:15:43,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:46,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:46,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:46,525 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:15:46,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:15:46,590 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:15:46,590 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:46,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:46,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:46,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:46,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-04 09:15:46,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 09:15:46,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 09:15:46,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 09:15:46,674 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-10-04 09:15:46,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:46,847 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-10-04 09:15:46,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 09:15:46,848 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-10-04 09:15:46,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:46,848 INFO L225 Difference]: With dead ends: 169 [2018-10-04 09:15:46,848 INFO L226 Difference]: Without dead ends: 167 [2018-10-04 09:15:46,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 09:15:46,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-04 09:15:46,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-04 09:15:46,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-04 09:15:46,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-10-04 09:15:46,851 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-10-04 09:15:46,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:46,852 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-10-04 09:15:46,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 09:15:46,852 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-10-04 09:15:46,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-04 09:15:46,852 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:46,852 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-10-04 09:15:46,853 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:46,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:46,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-10-04 09:15:46,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:46,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:46,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:46,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:46,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:49,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:49,296 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:49,296 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 [2018-10-04 09:15:49,303 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:15:51,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-10-04 09:15:51,178 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:51,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:51,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:51,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:51,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-04 09:15:51,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 09:15:51,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 09:15:51,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 09:15:51,240 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-10-04 09:15:51,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:51,427 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-10-04 09:15:51,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-04 09:15:51,428 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-10-04 09:15:51,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:51,429 INFO L225 Difference]: With dead ends: 171 [2018-10-04 09:15:51,429 INFO L226 Difference]: Without dead ends: 169 [2018-10-04 09:15:51,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 09:15:51,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-04 09:15:51,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-04 09:15:51,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-04 09:15:51,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-10-04 09:15:51,433 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-10-04 09:15:51,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:51,433 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-10-04 09:15:51,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 09:15:51,433 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-10-04 09:15:51,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-04 09:15:51,434 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:51,434 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-10-04 09:15:51,434 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:51,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:51,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-10-04 09:15:51,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:51,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:51,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:51,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:51,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:53,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:53,995 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 [2018-10-04 09:15:54,003 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:15:54,062 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:15:54,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:54,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:54,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:54,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-04 09:15:54,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-04 09:15:54,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-04 09:15:54,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-04 09:15:54,117 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-10-04 09:15:54,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:54,388 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-10-04 09:15:54,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-04 09:15:54,388 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-10-04 09:15:54,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:54,389 INFO L225 Difference]: With dead ends: 173 [2018-10-04 09:15:54,389 INFO L226 Difference]: Without dead ends: 171 [2018-10-04 09:15:54,390 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 [2018-10-04 09:15:54,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-04 09:15:54,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-04 09:15:54,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-04 09:15:54,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-10-04 09:15:54,393 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-10-04 09:15:54,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:54,393 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-10-04 09:15:54,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-04 09:15:54,393 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-10-04 09:15:54,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-04 09:15:54,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:54,394 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-10-04 09:15:54,394 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:54,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:54,394 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-10-04 09:15:54,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:54,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:54,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:54,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:54,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:57,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:57,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:57,327 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 [2018-10-04 09:15:57,334 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:16:04,248 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-10-04 09:16:04,248 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:04,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:04,305 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:04,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-04 09:16:04,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 09:16:04,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 09:16:04,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 09:16:04,306 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-10-04 09:16:04,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:04,571 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-10-04 09:16:04,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-04 09:16:04,571 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-10-04 09:16:04,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:04,572 INFO L225 Difference]: With dead ends: 175 [2018-10-04 09:16:04,572 INFO L226 Difference]: Without dead ends: 173 [2018-10-04 09:16:04,572 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 [2018-10-04 09:16:04,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-04 09:16:04,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-04 09:16:04,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-04 