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/const1.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-bd42740 [2018-09-23 21:24:25,371 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 21:24:25,373 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 21:24:25,392 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 21:24:25,392 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 21:24:25,393 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 21:24:25,395 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 21:24:25,397 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 21:24:25,400 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 21:24:25,401 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 21:24:25,410 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-23 21:24:25,410 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-23 21:24:25,411 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-23 21:24:25,415 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-23 21:24:25,418 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-23 21:24:25,418 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-23 21:24:25,419 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-23 21:24:25,421 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-23 21:24:25,423 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-23 21:24:25,424 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-23 21:24:25,425 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-23 21:24:25,426 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-23 21:24:25,428 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-23 21:24:25,436 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 21:24:25,450 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 21:24:25,451 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 21:24:25,451 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 21:24:25,452 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 21:24:25,452 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 21:24:25,452 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 21:24:25,453 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 21:24:25,453 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 21:24:25,453 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 21:24:25,453 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 21:24:25,454 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 21:24:25,454 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 21:24:25,454 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 21:24:25,454 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 21:24:25,454 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 21:24:25,455 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 21:24:25,455 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 21:24:25,455 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 21:24:25,455 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 21:24:25,455 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 21:24:25,456 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 21:24:25,456 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 21:24:25,456 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:24:25,456 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 21:24:25,456 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 21:24:25,457 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 21:24:25,457 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 21:24:25,457 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 21:24:25,457 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 21:24:25,457 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 21:24:25,508 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 21:24:25,521 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 21:24:25,528 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 21:24:25,530 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 21:24:25,531 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 21:24:25,532 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/const1.i_3.bpl [2018-09-23 21:24:25,533 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/const1.i_3.bpl' [2018-09-23 21:24:25,586 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 21:24:25,590 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 21:24:25,590 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 21:24:25,591 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 21:24:25,591 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 21:24:25,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:24:25" (1/1) ... [2018-09-23 21:24:25,625 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:24:25" (1/1) ... [2018-09-23 21:24:25,633 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 21:24:25,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 21:24:25,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 21:24:25,634 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 21:24:25,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:24:25" (1/1) ... [2018-09-23 21:24:25,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:24:25" (1/1) ... [2018-09-23 21:24:25,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:24:25" (1/1) ... [2018-09-23 21:24:25,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:24:25" (1/1) ... [2018-09-23 21:24:25,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:24:25" (1/1) ... [2018-09-23 21:24:25,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:24:25" (1/1) ... [2018-09-23 21:24:25,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:24:25" (1/1) ... [2018-09-23 21:24:25,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 21:24:25,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 21:24:25,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 21:24:25,654 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 21:24:25,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:24:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:24:25,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-23 21:24:25,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-23 21:24:25,963 INFO L354 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-23 21:24:25,964 INFO L202 PluginConnector]: Adding new model const1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:24:25 BoogieIcfgContainer [2018-09-23 21:24:25,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 21:24:25,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 21:24:25,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 21:24:25,971 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 21:24:25,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:24:25" (1/2) ... [2018-09-23 21:24:25,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b9891a and model type const1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 09:24:25, skipping insertion in model container [2018-09-23 21:24:25,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:24:25" (2/2) ... [2018-09-23 21:24:25,975 INFO L112 eAbstractionObserver]: Analyzing ICFG const1.i_3.bpl [2018-09-23 21:24:25,985 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 21:24:25,997 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 21:24:26,052 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 21:24:26,053 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 21:24:26,053 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 21:24:26,054 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 21:24:26,054 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 21:24:26,054 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 21:24:26,054 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 21:24:26,054 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 21:24:26,055 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 21:24:26,070 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-23 21:24:26,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 21:24:26,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:26,078 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-23 21:24:26,079 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:26,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:26,086 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-23 21:24:26,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:26,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:26,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:26,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:26,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:26,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:26,297 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:24:26,297 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 21:24:26,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 21:24:26,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 21:24:26,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:24:26,318 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-23 21:24:26,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:26,366 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-23 21:24:26,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 21:24:26,368 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-23 21:24:26,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:26,380 INFO L225 Difference]: With dead ends: 11 [2018-09-23 21:24:26,380 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 21:24:26,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:24:26,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 21:24:26,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 21:24:26,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 21:24:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-23 21:24:26,432 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-23 21:24:26,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:26,432 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-23 21:24:26,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 21:24:26,434 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-23 21:24:26,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 21:24:26,435 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:26,436 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-23 21:24:26,436 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:26,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:26,437 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-23 21:24:26,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:26,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:26,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:26,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:26,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:26,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:26,591 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:26,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:26,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:26,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:26,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:26,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-23 21:24:26,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 21:24:26,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 21:24:26,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:24:26,681 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-23 21:24:26,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:26,752 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-23 21:24:26,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 21:24:26,754 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-23 21:24:26,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:26,755 INFO L225 Difference]: With dead ends: 11 [2018-09-23 21:24:26,755 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 21:24:26,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:24:26,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 21:24:26,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 21:24:26,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 21:24:26,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-23 21:24:26,761 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-23 21:24:26,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:26,761 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-23 21:24:26,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 21:24:26,761 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-23 21:24:26,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 21:24:26,764 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:26,764 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-23 21:24:26,765 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:26,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:26,765 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-23 21:24:26,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:26,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:26,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:26,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:26,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:26,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:26,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:26,947 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:24:26,964 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:24:26,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:26,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:27,008 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:27,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 21:24:27,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 21:24:27,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 21:24:27,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:24:27,010 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-23 21:24:27,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:27,075 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-23 21:24:27,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 21:24:27,076 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-23 21:24:27,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:27,077 INFO L225 Difference]: With dead ends: 13 [2018-09-23 21:24:27,077 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 21:24:27,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:24:27,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 21:24:27,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 21:24:27,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 21:24:27,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-23 21:24:27,083 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-23 21:24:27,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:27,083 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-23 21:24:27,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 21:24:27,083 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-23 21:24:27,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 21:24:27,084 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:27,084 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-23 21:24:27,084 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:27,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:27,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-23 21:24:27,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:27,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:27,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:27,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:27,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:27,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:27,472 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:27,472 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:27,490 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:24:27,545 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-23 21:24:27,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:27,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:27,594 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:27,594 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 21:24:27,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 21:24:27,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 21:24:27,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:24:27,596 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-23 21:24:27,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:27,650 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-23 21:24:27,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 21:24:27,651 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-23 21:24:27,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:27,652 INFO L225 Difference]: With dead ends: 15 [2018-09-23 21:24:27,653 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 21:24:27,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:24:27,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 21:24:27,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 21:24:27,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 21:24:27,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-23 21:24:27,662 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-23 21:24:27,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:27,662 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-23 21:24:27,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 21:24:27,663 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-23 21:24:27,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 21:24:27,663 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:27,663 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-23 21:24:27,664 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:27,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:27,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-23 21:24:27,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:27,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:27,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:27,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:27,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:27,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:27,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:27,821 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:24:27,846 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:24:27,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:27,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:27,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:27,894 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 21:24:27,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 21:24:27,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 21:24:27,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:24:27,895 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-23 21:24:28,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:28,040 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-23 21:24:28,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 21:24:28,041 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-23 21:24:28,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:28,042 INFO L225 Difference]: With dead ends: 17 [2018-09-23 21:24:28,042 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 21:24:28,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:24:28,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 21:24:28,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-23 21:24:28,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 21:24:28,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-23 21:24:28,049 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-23 21:24:28,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:28,049 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-23 21:24:28,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 21:24:28,050 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-23 21:24:28,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 21:24:28,050 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:28,051 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-23 21:24:28,051 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:28,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:28,051 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-23 21:24:28,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:28,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:28,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:28,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:28,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:28,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:28,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:28,228 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:24:28,269 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-23 21:24:28,270 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:28,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:28,375 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:28,375 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 21:24:28,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 21:24:28,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 21:24:28,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:24:28,377 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-23 21:24:28,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:28,485 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-23 21:24:28,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 21:24:28,486 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-23 21:24:28,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:28,487 INFO L225 Difference]: With dead ends: 19 [2018-09-23 21:24:28,488 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 21:24:28,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:24:28,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 21:24:28,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-23 21:24:28,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-23 21:24:28,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-23 21:24:28,494 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-23 21:24:28,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:28,494 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-23 21:24:28,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 21:24:28,495 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-23 21:24:28,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 21:24:28,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:28,495 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-23 21:24:28,496 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:28,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:28,496 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-23 21:24:28,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:28,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:28,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:28,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:28,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:28,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:28,822 