09:16:04,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-10-04 09:16:04,577 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-10-04 09:16:04,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:04,577 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-10-04 09:16:04,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 09:16:04,578 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-10-04 09:16:04,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-04 09:16:04,578 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:04,578 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-10-04 09:16:04,579 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:04,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:04,579 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-10-04 09:16:04,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:04,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:04,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:04,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:04,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:07,412 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:07,412 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 [2018-10-04 09:16:07,419 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:16:09,028 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-10-04 09:16:09,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:09,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:09,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:09,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:09,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-04 09:16:09,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-04 09:16:09,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-04 09:16:09,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-04 09:16:09,111 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-10-04 09:16:09,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:09,561 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-10-04 09:16:09,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-04 09:16:09,561 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-10-04 09:16:09,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:09,562 INFO L225 Difference]: With dead ends: 177 [2018-10-04 09:16:09,562 INFO L226 Difference]: Without dead ends: 175 [2018-10-04 09:16:09,563 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-04 09:16:09,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-04 09:16:09,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-04 09:16:09,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-04 09:16:09,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-10-04 09:16:09,566 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-10-04 09:16:09,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:09,566 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-10-04 09:16:09,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-04 09:16:09,567 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-10-04 09:16:09,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-04 09:16:09,568 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:09,568 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-10-04 09:16:09,568 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:09,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:09,568 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-10-04 09:16:09,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:09,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:09,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:09,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:09,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:12,725 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:12,725 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:16:12,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:12,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:12,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:12,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:12,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-04 09:16:12,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 09:16:12,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 09:16:12,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 09:16:12,849 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-10-04 09:16:13,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:13,133 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-10-04 09:16:13,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-04 09:16:13,133 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-10-04 09:16:13,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:13,134 INFO L225 Difference]: With dead ends: 179 [2018-10-04 09:16:13,134 INFO L226 Difference]: Without dead ends: 177 [2018-10-04 09:16:13,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 09:16:13,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-04 09:16:13,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-10-04 09:16:13,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-04 09:16:13,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-10-04 09:16:13,138 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-10-04 09:16:13,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:13,140 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-10-04 09:16:13,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 09:16:13,140 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-10-04 09:16:13,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-04 09:16:13,141 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:13,141 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-10-04 09:16:13,141 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:13,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:13,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-10-04 09:16:13,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:13,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:13,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:13,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:13,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:15,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:15,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:16:15,949 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:16:16,022 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:16:16,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:16,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:16,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:16,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-04 09:16:16,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-04 09:16:16,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-04 09:16:16,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-04 09:16:16,080 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-10-04 09:16:16,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:16,250 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-10-04 09:16:16,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-04 09:16:16,250 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-10-04 09:16:16,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:16,251 INFO L225 Difference]: With dead ends: 181 [2018-10-04 09:16:16,251 INFO L226 Difference]: Without dead ends: 179 [2018-10-04 09:16:16,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-04 09:16:16,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-04 09:16:16,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-10-04 09:16:16,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-04 09:16:16,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-10-04 09:16:16,254 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-10-04 09:16:16,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:16,255 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-10-04 09:16:16,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-04 09:16:16,255 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-10-04 09:16:16,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-04 09:16:16,255 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:16,256 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-10-04 09:16:16,256 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:16,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:16,256 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-10-04 09:16:16,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:16,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:16,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:16,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:16,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:16,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:19,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:19,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:16:19,351 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:16:21,836 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-10-04 09:16:21,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:21,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:21,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:21,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-04 09:16:21,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 09:16:21,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 09:16:21,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 09:16:21,897 