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:28,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:28,848 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:24:28,965 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 21:24:28,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:28,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:29,050 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:29,073 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:29,073 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 21:24:29,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 21:24:29,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 21:24:29,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:24:29,075 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-23 21:24:29,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:29,202 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-23 21:24:29,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:24:29,205 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-23 21:24:29,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:29,205 INFO L225 Difference]: With dead ends: 21 [2018-09-23 21:24:29,205 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 21:24:29,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:24:29,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 21:24:29,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 21:24:29,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 21:24:29,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-23 21:24:29,210 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-23 21:24:29,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:29,211 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-23 21:24:29,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 21:24:29,211 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-23 21:24:29,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:24:29,212 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:29,212 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-23 21:24:29,212 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:29,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:29,213 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-23 21:24:29,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:29,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:29,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:29,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:29,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:29,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:29,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:29,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:29,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:29,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:29,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 21:24:29,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:24:29,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:24:29,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:24:29,489 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-23 21:24:29,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:29,582 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-23 21:24:29,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 21:24:29,584 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-23 21:24:29,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:29,584 INFO L225 Difference]: With dead ends: 23 [2018-09-23 21:24:29,585 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 21:24:29,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:24:29,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 21:24:29,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 21:24:29,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 21:24:29,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-23 21:24:29,591 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-23 21:24:29,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:29,591 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-23 21:24:29,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:24:29,591 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-23 21:24:29,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 21:24:29,592 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:29,592 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-23 21:24:29,593 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:29,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:29,593 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-23 21:24:29,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:29,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:29,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:29,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:29,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:29,891 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:29,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:29,901 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:24:29,914 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:24:29,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:29,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:29,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:29,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 21:24:29,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 21:24:29,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 21:24:29,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:24:29,955 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-23 21:24:30,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:30,098 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-23 21:24:30,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 21:24:30,098 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-23 21:24:30,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:30,100 INFO L225 Difference]: With dead ends: 25 [2018-09-23 21:24:30,100 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 21:24:30,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:24:30,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 21:24:30,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 21:24:30,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 21:24:30,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-23 21:24:30,106 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-23 21:24:30,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:30,107 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-23 21:24:30,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 21:24:30,107 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-23 21:24:30,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 21:24:30,108 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:30,108 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-23 21:24:30,108 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:30,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:30,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-23 21:24:30,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:30,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:30,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:30,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:30,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:30,355 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:30,355 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:30,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:30,367 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:24:30,502 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-23 21:24:30,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:30,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:30,547 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:30,547 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 21:24:30,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:24:30,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:24:30,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:24:30,548 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-09-23 21:24:30,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:30,696 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-23 21:24:30,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 21:24:30,697 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-23 21:24:30,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:30,698 INFO L225 Difference]: With dead ends: 27 [2018-09-23 21:24:30,698 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 21:24:30,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:24:30,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 21:24:30,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 21:24:30,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 21:24:30,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-23 21:24:30,705 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-23 21:24:30,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:30,706 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-23 21:24:30,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:24:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-23 21:24:30,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 21:24:30,706 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:30,707 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-23 21:24:30,707 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:30,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:30,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-09-23 21:24:30,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:30,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:30,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:30,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:30,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:30,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:30,916 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:30,916 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:30,924 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:24:30,940 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:24:30,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:30,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:30,969 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:30,990 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:30,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 21:24:30,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:24:30,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:24:30,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:24:30,992 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-09-23 21:24:31,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:31,280 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-23 21:24:31,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 21:24:31,281 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-23 21:24:31,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:31,282 INFO L225 Difference]: With dead ends: 29 [2018-09-23 21:24:31,282 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 21:24:31,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:24:31,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 21:24:31,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 21:24:31,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 21:24:31,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-23 21:24:31,289 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-23 21:24:31,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:31,290 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-23 21:24:31,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:24:31,290 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-23 21:24:31,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 21:24:31,291 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:31,291 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-23 21:24:31,291 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:31,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:31,292 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-09-23 21:24:31,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:31,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:31,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:31,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:31,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:31,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:31,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:31,573 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:24:35,330 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-23 21:24:35,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:35,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:35,375 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:35,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:35,405 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 21:24:35,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:24:35,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:24:35,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:24:35,406 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-09-23 21:24:35,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:35,547 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-23 21:24:35,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 21:24:35,550 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-23 21:24:35,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:35,550 INFO L225 Difference]: With dead ends: 31 [2018-09-23 21:24:35,551 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 21:24:35,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:24:35,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 21:24:35,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 21:24:35,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 21:24:35,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-23 21:24:35,557 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-23 21:24:35,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:35,557 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-23 21:24:35,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:24:35,557 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-23 21:24:35,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 21:24:35,558 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:35,558 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-23 21:24:35,558 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:35,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:35,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-09-23 21:24:35,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:35,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:35,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:35,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:35,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:35,967 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:35,968 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:35,968 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:35,976 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:24:36,089 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 21:24:36,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:36,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:36,130 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:36,161 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:36,161 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 21:24:36,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:24:36,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:24:36,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:24:36,162 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-09-23 21:24:36,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:36,551 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-23 21:24:36,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 21:24:36,551 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-23 21:24:36,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:36,552 INFO L225 Difference]: With dead ends: 33 [2018-09-23 21:24:36,552 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 21:24:36,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:24:36,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 21:24:36,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 21:24:36,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 21:24:36,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-23 21:24:36,559 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-23 21:24:36,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:36,559 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-23 21:24:36,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:24:36,560 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-23 21:24:36,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 21:24:36,560 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:36,561 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-23 21:24:36,561 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:36,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:36,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-09-23 21:24:36,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:36,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:36,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:36,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:36,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:36,880 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:36,880 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:36,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:36,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:36,917 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:36,938 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:36,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 21:24:36,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:24:36,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:24:36,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:24:36,939 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-09-23 21:24:37,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:37,099 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-23 21:24:37,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 21:24:37,100 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-23 21:24:37,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:37,101 INFO L225 Difference]: With dead ends: 35 [2018-09-23 21:24:37,101 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 21:24:37,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:24:37,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 21:24:37,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 21:24:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 21:24:37,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-23 21:24:37,108 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-23 21:24:37,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:37,109 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-23 21:24:37,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:24:37,109 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-23 21:24:37,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 21:24:37,110 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:37,110 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-23 21:24:37,110 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:37,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:37,111 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-09-23 21:24:37,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:37,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:37,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:37,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:37,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:37,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:37,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:37,537 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:24:37,592 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:24:37,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:37,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:37,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:37,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 21:24:37,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 21:24:37,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 21:24:37,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:24:37,710 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-09-23 21:24:38,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:38,168 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-23 21:24:38,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 21:24:38,169 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-23 21:24:38,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:38,170 INFO L225 Difference]: With dead ends: 37 [2018-09-23 21:24:38,170 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 21:24:38,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:24:38,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 21:24:38,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 21:24:38,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 21:24:38,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-23 21:24:38,178 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-23 21:24:38,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:38,178 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-23 21:24:38,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 21:24:38,179 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-23 21:24:38,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 21:24:38,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:38,180 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-23 21:24:38,180 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:38,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:38,181 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-09-23 21:24:38,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:38,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:38,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:38,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:38,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:38,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:38,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:38,549 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:24:38,883 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-23 21:24:38,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:38,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:38,905 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:38,927 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:38,927 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 21:24:38,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:24:38,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:24:38,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:24:38,928 