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-10-04 09:16:22,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:22,235 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-10-04 09:16:22,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-04 09:16:22,235 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-10-04 09:16:22,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:22,236 INFO L225 Difference]: With dead ends: 183 [2018-10-04 09:16:22,236 INFO L226 Difference]: Without dead ends: 181 [2018-10-04 09:16:22,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 09:16:22,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-04 09:16:22,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-04 09:16:22,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-04 09:16:22,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-10-04 09:16:22,239 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-10-04 09:16:22,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:22,240 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-10-04 09:16:22,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 09:16:22,240 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-10-04 09:16:22,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-04 09:16:22,240 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:22,241 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-10-04 09:16:22,241 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:22,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:22,241 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-10-04 09:16:22,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:22,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:22,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:22,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:22,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:25,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:25,141 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 [2018-10-04 09:16:25,148 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:16:25,210 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:16:25,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:25,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:25,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:25,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-04 09:16:25,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-04 09:16:25,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-04 09:16:25,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-04 09:16:25,269 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-10-04 09:16:25,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:25,455 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-10-04 09:16:25,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-04 09:16:25,455 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-10-04 09:16:25,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:25,457 INFO L225 Difference]: With dead ends: 185 [2018-10-04 09:16:25,457 INFO L226 Difference]: Without dead ends: 183 [2018-10-04 09:16:25,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-04 09:16:25,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-04 09:16:25,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-10-04 09:16:25,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-04 09:16:25,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-10-04 09:16:25,461 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-10-04 09:16:25,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:25,461 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-10-04 09:16:25,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-04 09:16:25,461 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-10-04 09:16:25,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-04 09:16:25,462 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:25,462 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-10-04 09:16:25,462 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:25,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:25,463 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-10-04 09:16:25,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:25,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:25,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:25,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:25,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:28,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:28,638 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 [2018-10-04 09:16:28,645 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:16:39,084 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-10-04 09:16:39,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:39,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:39,148 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:39,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-04 09:16:39,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 09:16:39,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 09:16:39,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 09:16:39,150 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-10-04 09:16:39,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:39,488 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-10-04 09:16:39,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-04 09:16:39,489 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-10-04 09:16:39,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:39,489 INFO L225 Difference]: With dead ends: 187 [2018-10-04 09:16:39,490 INFO L226 Difference]: Without dead ends: 185 [2018-10-04 09:16:39,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 09:16:39,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-04 09:16:39,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-10-04 09:16:39,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-04 09:16:39,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-10-04 09:16:39,493 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-10-04 09:16:39,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:39,494 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-10-04 09:16:39,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 09:16:39,494 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-10-04 09:16:39,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-04 09:16:39,495 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:39,495 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-10-04 09:16:39,495 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:39,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:39,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-10-04 09:16:39,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:39,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:39,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:39,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:39,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:39,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:42,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:42,642 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:16:42,650 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:16:44,903 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-10-04 09:16:44,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:44,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:44,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:44,967 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:44,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-04 09:16:44,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-04 09:16:44,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-04 09:16:44,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-04 09:16:44,968 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-10-04 09:16:45,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:45,218 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-10-04 09:16:45,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-04 09:16:45,218 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-10-04 09:16:45,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:45,219 INFO L225 Difference]: With dead ends: 189 [2018-10-04 09:16:45,219 INFO L226 Difference]: Without dead ends: 187 [2018-10-04 09:16:45,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-04 09:16:45,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-04 09:16:45,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-04 09:16:45,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-04 09:16:45,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-10-04 09:16:45,223 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-10-04 09:16:45,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:45,224 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-10-04 09:16:45,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-04 09:16:45,224 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-10-04 09:16:45,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-04 09:16:45,225 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:45,225 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-10-04 09:16:45,225 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:45,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:45,226 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-10-04 