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-09-23 21:24:39,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:39,191 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-23 21:24:39,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 21:24:39,191 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-23 21:24:39,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:39,192 INFO L225 Difference]: With dead ends: 39 [2018-09-23 21:24:39,192 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 21:24:39,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:24:39,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 21:24:39,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 21:24:39,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 21:24:39,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-23 21:24:39,199 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-23 21:24:39,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:39,199 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-23 21:24:39,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:24:39,199 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-23 21:24:39,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 21:24:39,201 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:39,201 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-23 21:24:39,201 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:39,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:39,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-09-23 21:24:39,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:39,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:39,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:39,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:39,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:39,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:39,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:39,734 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:24:39,750 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:24:39,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:39,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:39,809 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:39,809 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 21:24:39,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 21:24:39,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 21:24:39,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:24:39,810 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-09-23 21:24:40,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:40,185 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-23 21:24:40,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 21:24:40,192 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-23 21:24:40,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:40,192 INFO L225 Difference]: With dead ends: 41 [2018-09-23 21:24:40,192 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 21:24:40,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:24:40,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 21:24:40,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 21:24:40,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 21:24:40,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-23 21:24:40,201 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-23 21:24:40,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:40,201 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-23 21:24:40,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 21:24:40,202 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-23 21:24:40,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 21:24:40,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:40,203 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-23 21:24:40,203 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:40,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:40,203 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-09-23 21:24:40,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:40,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:40,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:40,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:40,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:40,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:40,917 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:40,917 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:40,925 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:25:11,770 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-23 21:25:11,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:11,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:11,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:11,868 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 21:25:11,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:25:11,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:25:11,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:25:11,870 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-09-23 21:25:12,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:12,167 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-23 21:25:12,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 21:25:12,168 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-23 21:25:12,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:12,169 INFO L225 Difference]: With dead ends: 43 [2018-09-23 21:25:12,169 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 21:25:12,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:25:12,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 21:25:12,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 21:25:12,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 21:25:12,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-23 21:25:12,177 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-23 21:25:12,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:12,178 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-23 21:25:12,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:25:12,178 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-23 21:25:12,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 21:25:12,179 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:12,179 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-09-23 21:25:12,179 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:12,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:12,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-09-23 21:25:12,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:12,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:12,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:12,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:12,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:12,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:12,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:12,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:12,566 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:25:22,626 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 21:25:22,626 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:22,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:22,698 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:22,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 21:25:22,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 21:25:22,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 21:25:22,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:25:22,700 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-09-23 21:25:23,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:23,457 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-23 21:25:23,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 21:25:23,458 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-23 21:25:23,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:23,459 INFO L225 Difference]: With dead ends: 45 [2018-09-23 21:25:23,459 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 21:25:23,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:25:23,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 21:25:23,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 21:25:23,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 21:25:23,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-23 21:25:23,466 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-23 21:25:23,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:23,467 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-23 21:25:23,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 21:25:23,467 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-23 21:25:23,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 21:25:23,468 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:23,468 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-23 21:25:23,468 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:23,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:23,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-09-23 21:25:23,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:23,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:23,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:23,470 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:23,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:23,902 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:23,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:23,902 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:23,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:23,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:23,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:23,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 21:25:23,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 21:25:23,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 21:25:23,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:25:23,994 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-09-23 21:25:24,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:24,465 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-23 21:25:24,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 21:25:24,465 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-23 21:25:24,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:24,466 INFO L225 Difference]: With dead ends: 47 [2018-09-23 21:25:24,466 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 21:25:24,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:25:24,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 21:25:24,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 21:25:24,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 21:25:24,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-23 21:25:24,474 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-23 21:25:24,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:24,474 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-23 21:25:24,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 21:25:24,475 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-23 21:25:24,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 21:25:24,475 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:24,475 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-09-23 21:25:24,476 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:24,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:24,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-09-23 21:25:24,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:24,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:24,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:24,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:24,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:25,053 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:25,053 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:25,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:25,067 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:25:25,089 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:25:25,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:25,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:25,115 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:25,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:25,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 21:25:25,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 21:25:25,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 21:25:25,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:25:25,136 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-09-23 21:25:25,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:25,534 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-23 21:25:25,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:25:25,534 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-23 21:25:25,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:25,535 INFO L225 Difference]: With dead ends: 49 [2018-09-23 21:25:25,535 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 21:25:25,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:25:25,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 21:25:25,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 21:25:25,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 21:25:25,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-23 21:25:25,543 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-23 21:25:25,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:25,543 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-23 21:25:25,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 21:25:25,543 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-23 21:25:25,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 21:25:25,547 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:25,547 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-23 21:25:25,547 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:25,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:25,547 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-09-23 21:25:25,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:25,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:25,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:25,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:25,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:26,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:26,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:26,033 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:25:34,165 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-23 21:25:34,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:34,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:34,209 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:34,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:34,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 21:25:34,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 21:25:34,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 21:25:34,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:25:34,233 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-09-23 21:25:34,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:34,575 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-23 21:25:34,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 21:25:34,578 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-23 21:25:34,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:34,579 INFO L225 Difference]: With dead ends: 51 [2018-09-23 21:25:34,579 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 21:25:34,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:25:34,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 21:25:34,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 21:25:34,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 21:25:34,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-23 21:25:34,585 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-23 21:25:34,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:34,585 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-23 21:25:34,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 21:25:34,585 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-23 21:25:34,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 21:25:34,586 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:34,586 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-09-23 21:25:34,586 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:34,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:34,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-09-23 21:25:34,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:34,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:34,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:34,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:34,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:35,701 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:35,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:35,709 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:25:35,752 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:25:35,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:35,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:35,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:35,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 21:25:35,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 21:25:35,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 21:25:35,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:25:35,796 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-09-23 21:25:36,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:36,233 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-23 21:25:36,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 21:25:36,234 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-23 21:25:36,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:36,234 INFO L225 Difference]: With dead ends: 53 [2018-09-23 21:25:36,235 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 21:25:36,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:25:36,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 21:25:36,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 21:25:36,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 21:25:36,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-23 21:25:36,242 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-23 21:25:36,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:36,242 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-23 21:25:36,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 21:25:36,242 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-23 21:25:36,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 21:25:36,243 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:36,243 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-23 21:25:36,243 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:36,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:36,244 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-09-23 21:25:36,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:36,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:36,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:36,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:36,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:36,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:36,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:36,776 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:26:50,010 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-23 21:26:50,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:50,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:50,424 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:50,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:50,457 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 21:26:50,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 21:26:50,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 21:26:50,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:26:50,458 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-09-23 21:26:50,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:50,982 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-23 21:26:50,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 21:26:50,983 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-23 21:26:50,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:50,984 INFO L225 Difference]: With dead ends: 55 [2018-09-23 21:26:50,984 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 21:26:50,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:26:50,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 21:26:50,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 21:26:50,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 21:26:50,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-23 21:26:50,992 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-23 21:26:50,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:50,992 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-23 21:26:50,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 21:26:50,992 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-23 21:26:50,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 21:26:50,993 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:50,993 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-09-23 21:26:50,993 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:50,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:50,994 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-09-23 21:26:50,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:50,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:50,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:50,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:50,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:51,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:51,654 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:51,654 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:51,661 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:27:15,119 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 21:27:15,119 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:15,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:15,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:15,192 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 21:27:15,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 21:27:15,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 21:27:15,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:27:15,193 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-09-23 21:27:15,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:15,669 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-23 21:27:15,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 21:27:15,670 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-23 21:27:15,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:15,671 INFO L225 