09:16:45,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:45,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:45,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:45,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:45,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:48,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:48,754 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 [2018-10-04 09:16:48,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:48,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:48,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:48,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:48,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-04 09:16:48,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 09:16:48,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 09:16:48,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 09:16:48,890 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-10-04 09:16:49,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:49,103 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-10-04 09:16:49,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-04 09:16:49,104 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-10-04 09:16:49,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:49,105 INFO L225 Difference]: With dead ends: 191 [2018-10-04 09:16:49,105 INFO L226 Difference]: Without dead ends: 189 [2018-10-04 09:16:49,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 09:16:49,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-04 09:16:49,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-10-04 09:16:49,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-04 09:16:49,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-10-04 09:16:49,109 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-10-04 09:16:49,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:49,109 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-10-04 09:16:49,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 09:16:49,110 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-10-04 09:16:49,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-04 09:16:49,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:49,111 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-10-04 09:16:49,111 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:49,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:49,111 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-10-04 09:16:49,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:49,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:49,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:49,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:49,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:52,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:52,332 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 [2018-10-04 09:16:52,339 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:16:52,412 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:16:52,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:52,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:52,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:52,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:52,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-04 09:16:52,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-04 09:16:52,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-04 09:16:52,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-04 09:16:52,470 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-10-04 09:16:52,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:52,654 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-10-04 09:16:52,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-04 09:16:52,654 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-10-04 09:16:52,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:52,655 INFO L225 Difference]: With dead ends: 193 [2018-10-04 09:16:52,655 INFO L226 Difference]: Without dead ends: 191 [2018-10-04 09:16:52,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-04 09:16:52,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-04 09:16:52,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-04 09:16:52,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-04 09:16:52,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-10-04 09:16:52,659 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-10-04 09:16:52,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:52,660 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-10-04 09:16:52,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-04 09:16:52,660 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-10-04 09:16:52,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-04 09:16:52,661 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:52,661 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-10-04 09:16:52,661 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:52,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:52,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-10-04 09:16:52,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:52,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:52,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:52,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:52,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:56,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:56,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:56,861 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 [2018-10-04 09:16:56,868 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:17:00,176 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-10-04 09:17:00,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:00,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:00,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:00,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-04 09:17:00,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 09:17:00,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 09:17:00,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 09:17:00,244 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-10-04 09:17:00,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:00,454 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-10-04 09:17:00,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-04 09:17:00,454 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-10-04 09:17:00,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:00,455 INFO L225 Difference]: With dead ends: 195 [2018-10-04 09:17:00,455 INFO L226 Difference]: Without dead ends: 193 [2018-10-04 09:17:00,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 09:17:00,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-04 09:17:00,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-10-04 09:17:00,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-04 09:17:00,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-10-04 09:17:00,459 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-10-04 09:17:00,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:00,459 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-10-04 09:17:00,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 09:17:00,459 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-10-04 09:17:00,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-04 09:17:00,460 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:00,460 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-10-04 09:17:00,460 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:00,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:00,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-10-04 09:17:00,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:00,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:00,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:00,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:00,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:04,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:04,069 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:17:04,078 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:17:04,143 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:17:04,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:04,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:04,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:04,220 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:04,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-04 09:17:04,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-04 09:17:04,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-04 09:17:04,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-04 09:17:04,221 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-10-04 09:17:04,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:04,535 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-10-04 09:17:04,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-04 09:17:04,536 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-10-04 09:17:04,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:04,536 INFO L225 Difference]: With dead ends: 197 [2018-10-04 09:17:04,537 INFO L226 Difference]: Without dead ends: 195 [2018-10-04 09:17:04,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-04 09:17:04,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-04 09:17:04,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-10-04 09:17:04,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-04 09:17:04,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-10-04 09:17:04,541 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-10-04 09:17:04,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:04,541 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-10-04 09:17:04,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-04 09:17:04,541 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-10-04 09:17:04,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-04 09:17:04,542 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:04,542 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-10-04 09:17:04,542 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:04,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:04,542 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-10-04 09:17:04,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:04,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:04,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:04,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:04,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:07,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:07,809 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 [2018-10-04 09:17:07,821 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:17:20,447 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-10-04 09:17:20,447 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:20,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:20,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:20,511 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:20,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-04 09:17:20,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 09:17:20,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 09:17:20,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 09:17:20,513 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-10-04 09:17:20,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:20,839 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-10-04 09:17:20,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-04 09:17:20,840 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-10-04 09:17:20,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:20,841 INFO L225 Difference]: With dead ends: 199 [2018-10-04 09:17:20,841 INFO L226 Difference]: Without dead ends: 197 [2018-10-04 09:17:20,841 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 [2018-10-04 09:17:20,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-04 09:17:20,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-10-04 09:17:20,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-04 09:17:20,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-10-04 09:17:20,845 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-10-04 09:17:20,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:20,845 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-10-04 09:17:20,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 09:17:20,845 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-10-04 09:17:20,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-04 09:17:20,846 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:20,846 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-10-04 09:17:20,847 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:20,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:20,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-10-04 09:17:20,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:20,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:20,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:20,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:20,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:24,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:24,707 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 [2018-10-04 09:17:24,715 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:17:27,469 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-10-04 09:17:27,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:27,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:27,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:27,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-04 09:17:27,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-04 09:17:27,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-04 09:17:27,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-04 09:17:27,538 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2018-10-04 09:17:27,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:27,755 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-10-04 09:17:27,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-04 09:17:27,756 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2018-10-04 09:17:27,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:27,756 INFO L225 Difference]: With dead ends: 201 [2018-10-04 09:17:27,757 INFO L226 Difference]: Without dead ends: 199 [2018-10-04 09:17:27,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-04 09:17:27,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-04 09:17:27,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-10-04 09:17:27,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-04 09:17:27,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-10-04 09:17:27,760 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2018-10-04 09:17:27,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:27,760 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-10-04 09:17:27,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-04 09:17:27,760 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-10-04 09:17:27,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-04 09:17:27,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:27,761 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-10-04 09:17:27,761 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:27,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:27,762 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 97 times [2018-10-04 09:17:27,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:27,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:27,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:27,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:27,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-04 09:17:31,393 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 09:17:31,397 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 09:17:31,397 INFO L202 PluginConnector]: Adding new model array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 09:17:31 BoogieIcfgContainer [2018-10-04 09:17:31,397 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 09:17:31,398 INFO L168 Benchmark]: Toolchain (without parser) took 243860.25 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -22.5 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 104.8 MB). Peak memory consumption was 82.3 MB. Max. memory is 7.1 GB. [2018-10-04 09:17:31,399 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:17:31,399 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.66 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:17:31,400 INFO L168 Benchmark]: Boogie Preprocessor took 18.14 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:17:31,400 INFO L168 Benchmark]: RCFGBuilder took 278.64 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 09:17:31,400 INFO L168 Benchmark]: TraceAbstraction took 243517.58 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -22.5 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 83.7 MB). Peak memory consumption was 61.1 MB. Max. memory is 7.1 GB. [2018-10-04 09:17:31,402 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.66 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 18.14 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 278.64 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 243517.58 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -22.5 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 83.7 MB). Peak memory consumption was 61.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 37]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 37). Cancelled while BasicCegarLoop was analyzing trace of length 199 with TraceHistMax 98, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 98 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 243.4s OverallTime, 98 OverallIterations, 98 TraceHistogramMax, 18.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 388 SDtfs, 0 SDslu, 7887 SDs, 0 SdLazy, 7984 SolverSat, 159 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14450 GetRequests, 9697 SyntacticMatches, 0 SemanticMatches, 4753 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 136.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=199occurred in iteration=97, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 97 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.8s SsaConstructionTime, 73.7s SatisfiabilityAnalysisTime, 141.5s InterpolantComputationTime, 19396 NumberOfCodeBlocks, 19396 NumberOfCodeBlocksAsserted, 2609 NumberOfCheckSat, 19203 ConstructedInterpolants, 0 QuantifiedInterpolants, 7490901 SizeOfPredicates, 96 NumberOfNonLiveVariables, 24528 ConjunctsInSsa, 4848 ConjunctsInUnsatCore, 193 InterpolantComputations, 1 PerfectInterpolantSequences, 0/608384 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/array1.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_09-17-31-411.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/array1.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_09-17-31-411.csv Completed graceful shutdown