Difference]: With dead ends: 57 [2018-09-23 21:27:15,671 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 21:27:15,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:27:15,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 21:27:15,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 21:27:15,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 21:27:15,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-23 21:27:15,678 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-23 21:27:15,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:15,678 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-23 21:27:15,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 21:27:15,678 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-23 21:27:15,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 21:27:15,679 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:15,679 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-09-23 21:27:15,679 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:15,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:15,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-09-23 21:27:15,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:15,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:15,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:15,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:15,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:16,382 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:16,382 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:16,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:27:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:16,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:16,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:16,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 21:27:16,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 21:27:16,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 21:27:16,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:27:16,459 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-09-23 21:27:16,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:16,933 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-23 21:27:16,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 21:27:16,933 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-23 21:27:16,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:16,934 INFO L225 Difference]: With dead ends: 59 [2018-09-23 21:27:16,934 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 21:27:16,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:27:16,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 21:27:16,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-23 21:27:16,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 21:27:16,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-23 21:27:16,940 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-23 21:27:16,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:16,940 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-23 21:27:16,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 21:27:16,940 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-23 21:27:16,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 21:27:16,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:16,941 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-09-23 21:27:16,941 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:16,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:16,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-09-23 21:27:16,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:16,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:16,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:16,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:27:16,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:18,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:18,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:18,711 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:27:18,737 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:27:18,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:18,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:18,774 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:18,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:18,797 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 21:27:18,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 21:27:18,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 21:27:18,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:27:18,798 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-09-23 21:27:19,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:19,304 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-23 21:27:19,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 21:27:19,305 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-23 21:27:19,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:19,306 INFO L225 Difference]: With dead ends: 61 [2018-09-23 21:27:19,306 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 21:27:19,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:27:19,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 21:27:19,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 21:27:19,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 21:27:19,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-23 21:27:19,312 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-23 21:27:19,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:19,312 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-23 21:27:19,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 21:27:19,312 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-23 21:27:19,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 21:27:19,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:19,313 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-09-23 21:27:19,313 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:19,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:19,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-09-23 21:27:19,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:19,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:19,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:19,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:19,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:19,863 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:19,863 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:19,864 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:19,873 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:27:29,303 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-23 21:27:29,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:29,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:29,595 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:29,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 21:27:29,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 21:27:29,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 21:27:29,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:27:29,597 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-09-23 21:27:30,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:30,147 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-23 21:27:30,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 21:27:30,147 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-23 21:27:30,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:30,148 INFO L225 Difference]: With dead ends: 63 [2018-09-23 21:27:30,149 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 21:27:30,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:27:30,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 21:27:30,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 21:27:30,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 21:27:30,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-23 21:27:30,154 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-23 21:27:30,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:30,154 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-23 21:27:30,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 21:27:30,154 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-23 21:27:30,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 21:27:30,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:30,155 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-09-23 21:27:30,156 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:30,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:30,156 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-09-23 21:27:30,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:30,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:30,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:30,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:30,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:30,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:30,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:30,714 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:27:30,739 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:27:30,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:30,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:30,792 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:30,792 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 21:27:30,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 21:27:30,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 21:27:30,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:27:30,793 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-09-23 21:27:31,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:31,389 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-23 21:27:31,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 21:27:31,390 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-23 21:27:31,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:31,391 INFO L225 Difference]: With dead ends: 65 [2018-09-23 21:27:31,391 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 21:27:31,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:27:31,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 21:27:31,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-23 21:27:31,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 21:27:31,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-23 21:27:31,396 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-23 21:27:31,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:31,396 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-23 21:27:31,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 21:27:31,396 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-23 21:27:31,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 21:27:31,397 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:31,397 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-09-23 21:27:31,397 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:31,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:31,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-09-23 21:27:31,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:31,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:31,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:31,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:31,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:32,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:32,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:32,062 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown