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/count_by_2.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-133090d [2018-10-04 09:16:02,572 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 09:16:02,574 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 09:16:02,586 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 09:16:02,586 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 09:16:02,588 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 09:16:02,590 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 09:16:02,593 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 09:16:02,595 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 09:16:02,598 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 09:16:02,600 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 09:16:02,601 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 09:16:02,602 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 09:16:02,603 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 09:16:02,604 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 09:16:02,607 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 09:16:02,608 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 09:16:02,610 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 09:16:02,620 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 09:16:02,623 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 09:16:02,625 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 09:16:02,626 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 09:16:02,628 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-04 09:16:02,636 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-04 09:16:02,660 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 09:16:02,661 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 09:16:02,662 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 09:16:02,662 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 09:16:02,666 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 09:16:02,666 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 09:16:02,666 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 09:16:02,666 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 09:16:02,667 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 09:16:02,667 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 09:16:02,667 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 09:16:02,667 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 09:16:02,667 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 09:16:02,668 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 09:16:02,669 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 09:16:02,669 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 09:16:02,669 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 09:16:02,669 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 09:16:02,670 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 09:16:02,671 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 09:16:02,671 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 09:16:02,671 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 09:16:02,671 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:16:02,672 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 09:16:02,672 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 09:16:02,672 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 09:16:02,672 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 09:16:02,673 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 09:16:02,674 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 09:16:02,674 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 09:16:02,726 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 09:16:02,743 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 09:16:02,750 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 09:16:02,752 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 09:16:02,752 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 09:16:02,753 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_2.i_3.bpl [2018-10-04 09:16:02,753 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_2.i_3.bpl' [2018-10-04 09:16:02,812 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 09:16:02,814 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 09:16:02,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 09:16:02,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 09:16:02,816 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 09:16:02,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:16:02" (1/1) ... [2018-10-04 09:16:02,850 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:16:02" (1/1) ... [2018-10-04 09:16:02,858 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 09:16:02,859 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 09:16:02,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 09:16:02,859 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 09:16:02,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:16:02" (1/1) ... [2018-10-04 09:16:02,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:16:02" (1/1) ... [2018-10-04 09:16:02,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:16:02" (1/1) ... [2018-10-04 09:16:02,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:16:02" (1/1) ... [2018-10-04 09:16:02,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:16:02" (1/1) ... [2018-10-04 09:16:02,879 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:16:02" (1/1) ... [2018-10-04 09:16:02,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:16:02" (1/1) ... [2018-10-04 09:16:02,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 09:16:02,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 09:16:02,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 09:16:02,883 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 09:16:02,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:16:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:16:02,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 09:16:02,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 09:16:03,176 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 09:16:03,177 INFO L202 PluginConnector]: Adding new model count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:16:03 BoogieIcfgContainer [2018-10-04 09:16:03,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 09:16:03,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 09:16:03,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 09:16:03,182 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 09:16:03,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:16:02" (1/2) ... [2018-10-04 09:16:03,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@138a4ced and model type count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 09:16:03, skipping insertion in model container [2018-10-04 09:16:03,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:16:03" (2/2) ... [2018-10-04 09:16:03,185 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_2.i_3.bpl [2018-10-04 09:16:03,195 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 09:16:03,203 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 09:16:03,249 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 09:16:03,250 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 09:16:03,250 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 09:16:03,250 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 09:16:03,250 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 09:16:03,250 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 09:16:03,251 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 09:16:03,251 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 09:16:03,251 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 09:16:03,266 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-04 09:16:03,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 09:16:03,273 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:03,274 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 09:16:03,275 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:03,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:03,281 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-04 09:16:03,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:03,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:03,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:03,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:03,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:03,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:03,427 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:16:03,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 09:16:03,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:16:03,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:16:03,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:16:03,449 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-04 09:16:03,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:03,498 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-04 09:16:03,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:16:03,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-04 09:16:03,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:03,511 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:16:03,512 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 09:16:03,515 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:16:03,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 09:16:03,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 09:16:03,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 09:16:03,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 09:16:03,551 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-04 09:16:03,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:03,552 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 09:16:03,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:16:03,552 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 09:16:03,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 09:16:03,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:03,553 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-04 09:16:03,553 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:03,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:03,554 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-04 09:16:03,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:03,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:03,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:03,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:03,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:03,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:03,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:03,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:03,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:03,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:03,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:03,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:03,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:03,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 09:16:03,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 09:16:03,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 09:16:03,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:16:03,785 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-10-04 09:16:03,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:03,844 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 09:16:03,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:16:03,845 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 09:16:03,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:03,846 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:16:03,846 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 09:16:03,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:16:03,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 09:16:03,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 09:16:03,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 09:16:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 09:16:03,851 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-04 09:16:03,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:03,851 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 09:16:03,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 09:16:03,851 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 09:16:03,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 09:16:03,852 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:03,852 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-04 09:16:03,852 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:03,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:03,853 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-10-04 09:16:03,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:03,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:03,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:03,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:03,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:03,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:03,962 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:03,963 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:03,972 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:16:03,993 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:16:03,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:03,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:04,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:04,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 09:16:04,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 09:16:04,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 09:16:04,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:16:04,024 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-10-04 09:16:04,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:04,048 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 09:16:04,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:16:04,049 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 09:16:04,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:04,050 INFO L225 Difference]: With dead ends: 13 [2018-10-04 09:16:04,050 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 09:16:04,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:16:04,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 09:16:04,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 09:16:04,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 09:16:04,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 09:16:04,057 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-04 09:16:04,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:04,059 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 09:16:04,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 09:16:04,059 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 09:16:04,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 09:16:04,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:04,060 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-04 09:16:04,061 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:04,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:04,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-10-04 09:16:04,062 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:04,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:04,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:04,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:04,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:04,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:04,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:04,197 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:16:04,226 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 09:16:04,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:04,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:04,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:04,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 09:16:04,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:16:04,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:16:04,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:16:04,255 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-10-04 09:16:04,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:04,290 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 09:16:04,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:16:04,291 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-04 09:16:04,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:04,292 INFO L225 Difference]: With dead ends: 15 [2018-10-04 09:16:04,293 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 09:16:04,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:16:04,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 09:16:04,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 09:16:04,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 09:16:04,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 09:16:04,297 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-04 09:16:04,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:04,298 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 09:16:04,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:16:04,298 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 09:16:04,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 09:16:04,299 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:04,299 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-04 09:16:04,299 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:04,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:04,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-10-04 09:16:04,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:04,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:04,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:04,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:04,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:04,586 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:04,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:04,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:04,608 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:16:04,650 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:16:04,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:04,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:04,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:04,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:16:04,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:16:04,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:16:04,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:16:04,701 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-10-04 09:16:04,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:04,744 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 09:16:04,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:16:04,745 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-04 09:16:04,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:04,746 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:16:04,746 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 09:16:04,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:16:04,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 09:16:04,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 09:16:04,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 09:16:04,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 09:16:04,751 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-04 09:16:04,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:04,753 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 09:16:04,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:16:04,753 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 09:16:04,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 09:16:04,754 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:04,754 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-04 09:16:04,754 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:04,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:04,756 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-10-04 09:16:04,756 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:04,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:04,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:04,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:04,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:04,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:04,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:04,919 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:16:04,938 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 09:16:04,938 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:04,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:04,970 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:04,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:16:04,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:16:04,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:16:04,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:16:04,972 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-10-04 09:16:05,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:05,034 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 09:16:05,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:16:05,038 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-04 09:16:05,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:05,039 INFO L225 Difference]: With dead ends: 19 [2018-10-04 09:16:05,039 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 09:16:05,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:16:05,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 09:16:05,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 09:16:05,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 09:16:05,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 09:16:05,044 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-04 09:16:05,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:05,044 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 09:16:05,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:16:05,045 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 09:16:05,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 09:16:05,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:05,046 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-04 09:16:05,046 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:05,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:05,046 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-10-04 09:16:05,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:05,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:05,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:05,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:05,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:05,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:05,253 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:05,268 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:16:05,284 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:16:05,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:05,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:05,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:05,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:16:05,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:16:05,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:16:05,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:16:05,324 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-10-04 09:16:05,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:05,370 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 09:16:05,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:16:05,371 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-04 09:16:05,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:05,371 INFO L225 Difference]: With dead ends: 21 [2018-10-04 09:16:05,372 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 09:16:05,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:16:05,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 09:16:05,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 09:16:05,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 09:16:05,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 09:16:05,377 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-04 09:16:05,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:05,378 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 09:16:05,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:16:05,378 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 09:16:05,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 09:16:05,379 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:05,379 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-04 09:16:05,379 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:05,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:05,379 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-10-04 09:16:05,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:05,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:05,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:05,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:05,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:05,499 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:05,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:05,499 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:05,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:05,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:05,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:05,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:16:05,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:16:05,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:16:05,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:16:05,576 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-10-04 09:16:05,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:05,815 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 09:16:05,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:16:05,815 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-04 09:16:05,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:05,816 INFO L225 Difference]: With dead ends: 23 [2018-10-04 09:16:05,816 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 09:16:05,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:16:05,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 09:16:05,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 09:16:05,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 09:16:05,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 09:16:05,823 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-04 09:16:05,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:05,823 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 09:16:05,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:16:05,824 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 09:16:05,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 09:16:05,824 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:05,826 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-04 09:16:05,827 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:05,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:05,827 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-10-04 09:16:05,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:05,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:05,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:05,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:05,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:05,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:05,992 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 [2018-10-04 09:16:06,002 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:16:06,011 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:16:06,012 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:06,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:06,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:06,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:16:06,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:16:06,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:16:06,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:16:06,055 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-10-04 09:16:06,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:06,093 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 09:16:06,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:16:06,094 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-04 09:16:06,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:06,094 INFO L225 Difference]: With dead ends: 25 [2018-10-04 09:16:06,095 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 09:16:06,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:16:06,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 09:16:06,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 09:16:06,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 09:16:06,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 09:16:06,099 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-04 09:16:06,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:06,099 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 09:16:06,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:16:06,100 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 09:16:06,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 09:16:06,100 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:06,101 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-04 09:16:06,101 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:06,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:06,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-10-04 09:16:06,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:06,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:06,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:06,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:06,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:06,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:06,271 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:06,281 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:16:06,375 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-04 09:16:06,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:06,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:06,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:06,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 09:16:06,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 09:16:06,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 09:16:06,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:16:06,409 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-10-04 09:16:06,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:06,456 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 09:16:06,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 09:16:06,457 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-04 09:16:06,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:06,458 INFO L225 Difference]: With dead ends: 27 [2018-10-04 09:16:06,458 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 09:16:06,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:16:06,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 09:16:06,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 09:16:06,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 09:16:06,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 09:16:06,462 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-10-04 09:16:06,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:06,463 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 09:16:06,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 09:16:06,463 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 09:16:06,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 09:16:06,463 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:06,464 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-10-04 09:16:06,464 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:06,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:06,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-10-04 09:16:06,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:06,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:06,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:06,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:06,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:06,741 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:06,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:06,742 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:06,749 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:16:06,761 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:16:06,761 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:06,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:06,794 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:06,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 09:16:06,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 09:16:06,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 09:16:06,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 09:16:06,795 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-10-04 09:16:06,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:06,839 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 09:16:06,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 09:16:06,839 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-04 09:16:06,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:06,841 INFO L225 Difference]: With dead ends: 29 [2018-10-04 09:16:06,841 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 09:16:06,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 09:16:06,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 09:16:06,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 09:16:06,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 09:16:06,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 09:16:06,846 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-10-04 09:16:06,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:06,847 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 09:16:06,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 09:16:06,847 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 09:16:06,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 09:16:06,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:06,848 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-04 09:16:06,848 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:06,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:06,849 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-10-04 09:16:06,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:06,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:06,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:06,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:06,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:06,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:07,070 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:07,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:07,071 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:07,078 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:16:07,090 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 09:16:07,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:07,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:07,104 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:07,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:07,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 09:16:07,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:16:07,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:16:07,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:16:07,129 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-10-04 09:16:07,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:07,336 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 09:16:07,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 09:16:07,338 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-04 09:16:07,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:07,339 INFO L225 Difference]: With dead ends: 31 [2018-10-04 09:16:07,339 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 09:16:07,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:16:07,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 09:16:07,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 09:16:07,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 09:16:07,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 09:16:07,347 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-10-04 09:16:07,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:07,348 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 09:16:07,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:16:07,348 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 09:16:07,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 09:16:07,349 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:07,349 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-10-04 09:16:07,349 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:07,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:07,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-10-04 09:16:07,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:07,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:07,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:07,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:07,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:07,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:07,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:07,640 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:16:07,655 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 09:16:07,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:07,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:07,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:07,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 09:16:07,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 09:16:07,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 09:16:07,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 09:16:07,700 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-10-04 09:16:07,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:07,755 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 09:16:07,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 09:16:07,755 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-04 09:16:07,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:07,756 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:16:07,756 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 09:16:07,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 09:16:07,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 09:16:07,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 09:16:07,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 09:16:07,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 09:16:07,761 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-10-04 09:16:07,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:07,762 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 09:16:07,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 09:16:07,762 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 09:16:07,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 09:16:07,763 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:07,763 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-04 09:16:07,763 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:07,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:07,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-10-04 09:16:07,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:07,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:07,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:07,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:07,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:08,039 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:08,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:08,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:08,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:08,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:08,097 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:08,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 09:16:08,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 09:16:08,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 09:16:08,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:16:08,099 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-10-04 09:16:08,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:08,145 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 09:16:08,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 09:16:08,146 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-04 09:16:08,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:08,147 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:16:08,147 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 09:16:08,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:16:08,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 09:16:08,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 09:16:08,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 09:16:08,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 09:16:08,153 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-10-04 09:16:08,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:08,153 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 09:16:08,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 09:16:08,153 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 09:16:08,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 09:16:08,154 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:08,154 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-10-04 09:16:08,155 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:08,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:08,155 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-10-04 09:16:08,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:08,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:08,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:08,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:08,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:08,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:08,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:08,387 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:16:08,430 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:16:08,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:08,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:08,444 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:08,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:08,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 09:16:08,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 09:16:08,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 09:16:08,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:16:08,471 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-10-04 09:16:08,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:08,509 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 09:16:08,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 09:16:08,509 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-04 09:16:08,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:08,510 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:16:08,510 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:16:08,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:16:08,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:16:08,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 09:16:08,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 09:16:08,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 09:16:08,515 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-10-04 09:16:08,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:08,516 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 09:16:08,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 09:16:08,516 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 09:16:08,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 09:16:08,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:08,517 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-04 09:16:08,517 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:08,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:08,518 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-10-04 09:16:08,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:08,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:08,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:08,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:08,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:08,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:08,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:08,770 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:08,779 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:16:08,794 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-04 09:16:08,794 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:08,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:08,830 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:08,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 09:16:08,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 09:16:08,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 09:16:08,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:16:08,832 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-10-04 09:16:08,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:08,890 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 09:16:08,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 09:16:08,892 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-04 09:16:08,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:08,892 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:16:08,892 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:16:08,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:16:08,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:16:08,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 09:16:08,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 09:16:08,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-04 09:16:08,898 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-10-04 09:16:08,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:08,898 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-04 09:16:08,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 09:16:08,898 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-04 09:16:08,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 09:16:08,899 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:08,899 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-10-04 09:16:08,900 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:08,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:08,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-10-04 09:16:08,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:08,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:08,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:08,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:08,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:08,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:09,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:09,113 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:09,121 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:16:09,162 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:16:09,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:09,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:09,177 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:09,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:09,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 09:16:09,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 09:16:09,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 09:16:09,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 09:16:09,209 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-10-04 09:16:09,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:09,285 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 09:16:09,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 09:16:09,285 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-04 09:16:09,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:09,286 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:16:09,286 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:16:09,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 09:16:09,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:16:09,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 09:16:09,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 09:16:09,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 09:16:09,292 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-10-04 09:16:09,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:09,293 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 09:16:09,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 09:16:09,293 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 09:16:09,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 09:16:09,293 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:09,294 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-10-04 09:16:09,294 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:09,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:09,294 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-10-04 09:16:09,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:09,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:09,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:09,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:09,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:09,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:09,858 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:09,865 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:16:09,898 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-04 09:16:09,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:09,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:09,942 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:09,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 09:16:09,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:16:09,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:16:09,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:16:09,944 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-10-04 09:16:10,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:10,048 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 09:16:10,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 09:16:10,048 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-04 09:16:10,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:10,049 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:16:10,049 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:16:10,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:16:10,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:16:10,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 09:16:10,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 09:16:10,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-04 09:16:10,056 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-10-04 09:16:10,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:10,057 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-04 09:16:10,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:16:10,057 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-04 09:16:10,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 09:16:10,058 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:10,058 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-10-04 09:16:10,058 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:10,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:10,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-10-04 09:16:10,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:10,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:10,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:10,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:10,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:10,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:10,351 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:10,358 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:16:10,426 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 09:16:10,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:10,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:10,442 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:10,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:10,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 09:16:10,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 09:16:10,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 09:16:10,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 09:16:10,468 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-10-04 09:16:10,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:10,564 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 09:16:10,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 09:16:10,564 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-04 09:16:10,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:10,565 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:16:10,566 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:16:10,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 09:16:10,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:16:10,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 09:16:10,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 09:16:10,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-04 09:16:10,571 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-10-04 09:16:10,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:10,571 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-04 09:16:10,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 09:16:10,571 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-04 09:16:10,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 09:16:10,572 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:10,572 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-10-04 09:16:10,573 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:10,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:10,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-10-04 09:16:10,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:10,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:10,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:10,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:10,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:10,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:10,817 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:10,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:10,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:10,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:10,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:10,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 09:16:10,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 09:16:10,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 09:16:10,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:16:10,878 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-10-04 09:16:10,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:10,963 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-04 09:16:10,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 09:16:10,963 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-04 09:16:10,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:10,964 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:16:10,964 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:16:10,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:16:10,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:16:10,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 09:16:10,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 09:16:10,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-04 09:16:10,970 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-10-04 09:16:10,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:10,971 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-04 09:16:10,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 09:16:10,971 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-04 09:16:10,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 09:16:10,972 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:10,972 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-10-04 09:16:10,972 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:10,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:10,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-10-04 09:16:10,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:10,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:10,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:10,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:10,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:11,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:11,660 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:11,673 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:16:11,688 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:16:11,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:11,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:11,705 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:11,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:11,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 09:16:11,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 09:16:11,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 09:16:11,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:16:11,738 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-10-04 09:16:11,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:11,940 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 09:16:11,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 09:16:11,941 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-04 09:16:11,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:11,941 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:16:11,941 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:16:11,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:16:11,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:16:11,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 09:16:11,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 09:16:11,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-04 09:16:11,947 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-10-04 09:16:11,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:11,947 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-04 09:16:11,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 09:16:11,947 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-04 09:16:11,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 09:16:11,948 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:11,948 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-10-04 09:16:11,948 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:11,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:11,948 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-10-04 09:16:11,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:11,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:11,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:11,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:11,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:12,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:12,327 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:12,335 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:16:12,359 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-04 09:16:12,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:12,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:12,374 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:12,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:12,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 09:16:12,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 09:16:12,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 09:16:12,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:16:12,405 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-10-04 09:16:12,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:12,679 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-04 09:16:12,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 09:16:12,683 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-04 09:16:12,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:12,683 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:16:12,683 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:16:12,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:16:12,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:16:12,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 09:16:12,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 09:16:12,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-04 09:16:12,688 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-10-04 09:16:12,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:12,688 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-04 09:16:12,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 09:16:12,688 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-04 09:16:12,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 09:16:12,689 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:12,689 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-10-04 09:16:12,689 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:12,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:12,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-10-04 09:16:12,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:12,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:12,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:12,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:12,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:13,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:13,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:13,150 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:16:13,165 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:16:13,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:13,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:13,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:13,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 09:16:13,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 09:16:13,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 09:16:13,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 09:16:13,207 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-10-04 09:16:13,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:13,270 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 09:16:13,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 09:16:13,270 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-04 09:16:13,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:13,271 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:16:13,272 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:16:13,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 09:16:13,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:16:13,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 09:16:13,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 09:16:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-04 09:16:13,278 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-10-04 09:16:13,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:13,278 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-04 09:16:13,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 09:16:13,278 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-04 09:16:13,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 09:16:13,279 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:13,279 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-10-04 09:16:13,279 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:13,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:13,280 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-10-04 09:16:13,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:13,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:13,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:13,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:13,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:13,780 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:13,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:13,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:13,787 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:16:13,807 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-04 09:16:13,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:13,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:13,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:13,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 09:16:13,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 09:16:13,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 09:16:13,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:16:13,855 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-10-04 09:16:14,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:14,024 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-04 09:16:14,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 09:16:14,025 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-04 09:16:14,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:14,026 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:16:14,026 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:16:14,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:16:14,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:16:14,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 09:16:14,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 09:16:14,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-04 09:16:14,032 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-10-04 09:16:14,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:14,032 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-04 09:16:14,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 09:16:14,032 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-04 09:16:14,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 09:16:14,033 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:14,033 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-10-04 09:16:14,033 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:14,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:14,033 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-10-04 09:16:14,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:14,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:14,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:14,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:14,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:14,688 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:14,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:14,697 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:16:14,762 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 09:16:14,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:14,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:14,803 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:14,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 09:16:14,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 09:16:14,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 09:16:14,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 09:16:14,804 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-10-04 09:16:14,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:14,859 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 09:16:14,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 09:16:14,860 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-04 09:16:14,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:14,861 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:16:14,861 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:16:14,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 09:16:14,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:16:14,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 09:16:14,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 09:16:14,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-04 09:16:14,865 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-10-04 09:16:14,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:14,865 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-04 09:16:14,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 09:16:14,866 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-04 09:16:14,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 09:16:14,866 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:14,866 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-10-04 09:16:14,866 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:14,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:14,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-10-04 09:16:14,867 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:14,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:14,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:14,868 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:14,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:15,332 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:15,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:15,332 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:15,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:15,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:15,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:15,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 09:16:15,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 09:16:15,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 09:16:15,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:16:15,397 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-10-04 09:16:15,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:15,443 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-04 09:16:15,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 09:16:15,443 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-04 09:16:15,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:15,444 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:16:15,444 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 09:16:15,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:16:15,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 09:16:15,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 09:16:15,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 09:16:15,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-04 09:16:15,449 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-10-04 09:16:15,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:15,449 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-04 09:16:15,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 09:16:15,449 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-04 09:16:15,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 09:16:15,450 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:15,450 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-10-04 09:16:15,450 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:15,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:15,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-10-04 09:16:15,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:15,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:15,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:15,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:15,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:16,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:16,273 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 [2018-10-04 09:16:16,286 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:16:16,305 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:16:16,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:16,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:16,319 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:16,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:16,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 09:16:16,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 09:16:16,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 09:16:16,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:16:16,349 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-10-04 09:16:16,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:16,428 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 09:16:16,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 09:16:16,428 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-04 09:16:16,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:16,429 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:16:16,429 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:16:16,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:16:16,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:16:16,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 09:16:16,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 09:16:16,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-04 09:16:16,433 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-10-04 09:16:16,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:16,434 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-04 09:16:16,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 09:16:16,434 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-04 09:16:16,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 09:16:16,434 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:16,435 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-10-04 09:16:16,435 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:16,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:16,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-10-04 09:16:16,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:16,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:16,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:16,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:16,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:17,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:17,495 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:17,503 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:16:17,527 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-04 09:16:17,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:17,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:17,545 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:17,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:17,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 09:16:17,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 09:16:17,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 09:16:17,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:16:17,576 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-10-04 09:16:17,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:17,638 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-04 09:16:17,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 09:16:17,639 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-04 09:16:17,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:17,640 INFO L225 Difference]: With dead ends: 63 [2018-10-04 09:16:17,640 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 09:16:17,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:16:17,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 09:16:17,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 09:16:17,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 09:16:17,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-04 09:16:17,645 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-10-04 09:16:17,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:17,645 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-04 09:16:17,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 09:16:17,646 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-04 09:16:17,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 09:16:17,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:17,646 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-10-04 09:16:17,647 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:17,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:17,647 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-10-04 09:16:17,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:17,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:17,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:17,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:17,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:17,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:18,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:18,194 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:18,202 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:16:18,217 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:16:18,217 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:18,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:18,229 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:18,249 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:18,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 09:16:18,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 09:16:18,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 09:16:18,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 09:16:18,250 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-10-04 09:16:18,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:18,317 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-04 09:16:18,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 09:16:18,317 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-04 09:16:18,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:18,318 INFO L225 Difference]: With dead ends: 65 [2018-10-04 09:16:18,318 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 09:16:18,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 09:16:18,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 09:16:18,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 09:16:18,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 09:16:18,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-04 09:16:18,323 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-10-04 09:16:18,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:18,323 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-04 09:16:18,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 09:16:18,323 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-04 09:16:18,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 09:16:18,324 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:18,324 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-10-04 09:16:18,324 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:18,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:18,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-10-04 09:16:18,324 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:18,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:18,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:18,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:18,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:18,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:18,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:18,878 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:18,897 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:16:18,920 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-04 09:16:18,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:18,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:18,932 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:18,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:18,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 09:16:18,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 09:16:18,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 09:16:18,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:16:18,953 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-10-04 09:16:19,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:19,012 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-04 09:16:19,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 09:16:19,012 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-04 09:16:19,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:19,013 INFO L225 Difference]: With dead ends: 67 [2018-10-04 09:16:19,013 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 09:16:19,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:16:19,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 09:16:19,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 09:16:19,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 09:16:19,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-04 09:16:19,018 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-10-04 09:16:19,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:19,018 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-04 09:16:19,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 09:16:19,018 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-04 09:16:19,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 09:16:19,019 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:19,019 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-10-04 09:16:19,019 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:19,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:19,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-10-04 09:16:19,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:19,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:19,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:19,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:19,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:19,723 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:19,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:19,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:19,732 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:16:19,760 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 09:16:19,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:19,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:19,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:19,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 09:16:19,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 09:16:19,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 09:16:19,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 09:16:19,803 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-10-04 09:16:19,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:19,955 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-04 09:16:19,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 09:16:19,955 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-04 09:16:19,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:19,955 INFO L225 Difference]: With dead ends: 69 [2018-10-04 09:16:19,955 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 09:16:19,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 09:16:19,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 09:16:19,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 09:16:19,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 09:16:19,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-04 09:16:19,959 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-10-04 09:16:19,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:19,959 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-04 09:16:19,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 09:16:19,959 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-04 09:16:19,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 09:16:19,960 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:19,960 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-10-04 09:16:19,960 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:19,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:19,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-10-04 09:16:19,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:19,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:19,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:19,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:19,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:20,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:20,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:20,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:20,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:20,475 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:20,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:20,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 09:16:20,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 09:16:20,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 09:16:20,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:16:20,496 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-10-04 09:16:20,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:20,559 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-04 09:16:20,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 09:16:20,559 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-04 09:16:20,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:20,560 INFO L225 Difference]: With dead ends: 71 [2018-10-04 09:16:20,560 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 09:16:20,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:16:20,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 09:16:20,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 09:16:20,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 09:16:20,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-04 09:16:20,565 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-10-04 09:16:20,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:20,565 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-04 09:16:20,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 09:16:20,565 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-04 09:16:20,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 09:16:20,566 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:20,566 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-10-04 09:16:20,566 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:20,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:20,566 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-10-04 09:16:20,566 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:20,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:20,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:20,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:20,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:21,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:21,231 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:21,239 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:16:21,269 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:16:21,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:21,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:21,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:21,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:21,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 09:16:21,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 09:16:21,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 09:16:21,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 09:16:21,316 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-10-04 09:16:21,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:21,385 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-04 09:16:21,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 09:16:21,386 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-04 09:16:21,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:21,386 INFO L225 Difference]: With dead ends: 73 [2018-10-04 09:16:21,387 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 09:16:21,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 09:16:21,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 09:16:21,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-04 09:16:21,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 09:16:21,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-04 09:16:21,391 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-10-04 09:16:21,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:21,391 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-04 09:16:21,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 09:16:21,391 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-04 09:16:21,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 09:16:21,392 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:21,392 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-10-04 09:16:21,392 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:21,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:21,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-10-04 09:16:21,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:21,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:21,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:21,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:21,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:22,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:22,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:22,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:22,723 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:16:22,751 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-04 09:16:22,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:22,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:22,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:22,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 09:16:22,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 09:16:22,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 09:16:22,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 09:16:22,798 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-10-04 09:16:22,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:22,895 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-04 09:16:22,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 09:16:22,896 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-04 09:16:22,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:22,896 INFO L225 Difference]: With dead ends: 75 [2018-10-04 09:16:22,896 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 09:16:22,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 09:16:22,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 09:16:22,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 09:16:22,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 09:16:22,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-04 09:16:22,900 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-10-04 09:16:22,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:22,900 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-04 09:16:22,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 09:16:22,900 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-04 09:16:22,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 09:16:22,901 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:22,901 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-10-04 09:16:22,901 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:22,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:22,902 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-10-04 09:16:22,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:22,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:22,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:22,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:22,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:23,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:23,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:23,934 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:16:23,964 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:16:23,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:23,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:23,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:23,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 09:16:23,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 09:16:23,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 09:16:23,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 09:16:23,996 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-10-04 09:16:24,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:24,138 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-04 09:16:24,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 09:16:24,138 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-04 09:16:24,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:24,139 INFO L225 Difference]: With dead ends: 77 [2018-10-04 09:16:24,139 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 09:16:24,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 09:16:24,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 09:16:24,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-04 09:16:24,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 09:16:24,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-04 09:16:24,144 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-10-04 09:16:24,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:24,144 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-04 09:16:24,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 09:16:24,144 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-04 09:16:24,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 09:16:24,145 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:24,145 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-10-04 09:16:24,145 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:24,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:24,145 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-10-04 09:16:24,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:24,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:24,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:24,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:24,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:24,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:24,747 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:24,755 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:16:24,789 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-04 09:16:24,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:24,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:24,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:24,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 09:16:24,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 09:16:24,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 09:16:24,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:16:24,826 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-10-04 09:16:24,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:24,883 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-04 09:16:24,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 09:16:24,885 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-04 09:16:24,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:24,886 INFO L225 Difference]: With dead ends: 79 [2018-10-04 09:16:24,886 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 09:16:24,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:16:24,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 09:16:24,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 09:16:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 09:16:24,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-04 09:16:24,889 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-10-04 09:16:24,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:24,889 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-04 09:16:24,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 09:16:24,889 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-04 09:16:24,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 09:16:24,889 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:24,889 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-10-04 09:16:24,890 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:24,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:24,890 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-10-04 09:16:24,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:24,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:24,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:24,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:24,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:25,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:25,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:25,523 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:16:25,555 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-04 09:16:25,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:25,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:25,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:25,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:25,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 09:16:25,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 09:16:25,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 09:16:25,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 09:16:25,605 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-10-04 09:16:26,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:26,298 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-04 09:16:26,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 09:16:26,300 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-04 09:16:26,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:26,301 INFO L225 Difference]: With dead ends: 81 [2018-10-04 09:16:26,301 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 09:16:26,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 09:16:26,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 09:16:26,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-04 09:16:26,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 09:16:26,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-04 09:16:26,306 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-10-04 09:16:26,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:26,306 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-04 09:16:26,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 09:16:26,306 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-04 09:16:26,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 09:16:26,307 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:26,307 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-10-04 09:16:26,307 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:26,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:26,308 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-10-04 09:16:26,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:26,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:26,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:26,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:26,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:27,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:27,711 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:27,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:27,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:27,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:27,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:27,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:27,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 09:16:27,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 09:16:27,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 09:16:27,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 09:16:27,790 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-10-04 09:16:27,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:27,865 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-04 09:16:27,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 09:16:27,865 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-04 09:16:27,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:27,866 INFO L225 Difference]: With dead ends: 83 [2018-10-04 09:16:27,866 INFO L226 Difference]: Without dead ends: 81 [2018-10-04 09:16:27,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 09:16:27,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-04 09:16:27,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-04 09:16:27,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 09:16:27,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-04 09:16:27,870 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-10-04 09:16:27,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:27,870 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-04 09:16:27,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 09:16:27,870 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-04 09:16:27,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 09:16:27,871 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:27,871 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-10-04 09:16:27,871 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:27,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:27,871 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-10-04 09:16:27,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:27,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:27,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:27,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:27,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:27,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:28,574 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:28,574 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:28,581 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:16:28,602 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:16:28,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:28,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:28,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:28,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:28,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 09:16:28,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 09:16:28,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 09:16:28,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 09:16:28,642 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-10-04 09:16:28,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:28,726 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-04 09:16:28,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 09:16:28,727 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-04 09:16:28,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:28,728 INFO L225 Difference]: With dead ends: 85 [2018-10-04 09:16:28,728 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 09:16:28,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 09:16:28,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 09:16:28,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-04 09:16:28,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 09:16:28,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-04 09:16:28,732 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-10-04 09:16:28,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:28,732 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-04 09:16:28,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 09:16:28,733 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-04 09:16:28,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 09:16:28,733 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:28,733 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-10-04 09:16:28,733 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:28,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:28,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-10-04 09:16:28,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:28,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:28,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:28,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:28,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:29,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:29,584 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:29,590 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:16:29,628 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-04 09:16:29,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:29,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:29,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:29,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 09:16:29,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 09:16:29,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 09:16:29,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:16:29,664 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-10-04 09:16:29,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:29,794 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-04 09:16:29,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 09:16:29,795 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-04 09:16:29,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:29,796 INFO L225 Difference]: With dead ends: 87 [2018-10-04 09:16:29,796 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 09:16:29,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:16:29,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 09:16:29,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 09:16:29,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 09:16:29,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-04 09:16:29,800 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-10-04 09:16:29,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:29,801 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-04 09:16:29,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 09:16:29,801 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-04 09:16:29,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 09:16:29,801 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:29,801 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-10-04 09:16:29,802 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:29,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:29,802 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-10-04 09:16:29,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:29,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:29,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:29,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:29,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:30,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:30,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:30,738 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:30,746 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:16:30,767 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:16:30,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:30,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:30,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:30,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 09:16:30,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 09:16:30,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 09:16:30,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 09:16:30,805 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-10-04 09:16:30,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:30,888 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-04 09:16:30,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 09:16:30,888 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-04 09:16:30,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:30,889 INFO L225 Difference]: With dead ends: 89 [2018-10-04 09:16:30,889 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 09:16:30,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 09:16:30,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 09:16:30,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-04 09:16:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 09:16:30,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-04 09:16:30,894 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-10-04 09:16:30,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:30,895 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-04 09:16:30,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 09:16:30,895 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-04 09:16:30,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 09:16:30,896 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:30,896 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-10-04 09:16:30,896 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:30,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:30,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-10-04 09:16:30,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:30,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:30,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:30,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:30,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:31,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:31,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:31,722 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:16:31,757 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-04 09:16:31,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:31,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:31,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:31,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 09:16:31,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 09:16:31,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 09:16:31,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:16:31,800 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-10-04 09:16:31,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:31,886 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-04 09:16:31,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 09:16:31,886 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-04 09:16:31,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:31,887 INFO L225 Difference]: With dead ends: 91 [2018-10-04 09:16:31,887 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 09:16:31,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:16:31,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 09:16:31,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-04 09:16:31,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-04 09:16:31,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-04 09:16:31,891 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-10-04 09:16:31,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:31,891 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-04 09:16:31,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 09:16:31,891 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-04 09:16:31,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 09:16:31,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:31,892 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-10-04 09:16:31,892 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:31,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:31,893 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-10-04 09:16:31,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:31,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:31,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:31,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:31,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:33,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:33,115 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:33,125 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:16:33,169 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-04 09:16:33,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:33,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:33,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:33,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 09:16:33,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 09:16:33,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 09:16:33,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 09:16:33,209 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-10-04 09:16:33,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:33,275 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-04 09:16:33,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 09:16:33,275 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-04 09:16:33,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:33,276 INFO L225 Difference]: With dead ends: 93 [2018-10-04 09:16:33,276 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 09:16:33,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 09:16:33,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 09:16:33,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 09:16:33,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 09:16:33,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-04 09:16:33,279 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-10-04 09:16:33,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:33,280 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-04 09:16:33,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 09:16:33,280 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-04 09:16:33,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 09:16:33,280 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:33,280 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-10-04 09:16:33,280 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:33,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:33,281 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-10-04 09:16:33,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:33,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:33,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:33,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:33,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:34,815 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:34,815 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:34,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:34,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:34,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:34,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 09:16:34,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 09:16:34,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 09:16:34,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 09:16:34,889 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-10-04 09:16:34,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:34,971 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-04 09:16:34,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 09:16:34,972 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-04 09:16:34,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:34,973 INFO L225 Difference]: With dead ends: 95 [2018-10-04 09:16:34,973 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 09:16:34,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 09:16:34,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 09:16:34,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-04 09:16:34,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-04 09:16:34,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-04 09:16:34,976 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-10-04 09:16:34,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:34,976 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-04 09:16:34,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 09:16:34,976 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-04 09:16:34,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 09:16:34,977 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:34,977 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-10-04 09:16:34,978 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:34,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:34,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-10-04 09:16:34,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:34,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:34,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:34,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:34,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:34,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:35,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:35,842 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:35,856 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:16:35,881 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:16:35,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:35,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:35,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:35,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 09:16:35,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 09:16:35,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 09:16:35,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:16:35,917 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-10-04 09:16:36,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:36,260 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-04 09:16:36,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 09:16:36,261 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-04 09:16:36,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:36,262 INFO L225 Difference]: With dead ends: 97 [2018-10-04 09:16:36,262 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 09:16:36,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:16:36,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 09:16:36,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-04 09:16:36,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 09:16:36,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-04 09:16:36,266 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-10-04 09:16:36,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:36,266 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-04 09:16:36,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 09:16:36,266 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-04 09:16:36,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 09:16:36,267 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:36,267 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-10-04 09:16:36,267 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:36,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:36,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-10-04 09:16:36,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:36,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:36,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:36,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:36,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:37,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:37,151 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:37,151 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:37,161 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:16:37,203 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-04 09:16:37,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:37,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:37,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:37,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 09:16:37,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 09:16:37,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 09:16:37,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 09:16:37,255 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-10-04 09:16:37,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:37,353 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-04 09:16:37,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 09:16:37,354 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-04 09:16:37,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:37,354 INFO L225 Difference]: With dead ends: 99 [2018-10-04 09:16:37,355 INFO L226 Difference]: Without dead ends: 97 [2018-10-04 09:16:37,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 09:16:37,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-04 09:16:37,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-04 09:16:37,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-04 09:16:37,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-04 09:16:37,357 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-10-04 09:16:37,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:37,358 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-04 09:16:37,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 09:16:37,358 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-04 09:16:37,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 09:16:37,358 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:37,358 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-10-04 09:16:37,359 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:37,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:37,359 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-10-04 09:16:37,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:37,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:37,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:37,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:37,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:38,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:38,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:38,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:38,407 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:16:38,433 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:16:38,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:38,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:38,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:38,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:38,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 09:16:38,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 09:16:38,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 09:16:38,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 09:16:38,481 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-10-04 09:16:38,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:38,575 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-04 09:16:38,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 09:16:38,575 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-04 09:16:38,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:38,577 INFO L225 Difference]: With dead ends: 101 [2018-10-04 09:16:38,577 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 09:16:38,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 09:16:38,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 09:16:38,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-04 09:16:38,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 09:16:38,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-04 09:16:38,583 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-10-04 09:16:38,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:38,583 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-04 09:16:38,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 09:16:38,583 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-04 09:16:38,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 09:16:38,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:38,584 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-10-04 09:16:38,584 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:38,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:38,585 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-10-04 09:16:38,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:38,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:38,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:38,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:38,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:39,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:39,537 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:39,543 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:16:39,583 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-04 09:16:39,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:39,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:39,625 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:39,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 09:16:39,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 09:16:39,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 09:16:39,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:16:39,627 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-10-04 09:16:39,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:39,736 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-04 09:16:39,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 09:16:39,736 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-04 09:16:39,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:39,737 INFO L225 Difference]: With dead ends: 103 [2018-10-04 09:16:39,737 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 09:16:39,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:16:39,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 09:16:39,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 09:16:39,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 09:16:39,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-04 09:16:39,740 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-10-04 09:16:39,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:39,741 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-04 09:16:39,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 09:16:39,741 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-04 09:16:39,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 09:16:39,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:39,741 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-10-04 09:16:39,742 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:39,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:39,742 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-10-04 09:16:39,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:39,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:39,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:39,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:39,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:41,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:41,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:41,224 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:16:41,267 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-04 09:16:41,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:41,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:41,305 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:41,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 09:16:41,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 09:16:41,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 09:16:41,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 09:16:41,306 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-10-04 09:16:41,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:41,408 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-04 09:16:41,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 09:16:41,409 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-04 09:16:41,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:41,410 INFO L225 Difference]: With dead ends: 105 [2018-10-04 09:16:41,411 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 09:16:41,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 09:16:41,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 09:16:41,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-04 09:16:41,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 09:16:41,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-04 09:16:41,415 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-10-04 09:16:41,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:41,415 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-04 09:16:41,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 09:16:41,415 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-04 09:16:41,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 09:16:41,416 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:41,416 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-10-04 09:16:41,416 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:41,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:41,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-10-04 09:16:41,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:41,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:41,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:41,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:41,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:43,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:43,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:43,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:43,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:43,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:43,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 09:16:43,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 09:16:43,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 09:16:43,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 09:16:43,117 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-10-04 09:16:43,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:43,226 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-04 09:16:43,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 09:16:43,227 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-04 09:16:43,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:43,228 INFO L225 Difference]: With dead ends: 107 [2018-10-04 09:16:43,228 INFO L226 Difference]: Without dead ends: 105 [2018-10-04 09:16:43,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 09:16:43,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-04 09:16:43,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-04 09:16:43,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 09:16:43,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-04 09:16:43,231 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-10-04 09:16:43,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:43,232 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-04 09:16:43,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 09:16:43,232 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-04 09:16:43,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 09:16:43,233 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:43,233 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-10-04 09:16:43,233 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:43,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:43,234 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-10-04 09:16:43,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:43,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:43,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:43,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:43,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:44,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:44,926 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:44,935 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:16:44,987 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:16:44,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:44,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:45,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:45,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 09:16:45,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 09:16:45,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 09:16:45,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 09:16:45,052 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-10-04 09:16:45,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:45,247 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-04 09:16:45,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 09:16:45,248 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-04 09:16:45,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:45,249 INFO L225 Difference]: With dead ends: 109 [2018-10-04 09:16:45,250 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 09:16:45,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 09:16:45,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 09:16:45,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-04 09:16:45,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-04 09:16:45,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-04 09:16:45,253 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-10-04 09:16:45,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:45,254 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-04 09:16:45,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 09:16:45,254 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-04 09:16:45,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 09:16:45,254 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:45,255 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-10-04 09:16:45,255 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:45,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:45,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-10-04 09:16:45,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:45,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:45,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:45,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:45,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:46,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:46,516 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:46,524 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:16:46,570 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-04 09:16:46,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:46,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:46,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:46,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:46,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 09:16:46,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 09:16:46,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 09:16:46,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:16:46,626 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-10-04 09:16:46,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:46,784 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-04 09:16:46,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 09:16:46,784 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-04 09:16:46,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:46,785 INFO L225 Difference]: With dead ends: 111 [2018-10-04 09:16:46,785 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 09:16:46,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:16:46,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 09:16:46,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-04 09:16:46,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-04 09:16:46,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-04 09:16:46,790 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-10-04 09:16:46,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:46,790 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-04 09:16:46,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 09:16:46,791 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-04 09:16:46,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 09:16:46,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:46,791 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-10-04 09:16:46,792 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:46,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:46,792 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-10-04 09:16:46,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:46,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:46,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:46,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:46,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:46,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:48,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:48,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:48,263 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:16:48,311 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:16:48,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:48,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:48,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:48,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 09:16:48,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 09:16:48,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 09:16:48,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 09:16:48,366 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-10-04 09:16:48,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:48,541 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-04 09:16:48,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 09:16:48,542 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-04 09:16:48,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:48,543 INFO L225 Difference]: With dead ends: 113 [2018-10-04 09:16:48,543 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 09:16:48,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 09:16:48,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 09:16:48,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-04 09:16:48,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-04 09:16:48,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-04 09:16:48,548 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-10-04 09:16:48,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:48,548 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-04 09:16:48,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 09:16:48,549 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-04 09:16:48,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 09:16:48,549 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:48,549 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-10-04 09:16:48,550 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:48,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:48,550 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-10-04 09:16:48,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:48,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:48,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:48,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:48,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:49,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:49,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:49,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:49,779 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:16:49,829 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-04 09:16:49,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:49,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:49,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:49,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 09:16:49,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 09:16:49,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 09:16:49,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:16:49,882 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-10-04 09:16:50,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:50,026 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-04 09:16:50,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 09:16:50,026 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-04 09:16:50,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:50,028 INFO L225 Difference]: With dead ends: 115 [2018-10-04 09:16:50,028 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 09:16:50,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:16:50,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 09:16:50,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-04 09:16:50,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-04 09:16:50,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-04 09:16:50,032 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-10-04 09:16:50,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:50,033 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-04 09:16:50,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 09:16:50,033 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-04 09:16:50,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 09:16:50,034 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:50,034 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-10-04 09:16:50,034 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:50,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:50,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-10-04 09:16:50,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:50,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:50,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:50,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:50,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:51,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:51,374 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:51,382 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:16:51,447 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-04 09:16:51,447 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:51,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:51,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:51,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:51,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 09:16:51,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 09:16:51,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 09:16:51,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 09:16:51,488 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-10-04 09:16:52,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:52,246 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-04 09:16:52,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 09:16:52,247 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-04 09:16:52,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:52,248 INFO L225 Difference]: With dead ends: 117 [2018-10-04 09:16:52,248 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 09:16:52,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 09:16:52,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 09:16:52,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-04 09:16:52,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 09:16:52,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-04 09:16:52,253 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-10-04 09:16:52,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:52,253 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-04 09:16:52,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 09:16:52,254 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-04 09:16:52,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 09:16:52,254 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:52,255 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-10-04 09:16:52,255 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:52,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:52,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-10-04 09:16:52,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:52,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:52,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:52,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:52,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:53,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:53,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:53,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:53,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:53,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:53,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:53,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:53,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 09:16:53,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 09:16:53,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 09:16:53,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 09:16:53,990 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-10-04 09:16:54,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:54,403 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-04 09:16:54,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 09:16:54,403 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-04 09:16:54,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:54,405 INFO L225 Difference]: With dead ends: 119 [2018-10-04 09:16:54,405 INFO L226 Difference]: Without dead ends: 117 [2018-10-04 09:16:54,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 09:16:54,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-04 09:16:54,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-04 09:16:54,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-04 09:16:54,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-10-04 09:16:54,409 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-10-04 09:16:54,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:54,409 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-10-04 09:16:54,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 09:16:54,410 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-10-04 09:16:54,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 09:16:54,410 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:54,410 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-10-04 09:16:54,411 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:54,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:54,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-10-04 09:16:54,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:54,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:54,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:54,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:54,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:55,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:55,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:55,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:16:55,828 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:16:55,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:55,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:55,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:55,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:55,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 09:16:55,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 09:16:55,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 09:16:55,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 09:16:55,873 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-10-04 09:16:55,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:55,956 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-04 09:16:55,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 09:16:55,956 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-04 09:16:55,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:55,957 INFO L225 Difference]: With dead ends: 121 [2018-10-04 09:16:55,957 INFO L226 Difference]: Without dead ends: 119 [2018-10-04 09:16:55,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 09:16:55,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-04 09:16:55,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-04 09:16:55,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-04 09:16:55,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-04 09:16:55,960 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-10-04 09:16:55,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:55,961 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-04 09:16:55,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 09:16:55,961 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-04 09:16:55,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-04 09:16:55,961 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:55,961 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-10-04 09:16:55,962 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:55,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:55,962 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-10-04 09:16:55,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:55,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:55,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:55,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:55,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:55,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:57,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:57,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:57,393 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:57,400 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:16:57,456 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-04 09:16:57,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:57,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:57,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:57,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-04 09:16:57,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 09:16:57,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 09:16:57,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 09:16:57,516 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-10-04 09:16:57,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:57,859 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-04 09:16:57,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 09:16:57,859 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-10-04 09:16:57,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:57,860 INFO L225 Difference]: With dead ends: 123 [2018-10-04 09:16:57,860 INFO L226 Difference]: Without dead ends: 121 [2018-10-04 09:16:57,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 09:16:57,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-04 09:16:57,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-04 09:16:57,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-04 09:16:57,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-10-04 09:16:57,863 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-10-04 09:16:57,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:57,864 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-10-04 09:16:57,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 09:16:57,864 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-10-04 09:16:57,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-04 09:16:57,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:57,864 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-10-04 09:16:57,865 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:57,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:57,865 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-10-04 09:16:57,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:57,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:57,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:57,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:57,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:59,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:59,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:59,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:59,459 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:16:59,488 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:16:59,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:59,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:59,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:59,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-04 09:16:59,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-04 09:16:59,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-04 09:16:59,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-04 09:16:59,551 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-10-04 09:17:01,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:01,031 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-04 09:17:01,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 09:17:01,031 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-10-04 09:17:01,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:01,032 INFO L225 Difference]: With dead ends: 125 [2018-10-04 09:17:01,032 INFO L226 Difference]: Without dead ends: 123 [2018-10-04 09:17:01,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-04 09:17:01,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-04 09:17:01,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-04 09:17:01,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-04 09:17:01,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-04 09:17:01,036 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-10-04 09:17:01,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:01,036 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-04 09:17:01,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-04 09:17:01,036 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-04 09:17:01,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-04 09:17:01,037 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:01,037 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-10-04 09:17:01,037 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:01,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:01,037 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-10-04 09:17:01,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:01,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:01,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:01,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:01,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:02,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:02,763 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:02,771 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:17:02,823 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-04 09:17:02,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:02,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:02,884 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:02,884 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 09:17:02,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 09:17:02,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 09:17:02,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 09:17:02,886 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-10-04 09:17:03,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:03,057 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-04 09:17:03,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 09:17:03,057 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-10-04 09:17:03,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:03,058 INFO L225 Difference]: With dead ends: 127 [2018-10-04 09:17:03,058 INFO L226 Difference]: Without dead ends: 125 [2018-10-04 09:17:03,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 09:17:03,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-04 09:17:03,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-04 09:17:03,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-04 09:17:03,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-10-04 09:17:03,061 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-10-04 09:17:03,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:03,062 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-10-04 09:17:03,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 09:17:03,062 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-10-04 09:17:03,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-04 09:17:03,062 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:03,062 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-10-04 09:17:03,062 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:03,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:03,063 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-10-04 09:17:03,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:03,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:03,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:03,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:03,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:03,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:04,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:04,642 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:04,651 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:17:04,707 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-04 09:17:04,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:04,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:04,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:04,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:04,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-04 09:17:04,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-04 09:17:04,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-04 09:17:04,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-04 09:17:04,753 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-10-04 09:17:04,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:04,849 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-04 09:17:04,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 09:17:04,850 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-10-04 09:17:04,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:04,851 INFO L225 Difference]: With dead ends: 129 [2018-10-04 09:17:04,851 INFO L226 Difference]: Without dead ends: 127 [2018-10-04 09:17:04,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-04 09:17:04,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-04 09:17:04,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-04 09:17:04,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-04 09:17:04,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-10-04 09:17:04,855 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-10-04 09:17:04,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:04,855 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-10-04 09:17:04,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-04 09:17:04,855 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-10-04 09:17:04,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-04 09:17:04,856 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:04,856 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-10-04 09:17:04,856 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:04,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:04,857 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-10-04 09:17:04,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:04,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:04,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:04,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:04,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:07,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:07,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:07,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:17:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:07,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:07,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:07,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 09:17:07,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 09:17:07,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 09:17:07,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 09:17:07,590 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-10-04 09:17:07,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:07,748 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-10-04 09:17:07,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 09:17:07,749 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-10-04 09:17:07,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:07,750 INFO L225 Difference]: With dead ends: 131 [2018-10-04 09:17:07,750 INFO L226 Difference]: Without dead ends: 129 [2018-10-04 09:17:07,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 09:17:07,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-04 09:17:07,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-04 09:17:07,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-04 09:17:07,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-10-04 09:17:07,752 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-10-04 09:17:07,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:07,752 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-10-04 09:17:07,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 09:17:07,752 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-10-04 09:17:07,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-04 09:17:07,753 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:07,753 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-10-04 09:17:07,753 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:07,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:07,753 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-10-04 09:17:07,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:07,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:07,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:07,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:17:07,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:07,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:09,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:09,869 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:09,876 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:17:09,910 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:17:09,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:09,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:09,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:09,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-04 09:17:09,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 09:17:09,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 09:17:09,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 09:17:09,964 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-10-04 09:17:10,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:10,078 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-04 09:17:10,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 09:17:10,079 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-10-04 09:17:10,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:10,080 INFO L225 Difference]: With dead ends: 133 [2018-10-04 09:17:10,080 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 09:17:10,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 09:17:10,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 09:17:10,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-04 09:17:10,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-04 09:17:10,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-04 09:17:10,085 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-10-04 09:17:10,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:10,085 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-04 09:17:10,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 09:17:10,086 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-04 09:17:10,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-04 09:17:10,086 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:10,086 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-10-04 09:17:10,087 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:10,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:10,087 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-10-04 09:17:10,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:10,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:10,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:10,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:10,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:11,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:11,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:11,651 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:17:11,725 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-04 09:17:11,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:11,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:11,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:11,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:11,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-04 09:17:11,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 09:17:11,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 09:17:11,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 09:17:11,769 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-10-04 09:17:11,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:11,922 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-04 09:17:11,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 09:17:11,923 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-10-04 09:17:11,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:11,924 INFO L225 Difference]: With dead ends: 135 [2018-10-04 09:17:11,924 INFO L226 Difference]: Without dead ends: 133 [2018-10-04 09:17:11,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 09:17:11,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-04 09:17:11,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-04 09:17:11,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-04 09:17:11,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-10-04 09:17:11,927 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-10-04 09:17:11,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:11,927 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-10-04 09:17:11,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 09:17:11,927 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-10-04 09:17:11,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-04 09:17:11,928 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:11,928 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-10-04 09:17:11,928 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:11,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:11,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-10-04 09:17:11,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:11,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:11,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:11,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:11,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:13,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:13,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:13,705 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:17:13,737 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:17:13,738 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:13,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:13,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:13,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-04 09:17:13,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-04 09:17:13,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-04 09:17:13,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 09:17:13,799 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-10-04 09:17:13,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:13,912 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-04 09:17:13,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 09:17:13,913 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-10-04 09:17:13,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:13,914 INFO L225 Difference]: With dead ends: 137 [2018-10-04 09:17:13,914 INFO L226 Difference]: Without dead ends: 135 [2018-10-04 09:17:13,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 09:17:13,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-04 09:17:13,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-04 09:17:13,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-04 09:17:13,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-10-04 09:17:13,918 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-10-04 09:17:13,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:13,919 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-10-04 09:17:13,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-04 09:17:13,919 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-10-04 09:17:13,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-04 09:17:13,919 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:13,919 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-10-04 09:17:13,920 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:13,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:13,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-10-04 09:17:13,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:13,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:13,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:13,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:13,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:15,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:15,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:15,589 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:17:15,653 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-04 09:17:15,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:15,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:15,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:15,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 09:17:15,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 09:17:15,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 09:17:15,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 09:17:15,741 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-10-04 09:17:16,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:16,632 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-04 09:17:16,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 09:17:16,632 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-10-04 09:17:16,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:16,633 INFO L225 Difference]: With dead ends: 139 [2018-10-04 09:17:16,634 INFO L226 Difference]: Without dead ends: 137 [2018-10-04 09:17:16,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 09:17:16,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-04 09:17:16,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-04 09:17:16,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-04 09:17:16,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-10-04 09:17:16,637 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-10-04 09:17:16,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:16,638 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-10-04 09:17:16,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 09:17:16,638 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-10-04 09:17:16,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-04 09:17:16,639 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:16,639 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-10-04 09:17:16,639 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:16,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:16,639 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-10-04 09:17:16,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:16,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:16,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:16,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:16,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:18,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:18,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:18,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:18,477 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:17:18,611 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-04 09:17:18,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:18,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:18,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:18,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-04 09:17:18,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-04 09:17:18,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-04 09:17:18,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-04 09:17:18,676 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-10-04 09:17:18,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:18,840 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-04 09:17:18,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 09:17:18,841 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-10-04 09:17:18,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:18,841 INFO L225 Difference]: With dead ends: 141 [2018-10-04 09:17:18,842 INFO L226 Difference]: Without dead ends: 139 [2018-10-04 09:17:18,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-04 09:17:18,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-04 09:17:18,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-04 09:17:18,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-04 09:17:18,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-10-04 09:17:18,845 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-10-04 09:17:18,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:18,845 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-10-04 09:17:18,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-04 09:17:18,845 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-10-04 09:17:18,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-04 09:17:18,846 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:18,846 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-10-04 09:17:18,846 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:18,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:18,846 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-10-04 09:17:18,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:18,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:18,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:18,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:18,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:20,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:20,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:20,493 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:20,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:17:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:20,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:20,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:20,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 09:17:20,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 09:17:20,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 09:17:20,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 09:17:20,594 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-10-04 09:17:20,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:20,727 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-10-04 09:17:20,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 09:17:20,728 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-10-04 09:17:20,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:20,729 INFO L225 Difference]: With dead ends: 143 [2018-10-04 09:17:20,729 INFO L226 Difference]: Without dead ends: 141 [2018-10-04 09:17:20,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 09:17:20,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-04 09:17:20,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-04 09:17:20,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-04 09:17:20,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-10-04 09:17:20,733 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-10-04 09:17:20,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:20,733 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-10-04 09:17:20,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 09:17:20,733 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-10-04 09:17:20,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-04 09:17:20,733 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:20,734 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-10-04 09:17:20,734 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:20,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:20,734 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-10-04 09:17:20,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:20,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:20,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:20,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:17:20,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:22,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:22,644 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:22,651 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:17:22,688 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:17:22,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:22,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:22,732 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:22,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-04 09:17:22,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 09:17:22,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 09:17:22,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 09:17:22,734 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-10-04 09:17:22,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:22,851 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-04 09:17:22,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 09:17:22,851 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-10-04 09:17:22,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:22,852 INFO L225 Difference]: With dead ends: 145 [2018-10-04 09:17:22,852 INFO L226 Difference]: Without dead ends: 143 [2018-10-04 09:17:22,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 09:17:22,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-04 09:17:22,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-04 09:17:22,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-04 09:17:22,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-04 09:17:22,856 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-10-04 09:17:22,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:22,856 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-04 09:17:22,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 09:17:22,856 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-04 09:17:22,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-04 09:17:22,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:22,857 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-10-04 09:17:22,857 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:22,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:22,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-10-04 09:17:22,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:22,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:22,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:22,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:22,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:24,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:24,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:24,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:24,874 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:17:24,974 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-04 09:17:24,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:24,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:25,037 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:25,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-04 09:17:25,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 09:17:25,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 09:17:25,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 09:17:25,039 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-10-04 09:17:25,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:25,378 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-04 09:17:25,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 09:17:25,379 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-10-04 09:17:25,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:25,380 INFO L225 Difference]: With dead ends: 147 [2018-10-04 09:17:25,380 INFO L226 Difference]: Without dead ends: 145 [2018-10-04 09:17:25,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 09:17:25,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-04 09:17:25,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-04 09:17:25,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-04 09:17:25,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-10-04 09:17:25,384 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-10-04 09:17:25,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:25,384 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-10-04 09:17:25,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 09:17:25,384 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-10-04 09:17:25,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-04 09:17:25,384 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:25,385 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-10-04 09:17:25,385 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:25,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:25,385 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-10-04 09:17:25,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:25,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:25,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:25,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:25,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:27,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:27,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:27,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:27,279 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:17:27,316 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:17:27,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:27,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:27,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:27,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-04 09:17:27,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-04 09:17:27,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-04 09:17:27,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-04 09:17:27,362 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-10-04 09:17:27,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:27,536 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-04 09:17:27,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 09:17:27,536 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-10-04 09:17:27,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:27,537 INFO L225 Difference]: With dead ends: 149 [2018-10-04 09:17:27,537 INFO L226 Difference]: Without dead ends: 147 [2018-10-04 09:17:27,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-04 09:17:27,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-04 09:17:27,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-04 09:17:27,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-04 09:17:27,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-10-04 09:17:27,541 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-10-04 09:17:27,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:27,541 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-10-04 09:17:27,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-04 09:17:27,541 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-10-04 09:17:27,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-04 09:17:27,542 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:27,542 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-10-04 09:17:27,542 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:27,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:27,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-10-04 09:17:27,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:27,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:27,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:27,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:27,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:29,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:29,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:29,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:29,816 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:17:30,078 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-04 09:17:30,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:30,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:30,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:30,144 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:30,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-04 09:17:30,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 09:17:30,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 09:17:30,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 09:17:30,146 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-10-04 09:17:30,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:30,312 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-04 09:17:30,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 09:17:30,313 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-10-04 09:17:30,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:30,314 INFO L225 Difference]: With dead ends: 151 [2018-10-04 09:17:30,314 INFO L226 Difference]: Without dead ends: 149 [2018-10-04 09:17:30,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 09:17:30,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-04 09:17:30,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-04 09:17:30,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-04 09:17:30,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-10-04 09:17:30,317 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-10-04 09:17:30,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:30,318 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-10-04 09:17:30,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 09:17:30,318 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-10-04 09:17:30,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-04 09:17:30,319 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:30,319 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-10-04 09:17:30,319 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:30,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:30,319 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-10-04 09:17:30,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:30,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:30,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:30,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:30,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:32,292 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:32,292 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:32,298 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:17:32,369 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-04 09:17:32,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:32,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:32,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:32,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:32,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-04 09:17:32,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-04 09:17:32,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-04 09:17:32,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-04 09:17:32,418 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-10-04 09:17:32,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:32,557 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-04 09:17:32,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 09:17:32,558 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-10-04 09:17:32,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:32,559 INFO L225 Difference]: With dead ends: 153 [2018-10-04 09:17:32,560 INFO L226 Difference]: Without dead ends: 151 [2018-10-04 09:17:32,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-04 09:17:32,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-04 09:17:32,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-04 09:17:32,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-04 09:17:32,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-10-04 09:17:32,564 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-10-04 09:17:32,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:32,565 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-10-04 09:17:32,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-04 09:17:32,565 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-10-04 09:17:32,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-04 09:17:32,566 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:32,566 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-10-04 09:17:32,566 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:32,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:32,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-10-04 09:17:32,566 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:32,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:32,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:32,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:32,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:34,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:34,915 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:34,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:17:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:34,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:35,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:35,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-04 09:17:35,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 09:17:35,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 09:17:35,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 09:17:35,018 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-10-04 09:17:35,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:35,220 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-10-04 09:17:35,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 09:17:35,220 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-10-04 09:17:35,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:35,221 INFO L225 Difference]: With dead ends: 155 [2018-10-04 09:17:35,221 INFO L226 Difference]: Without dead ends: 153 [2018-10-04 09:17:35,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 09:17:35,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-04 09:17:35,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-04 09:17:35,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-04 09:17:35,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-10-04 09:17:35,226 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-10-04 09:17:35,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:35,226 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-10-04 09:17:35,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 09:17:35,226 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-10-04 09:17:35,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-04 09:17:35,227 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:35,227 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-10-04 09:17:35,227 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:35,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:35,227 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-10-04 09:17:35,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:35,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:35,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:35,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:17:35,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:35,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:37,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:37,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:37,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:37,343 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:17:37,382 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:17:37,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:37,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:37,435 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:37,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-04 09:17:37,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 09:17:37,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 09:17:37,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 09:17:37,437 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-10-04 09:17:37,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:37,669 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-04 09:17:37,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 09:17:37,669 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-10-04 09:17:37,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:37,670 INFO L225 Difference]: With dead ends: 157 [2018-10-04 09:17:37,670 INFO L226 Difference]: Without dead ends: 155 [2018-10-04 09:17:37,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 09:17:37,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-04 09:17:37,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-04 09:17:37,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-04 09:17:37,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-10-04 09:17:37,675 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-10-04 09:17:37,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:37,675 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-10-04 09:17:37,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 09:17:37,675 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-10-04 09:17:37,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-04 09:17:37,676 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:37,676 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-10-04 09:17:37,676 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:37,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:37,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-10-04 09:17:37,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:37,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:37,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:37,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:37,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:40,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:40,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:40,054 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:17:40,136 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-04 09:17:40,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:40,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:40,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:40,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-04 09:17:40,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 09:17:40,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 09:17:40,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 09:17:40,192 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-10-04 09:17:40,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:40,409 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-10-04 09:17:40,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 09:17:40,410 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-10-04 09:17:40,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:40,410 INFO L225 Difference]: With dead ends: 159 [2018-10-04 09:17:40,411 INFO L226 Difference]: Without dead ends: 157 [2018-10-04 09:17:40,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 09:17:40,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-04 09:17:40,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-04 09:17:40,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-04 09:17:40,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-10-04 09:17:40,413 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-10-04 09:17:40,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:40,414 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-10-04 09:17:40,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 09:17:40,414 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-10-04 09:17:40,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-04 09:17:40,414 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:40,414 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-10-04 09:17:40,415 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:40,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:40,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-10-04 09:17:40,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:40,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:40,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:40,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:40,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:42,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:42,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:42,495 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:17:42,535 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:17:42,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:42,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:42,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:42,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:42,590 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-04 09:17:42,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-04 09:17:42,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-04 09:17:42,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-04 09:17:42,592 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-10-04 09:17:42,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:42,813 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-10-04 09:17:42,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 09:17:42,814 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-10-04 09:17:42,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:42,814 INFO L225 Difference]: With dead ends: 161 [2018-10-04 09:17:42,815 INFO L226 Difference]: Without dead ends: 159 [2018-10-04 09:17:42,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-04 09:17:42,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-04 09:17:42,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-04 09:17:42,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-04 09:17:42,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-10-04 09:17:42,817 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-10-04 09:17:42,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:42,818 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-10-04 09:17:42,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-04 09:17:42,818 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-10-04 09:17:42,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-04 09:17:42,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:42,818 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-10-04 09:17:42,819 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:42,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:42,819 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-10-04 09:17:42,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:42,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:42,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:42,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:42,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:45,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:45,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:45,299 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:17:45,376 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-04 09:17:45,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:45,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:45,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:45,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-04 09:17:45,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 09:17:45,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 09:17:45,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 09:17:45,426 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-10-04 09:17:45,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:45,926 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-04 09:17:45,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 09:17:45,927 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-10-04 09:17:45,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:45,928 INFO L225 Difference]: With dead ends: 163 [2018-10-04 09:17:45,928 INFO L226 Difference]: Without dead ends: 161 [2018-10-04 09:17:45,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 09:17:45,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-04 09:17:45,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-04 09:17:45,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-04 09:17:45,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-10-04 09:17:45,932 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-10-04 09:17:45,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:45,932 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-10-04 09:17:45,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 09:17:45,932 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-10-04 09:17:45,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-04 09:17:45,933 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:45,934 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-10-04 09:17:45,934 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:45,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:45,934 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-10-04 09:17:45,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:45,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:45,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:45,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:45,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:45,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:49,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:49,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:49,027 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:17:49,115 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-04 09:17:49,115 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:49,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:49,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:49,186 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:49,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-04 09:17:49,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-04 09:17:49,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-04 09:17:49,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-04 09:17:49,188 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-10-04 09:17:49,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:49,378 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-10-04 09:17:49,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 09:17:49,379 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-10-04 09:17:49,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:49,380 INFO L225 Difference]: With dead ends: 165 [2018-10-04 09:17:49,380 INFO L226 Difference]: Without dead ends: 163 [2018-10-04 09:17:49,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-04 09:17:49,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-04 09:17:49,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-04 09:17:49,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-04 09:17:49,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-10-04 09:17:49,383 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-10-04 09:17:49,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:49,384 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-10-04 09:17:49,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-04 09:17:49,384 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-10-04 09:17:49,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-04 09:17:49,385 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:49,385 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-10-04 09:17:49,385 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:49,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:49,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-10-04 09:17:49,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:49,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:49,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:49,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:49,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:51,653 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:51,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:51,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:17:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:51,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:51,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:51,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:51,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-04 09:17:51,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 09:17:51,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 09:17:51,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 09:17:51,749 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-10-04 09:17:51,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:51,990 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-10-04 09:17:51,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 09:17:51,990 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-10-04 09:17:51,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:51,991 INFO L225 Difference]: With dead ends: 167 [2018-10-04 09:17:51,991 INFO L226 Difference]: Without dead ends: 165 [2018-10-04 09:17:51,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 09:17:51,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-04 09:17:51,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-04 09:17:51,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-04 09:17:51,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-10-04 09:17:51,994 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-10-04 09:17:51,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:51,994 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-10-04 09:17:51,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 09:17:51,994 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-10-04 09:17:51,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-04 09:17:51,995 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:51,995 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-10-04 09:17:51,995 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:51,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:51,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-10-04 09:17:51,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:51,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:51,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:51,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:17:51,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:54,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:54,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:54,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:54,665 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:17:54,703 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:17:54,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:54,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:54,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:54,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-04 09:17:54,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 09:17:54,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 09:17:54,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 09:17:54,773 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-10-04 09:17:54,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:54,953 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-10-04 09:17:54,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 09:17:54,954 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-10-04 09:17:54,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:54,954 INFO L225 Difference]: With dead ends: 169 [2018-10-04 09:17:54,954 INFO L226 Difference]: Without dead ends: 167 [2018-10-04 09:17:54,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 09:17:54,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-04 09:17:54,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-04 09:17:54,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-04 09:17:54,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-10-04 09:17:54,957 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-10-04 09:17:54,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:54,958 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-10-04 09:17:54,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 09:17:54,958 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-10-04 09:17:54,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-04 09:17:54,958 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:54,959 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-10-04 09:17:54,959 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:54,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:54,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-10-04 09:17:54,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:54,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:54,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:54,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:54,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:17:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:57,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:17:57,525 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:17:57,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:17:57,623 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-10-04 09:17:57,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:17:57,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:17:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:17:57,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:17:57,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-04 09:17:57,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 09:17:57,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 09:17:57,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 09:17:57,675 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-10-04 09:17:57,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:17:57,869 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-10-04 09:17:57,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-04 09:17:57,869 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-10-04 09:17:57,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:17:57,870 INFO L225 Difference]: With dead ends: 171 [2018-10-04 09:17:57,870 INFO L226 Difference]: Without dead ends: 169 [2018-10-04 09:17:57,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 09:17:57,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-04 09:17:57,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-04 09:17:57,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-04 09:17:57,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-10-04 09:17:57,874 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-10-04 09:17:57,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:17:57,874 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-10-04 09:17:57,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 09:17:57,874 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-10-04 09:17:57,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-04 09:17:57,875 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:17:57,875 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-10-04 09:17:57,875 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:17:57,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:17:57,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-10-04 09:17:57,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:17:57,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:17:57,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:57,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:17:57,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:17:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:00,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:18:00,648 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:18:00,657 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:18:00,698 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:18:00,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:18:00,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:18:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:00,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:18:00,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-04 09:18:00,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-04 09:18:00,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-04 09:18:00,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-04 09:18:00,770 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-10-04 09:18:01,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:18:01,062 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-10-04 09:18:01,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-04 09:18:01,062 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-10-04 09:18:01,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:18:01,063 INFO L225 Difference]: With dead ends: 173 [2018-10-04 09:18:01,063 INFO L226 Difference]: Without dead ends: 171 [2018-10-04 09:18:01,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-04 09:18:01,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-04 09:18:01,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-04 09:18:01,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-04 09:18:01,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-10-04 09:18:01,066 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-10-04 09:18:01,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:18:01,067 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-10-04 09:18:01,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-04 09:18:01,067 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-10-04 09:18:01,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-04 09:18:01,067 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:18:01,067 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-10-04 09:18:01,068 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:18:01,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:18:01,068 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-10-04 09:18:01,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:18:01,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:18:01,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:01,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:18:01,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:01,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:03,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:18:03,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:18:03,619 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:18:03,704 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-10-04 09:18:03,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:18:03,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:18:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:03,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:18:03,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-04 09:18:03,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 09:18:03,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 09:18:03,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 09:18:03,759 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-10-04 09:18:04,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:18:04,033 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-10-04 09:18:04,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-04 09:18:04,033 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-10-04 09:18:04,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:18:04,034 INFO L225 Difference]: With dead ends: 175 [2018-10-04 09:18:04,034 INFO L226 Difference]: Without dead ends: 173 [2018-10-04 09:18:04,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 09:18:04,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-04 09:18:04,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-04 09:18:04,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-04 09:18:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-10-04 09:18:04,037 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-10-04 09:18:04,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:18:04,037 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-10-04 09:18:04,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 09:18:04,038 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-10-04 09:18:04,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-04 09:18:04,038 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:18:04,039 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-10-04 09:18:04,039 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:18:04,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:18:04,039 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-10-04 09:18:04,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:18:04,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:18:04,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:04,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:18:04,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:04,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:06,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:06,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:18:06,890 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:18:06,897 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:18:06,984 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-10-04 09:18:06,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:18:06,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:18:07,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:07,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:18:07,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-04 09:18:07,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-04 09:18:07,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-04 09:18:07,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-04 09:18:07,040 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-10-04 09:18:07,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:18:07,484 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-10-04 09:18:07,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-04 09:18:07,484 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-10-04 09:18:07,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:18:07,485 INFO L225 Difference]: With dead ends: 177 [2018-10-04 09:18:07,485 INFO L226 Difference]: Without dead ends: 175 [2018-10-04 09:18:07,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-04 09:18:07,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-04 09:18:07,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-04 09:18:07,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-04 09:18:07,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-10-04 09:18:07,490 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-10-04 09:18:07,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:18:07,490 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-10-04 09:18:07,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-04 09:18:07,490 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-10-04 09:18:07,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-04 09:18:07,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:18:07,491 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-10-04 09:18:07,491 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:18:07,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:18:07,492 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-10-04 09:18:07,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:18:07,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:18:07,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:07,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:18:07,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:10,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:18:10,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:18:10,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:18:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:10,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:18:10,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:10,604 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:18:10,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-04 09:18:10,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 09:18:10,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 09:18:10,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 09:18:10,606 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-10-04 09:18:10,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:18:10,887 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-10-04 09:18:10,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-04 09:18:10,887 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-10-04 09:18:10,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:18:10,888 INFO L225 Difference]: With dead ends: 179 [2018-10-04 09:18:10,888 INFO L226 Difference]: Without dead ends: 177 [2018-10-04 09:18:10,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 09:18:10,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-04 09:18:10,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-10-04 09:18:10,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-04 09:18:10,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-10-04 09:18:10,892 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-10-04 09:18:10,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:18:10,893 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-10-04 09:18:10,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 09:18:10,893 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-10-04 09:18:10,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-04 09:18:10,894 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:18:10,894 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-10-04 09:18:10,894 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:18:10,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:18:10,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-10-04 09:18:10,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:18:10,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:18:10,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:10,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:18:10,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:13,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:18:13,648 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:18:13,656 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:18:13,711 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:18:13,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:18:13,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:18:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:13,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:18:13,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-04 09:18:13,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-04 09:18:13,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-04 09:18:13,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-04 09:18:13,766 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-10-04 09:18:13,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:18:13,920 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-10-04 09:18:13,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-04 09:18:13,920 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-10-04 09:18:13,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:18:13,922 INFO L225 Difference]: With dead ends: 181 [2018-10-04 09:18:13,922 INFO L226 Difference]: Without dead ends: 179 [2018-10-04 09:18:13,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-04 09:18:13,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-04 09:18:13,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-10-04 09:18:13,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-04 09:18:13,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-10-04 09:18:13,926 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-10-04 09:18:13,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:18:13,926 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-10-04 09:18:13,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-04 09:18:13,926 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-10-04 09:18:13,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-04 09:18:13,927 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:18:13,927 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-10-04 09:18:13,927 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:18:13,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:18:13,927 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-10-04 09:18:13,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:18:13,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:18:13,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:13,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:18:13,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:17,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:18:17,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:18:17,095 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:18:17,193 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-10-04 09:18:17,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:18:17,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:18:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:17,247 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:18:17,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-04 09:18:17,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 09:18:17,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 09:18:17,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 09:18:17,249 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-10-04 09:18:17,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:18:17,541 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-10-04 09:18:17,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-04 09:18:17,541 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-10-04 09:18:17,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:18:17,542 INFO L225 Difference]: With dead ends: 183 [2018-10-04 09:18:17,542 INFO L226 Difference]: Without dead ends: 181 [2018-10-04 09:18:17,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 09:18:17,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-04 09:18:17,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-04 09:18:17,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-04 09:18:17,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-10-04 09:18:17,545 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-10-04 09:18:17,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:18:17,546 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-10-04 09:18:17,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 09:18:17,546 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-10-04 09:18:17,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-04 09:18:17,546 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:18:17,546 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-10-04 09:18:17,547 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:18:17,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:18:17,547 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-10-04 09:18:17,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:18:17,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:18:17,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:17,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:18:17,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:20,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:18:20,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:18:20,644 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:18:20,690 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:18:20,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:18:20,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:18:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:20,745 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:18:20,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-04 09:18:20,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-04 09:18:20,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-04 09:18:20,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-04 09:18:20,746 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-10-04 09:18:20,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:18:20,942 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-10-04 09:18:20,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-04 09:18:20,943 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-10-04 09:18:20,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:18:20,944 INFO L225 Difference]: With dead ends: 185 [2018-10-04 09:18:20,944 INFO L226 Difference]: Without dead ends: 183 [2018-10-04 09:18:20,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-04 09:18:20,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-04 09:18:20,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-10-04 09:18:20,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-04 09:18:20,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-10-04 09:18:20,948 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-10-04 09:18:20,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:18:20,948 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-10-04 09:18:20,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-04 09:18:20,948 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-10-04 09:18:20,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-04 09:18:20,949 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:18:20,949 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-10-04 09:18:20,949 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:18:20,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:18:20,950 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-10-04 09:18:20,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:18:20,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:18:20,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:20,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:18:20,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:23,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:23,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:18:23,808 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:18:23,815 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:18:23,906 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-10-04 09:18:23,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:18:23,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:18:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:23,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:18:23,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-04 09:18:23,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 09:18:23,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 09:18:23,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 09:18:23,964 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-10-04 09:18:24,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:18:24,286 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-10-04 09:18:24,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-04 09:18:24,287 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-10-04 09:18:24,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:18:24,287 INFO L225 Difference]: With dead ends: 187 [2018-10-04 09:18:24,287 INFO L226 Difference]: Without dead ends: 185 [2018-10-04 09:18:24,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 09:18:24,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-04 09:18:24,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-10-04 09:18:24,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-04 09:18:24,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-10-04 09:18:24,291 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-10-04 09:18:24,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:18:24,291 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-10-04 09:18:24,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 09:18:24,292 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-10-04 09:18:24,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-04 09:18:24,292 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:18:24,292 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-10-04 09:18:24,292 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:18:24,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:18:24,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-10-04 09:18:24,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:18:24,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:18:24,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:24,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:18:24,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:27,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:18:27,436 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:18:27,445 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:18:27,539 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-10-04 09:18:27,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:18:27,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:18:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:27,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:18:27,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-04 09:18:27,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-04 09:18:27,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-04 09:18:27,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-04 09:18:27,596 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-10-04 09:18:27,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:18:27,843 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-10-04 09:18:27,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-04 09:18:27,843 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-10-04 09:18:27,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:18:27,844 INFO L225 Difference]: With dead ends: 189 [2018-10-04 09:18:27,844 INFO L226 Difference]: Without dead ends: 187 [2018-10-04 09:18:27,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-04 09:18:27,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-04 09:18:27,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-04 09:18:27,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-04 09:18:27,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-10-04 09:18:27,849 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-10-04 09:18:27,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:18:27,849 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-10-04 09:18:27,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-04 09:18:27,849 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-10-04 09:18:27,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-04 09:18:27,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:18:27,850 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-10-04 09:18:27,850 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:18:27,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:18:27,851 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-10-04 09:18:27,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:18:27,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:18:27,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:27,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:18:27,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:31,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:18:31,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:18:31,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:18:31,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:31,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:18:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:31,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:18:31,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-04 09:18:31,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 09:18:31,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 09:18:31,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 09:18:31,198 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-10-04 09:18:31,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:18:31,389 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-10-04 09:18:31,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-04 09:18:31,390 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-10-04 09:18:31,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:18:31,391 INFO L225 Difference]: With dead ends: 191 [2018-10-04 09:18:31,391 INFO L226 Difference]: Without dead ends: 189 [2018-10-04 09:18:31,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 09:18:31,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-04 09:18:31,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-10-04 09:18:31,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-04 09:18:31,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-10-04 09:18:31,395 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-10-04 09:18:31,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:18:31,395 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-10-04 09:18:31,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 09:18:31,395 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-10-04 09:18:31,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-04 09:18:31,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:18:31,397 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-10-04 09:18:31,397 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:18:31,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:18:31,397 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-10-04 09:18:31,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:18:31,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:18:31,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:31,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:18:31,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:31,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:34,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:34,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:18:34,561 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:18:34,567 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:18:34,612 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:18:34,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:18:34,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:18:34,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:34,669 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:18:34,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-04 09:18:34,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-04 09:18:34,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-04 09:18:34,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-04 09:18:34,670 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-10-04 09:18:34,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:18:34,842 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-10-04 09:18:34,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-04 09:18:34,843 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-10-04 09:18:34,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:18:34,844 INFO L225 Difference]: With dead ends: 193 [2018-10-04 09:18:34,844 INFO L226 Difference]: Without dead ends: 191 [2018-10-04 09:18:34,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-04 09:18:34,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-04 09:18:34,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-04 09:18:34,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-04 09:18:34,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-10-04 09:18:34,849 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-10-04 09:18:34,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:18:34,849 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-10-04 09:18:34,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-04 09:18:34,849 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-10-04 09:18:34,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-04 09:18:34,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:18:34,850 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-10-04 09:18:34,851 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:18:34,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:18:34,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-10-04 09:18:34,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:18:34,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:18:34,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:34,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:18:34,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:34,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:38,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:18:38,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:18:38,625 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:18:38,732 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-10-04 09:18:38,732 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:18:38,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:18:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:38,790 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:18:38,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-04 09:18:38,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 09:18:38,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 09:18:38,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 09:18:38,791 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-10-04 09:18:38,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:18:38,996 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-10-04 09:18:38,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-04 09:18:38,997 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-10-04 09:18:38,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:18:38,997 INFO L225 Difference]: With dead ends: 195 [2018-10-04 09:18:38,998 INFO L226 Difference]: Without dead ends: 193 [2018-10-04 09:18:38,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 09:18:38,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-04 09:18:39,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-10-04 09:18:39,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-04 09:18:39,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-10-04 09:18:39,001 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-10-04 09:18:39,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:18:39,001 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-10-04 09:18:39,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 09:18:39,001 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-10-04 09:18:39,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-04 09:18:39,002 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:18:39,002 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-10-04 09:18:39,002 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:18:39,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:18:39,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-10-04 09:18:39,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:18:39,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:18:39,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:39,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:18:39,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:39,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:42,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:42,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:18:42,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:18:42,344 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:18:42,389 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:18:42,389 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:18:42,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:18:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:42,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:18:42,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-04 09:18:42,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-04 09:18:42,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-04 09:18:42,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-04 09:18:42,468 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-10-04 09:18:42,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:18:42,771 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-10-04 09:18:42,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-04 09:18:42,771 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-10-04 09:18:42,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:18:42,772 INFO L225 Difference]: With dead ends: 197 [2018-10-04 09:18:42,772 INFO L226 Difference]: Without dead ends: 195 [2018-10-04 09:18:42,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-04 09:18:42,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-04 09:18:42,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-10-04 09:18:42,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-04 09:18:42,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-10-04 09:18:42,775 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-10-04 09:18:42,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:18:42,776 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-10-04 09:18:42,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-04 09:18:42,776 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-10-04 09:18:42,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-04 09:18:42,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:18:42,776 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-10-04 09:18:42,777 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:18:42,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:18:42,777 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-10-04 09:18:42,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:18:42,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:18:42,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:42,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:18:42,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:46,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:46,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:18:46,238 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-04 09:18:46,246 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:18:46,347 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-10-04 09:18:46,348 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:18:46,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:18:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:46,406 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:18:46,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-04 09:18:46,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 09:18:46,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 09:18:46,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 09:18:46,408 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-10-04 09:18:46,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:18:46,737 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-10-04 09:18:46,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-04 09:18:46,737 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-10-04 09:18:46,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:18:46,738 INFO L225 Difference]: With dead ends: 199 [2018-10-04 09:18:46,738 INFO L226 Difference]: Without dead ends: 197 [2018-10-04 09:18:46,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 09:18:46,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-04 09:18:46,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-10-04 09:18:46,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-04 09:18:46,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-10-04 09:18:46,742 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-10-04 09:18:46,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:18:46,742 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-10-04 09:18:46,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 09:18:46,743 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-10-04 09:18:46,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-04 09:18:46,743 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:18:46,744 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-10-04 09:18:46,744 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:18:46,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:18:46,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-10-04 09:18:46,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:18:46,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:18:46,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:46,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:18:46,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:50,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:50,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:18:50,058 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:18:50,066 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:18:50,170 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-10-04 09:18:50,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:18:50,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:18:50,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:50,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:18:50,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-04 09:18:50,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-04 09:18:50,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-04 09:18:50,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-04 09:18:50,231 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2018-10-04 09:18:50,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:18:50,450 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-10-04 09:18:50,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-04 09:18:50,450 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2018-10-04 09:18:50,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:18:50,452 INFO L225 Difference]: With dead ends: 201 [2018-10-04 09:18:50,452 INFO L226 Difference]: Without dead ends: 199 [2018-10-04 09:18:50,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-04 09:18:50,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-04 09:18:50,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-10-04 09:18:50,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-04 09:18:50,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-10-04 09:18:50,456 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2018-10-04 09:18:50,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:18:50,457 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-10-04 09:18:50,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-04 09:18:50,457 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-10-04 09:18:50,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-04 09:18:50,458 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:18:50,458 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-10-04 09:18:50,458 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:18:50,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:18:50,458 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 97 times [2018-10-04 09:18:50,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:18:50,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:18:50,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:50,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:18:50,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:50,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:53,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:53,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:18:53,907 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:18:53,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:18:53,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:53,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:18:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:54,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:18:54,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-04 09:18:54,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-04 09:18:54,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-04 09:18:54,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-04 09:18:54,025 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 100 states. [2018-10-04 09:18:54,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:18:54,376 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-10-04 09:18:54,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-04 09:18:54,376 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-10-04 09:18:54,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:18:54,377 INFO L225 Difference]: With dead ends: 203 [2018-10-04 09:18:54,377 INFO L226 Difference]: Without dead ends: 201 [2018-10-04 09:18:54,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-04 09:18:54,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-04 09:18:54,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-10-04 09:18:54,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-10-04 09:18:54,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-10-04 09:18:54,380 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2018-10-04 09:18:54,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:18:54,380 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-10-04 09:18:54,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-04 09:18:54,380 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-10-04 09:18:54,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-04 09:18:54,381 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:18:54,381 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1] [2018-10-04 09:18:54,382 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:18:54,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:18:54,382 INFO L82 PathProgramCache]: Analyzing trace with hash 925303419, now seen corresponding path program 98 times [2018-10-04 09:18:54,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:18:54,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:18:54,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:54,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:18:54,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:54,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:18:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:58,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:18:58,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:18:58,181 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:18:58,233 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:18:58,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:18:58,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:18:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:18:58,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:18:58,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-04 09:18:58,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-04 09:18:58,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-04 09:18:58,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-04 09:18:58,306 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 101 states. [2018-10-04 09:18:58,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:18:58,632 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-10-04 09:18:58,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-04 09:18:58,632 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 200 [2018-10-04 09:18:58,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:18:58,633 INFO L225 Difference]: With dead ends: 205 [2018-10-04 09:18:58,633 INFO L226 Difference]: Without dead ends: 203 [2018-10-04 09:18:58,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-04 09:18:58,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-04 09:18:58,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-10-04 09:18:58,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-04 09:18:58,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-10-04 09:18:58,636 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2018-10-04 09:18:58,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:18:58,637 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-10-04 09:18:58,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-04 09:18:58,637 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-10-04 09:18:58,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-04 09:18:58,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:18:58,637 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1] [2018-10-04 09:18:58,638 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:18:58,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:18:58,638 INFO L82 PathProgramCache]: Analyzing trace with hash 158407477, now seen corresponding path program 99 times [2018-10-04 09:18:58,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:18:58,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:18:58,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:58,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:18:58,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:18:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:19:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:02,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:19:02,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:19:02,546 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:19:02,669 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-10-04 09:19:02,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:19:02,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:19:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:02,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:19:02,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-04 09:19:02,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 09:19:02,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 09:19:02,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 09:19:02,732 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 102 states. [2018-10-04 09:19:03,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:19:03,005 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-10-04 09:19:03,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-04 09:19:03,005 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-10-04 09:19:03,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:19:03,006 INFO L225 Difference]: With dead ends: 207 [2018-10-04 09:19:03,006 INFO L226 Difference]: Without dead ends: 205 [2018-10-04 09:19:03,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 09:19:03,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-10-04 09:19:03,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-10-04 09:19:03,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-04 09:19:03,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2018-10-04 09:19:03,009 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2018-10-04 09:19:03,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:19:03,009 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2018-10-04 09:19:03,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 09:19:03,009 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2018-10-04 09:19:03,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-10-04 09:19:03,010 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:19:03,010 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1] [2018-10-04 09:19:03,010 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:19:03,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:19:03,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1905782127, now seen corresponding path program 100 times [2018-10-04 09:19:03,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:19:03,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:19:03,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:03,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:19:03,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:19:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:06,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:19:06,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:19:06,844 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:19:06,893 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:19:06,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:19:06,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:19:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:06,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:19:06,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-04 09:19:06,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-04 09:19:06,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-04 09:19:06,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-04 09:19:06,961 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 103 states. [2018-10-04 09:19:07,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:19:07,210 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-10-04 09:19:07,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-04 09:19:07,211 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 204 [2018-10-04 09:19:07,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:19:07,212 INFO L225 Difference]: With dead ends: 209 [2018-10-04 09:19:07,212 INFO L226 Difference]: Without dead ends: 207 [2018-10-04 09:19:07,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-04 09:19:07,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-04 09:19:07,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-10-04 09:19:07,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-10-04 09:19:07,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-10-04 09:19:07,217 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2018-10-04 09:19:07,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:19:07,217 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-10-04 09:19:07,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-04 09:19:07,217 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-10-04 09:19:07,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-04 09:19:07,218 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:19:07,218 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1] [2018-10-04 09:19:07,219 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:19:07,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:19:07,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1800608041, now seen corresponding path program 101 times [2018-10-04 09:19:07,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:19:07,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:19:07,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:07,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:19:07,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:19:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:10,877 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:19:10,877 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:19:10,886 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:19:11,177 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-10-04 09:19:11,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:19:11,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:19:11,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:11,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:19:11,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-04 09:19:11,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-04 09:19:11,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-04 09:19:11,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 09:19:11,244 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 104 states. [2018-10-04 09:19:11,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:19:11,503 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-10-04 09:19:11,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-04 09:19:11,504 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 206 [2018-10-04 09:19:11,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:19:11,505 INFO L225 Difference]: With dead ends: 211 [2018-10-04 09:19:11,505 INFO L226 Difference]: Without dead ends: 209 [2018-10-04 09:19:11,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 09:19:11,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-10-04 09:19:11,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-10-04 09:19:11,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-04 09:19:11,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-10-04 09:19:11,508 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2018-10-04 09:19:11,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:19:11,508 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-10-04 09:19:11,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-04 09:19:11,508 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-10-04 09:19:11,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-04 09:19:11,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:19:11,509 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1] [2018-10-04 09:19:11,509 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:19:11,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:19:11,510 INFO L82 PathProgramCache]: Analyzing trace with hash -487440797, now seen corresponding path program 102 times [2018-10-04 09:19:11,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:19:11,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:19:11,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:11,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:19:11,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:11,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:19:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:15,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:19:15,241 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:19:15,249 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:19:15,367 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-10-04 09:19:15,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:19:15,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:19:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:15,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:19:15,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-04 09:19:15,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-04 09:19:15,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-04 09:19:15,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-04 09:19:15,431 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 105 states. [2018-10-04 09:19:15,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:19:15,784 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-10-04 09:19:15,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-04 09:19:15,785 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 208 [2018-10-04 09:19:15,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:19:15,785 INFO L225 Difference]: With dead ends: 213 [2018-10-04 09:19:15,785 INFO L226 Difference]: Without dead ends: 211 [2018-10-04 09:19:15,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-04 09:19:15,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-04 09:19:15,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-10-04 09:19:15,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-10-04 09:19:15,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-10-04 09:19:15,789 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2018-10-04 09:19:15,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:19:15,789 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-10-04 09:19:15,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-04 09:19:15,790 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-10-04 09:19:15,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-10-04 09:19:15,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:19:15,791 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1] [2018-10-04 09:19:15,791 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:19:15,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:19:15,791 INFO L82 PathProgramCache]: Analyzing trace with hash -279118563, now seen corresponding path program 103 times [2018-10-04 09:19:15,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:19:15,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:19:15,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:15,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:19:15,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:19:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:19,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:19:19,801 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:19:19,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:19:19,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:19:19,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:19:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:19,942 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:19:19,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-04 09:19:19,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-04 09:19:19,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-04 09:19:19,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-04 09:19:19,943 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 106 states. [2018-10-04 09:19:20,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:19:20,342 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-10-04 09:19:20,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-04 09:19:20,342 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 210 [2018-10-04 09:19:20,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:19:20,343 INFO L225 Difference]: With dead ends: 215 [2018-10-04 09:19:20,343 INFO L226 Difference]: Without dead ends: 213 [2018-10-04 09:19:20,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-04 09:19:20,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-10-04 09:19:20,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-10-04 09:19:20,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-10-04 09:19:20,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-10-04 09:19:20,347 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2018-10-04 09:19:20,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:19:20,347 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-10-04 09:19:20,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-04 09:19:20,347 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-10-04 09:19:20,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-04 09:19:20,348 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:19:20,349 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 1, 1, 1] [2018-10-04 09:19:20,349 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:19:20,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:19:20,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1944914601, now seen corresponding path program 104 times [2018-10-04 09:19:20,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:19:20,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:19:20,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:20,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:19:20,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:20,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:19:24,505 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:24,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:19:24,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:19:24,513 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:19:24,568 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:19:24,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:19:24,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:19:24,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:24,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:19:24,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-04 09:19:24,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-04 09:19:24,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-04 09:19:24,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-04 09:19:24,661 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 107 states. [2018-10-04 09:19:25,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:19:25,007 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-10-04 09:19:25,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-04 09:19:25,008 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 212 [2018-10-04 09:19:25,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:19:25,009 INFO L225 Difference]: With dead ends: 217 [2018-10-04 09:19:25,009 INFO L226 Difference]: Without dead ends: 215 [2018-10-04 09:19:25,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-04 09:19:25,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-10-04 09:19:25,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-10-04 09:19:25,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-10-04 09:19:25,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-10-04 09:19:25,013 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2018-10-04 09:19:25,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:19:25,013 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-10-04 09:19:25,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-04 09:19:25,013 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-10-04 09:19:25,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-10-04 09:19:25,014 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:19:25,014 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 1, 1, 1] [2018-10-04 09:19:25,014 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:19:25,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:19:25,014 INFO L82 PathProgramCache]: Analyzing trace with hash -752105711, now seen corresponding path program 105 times [2018-10-04 09:19:25,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:19:25,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:19:25,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:25,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:19:25,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:25,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:19:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:29,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:19:29,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:19:29,261 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:19:29,391 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-10-04 09:19:29,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:19:29,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:19:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:29,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:19:29,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-04 09:19:29,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-04 09:19:29,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-04 09:19:29,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-04 09:19:29,460 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 108 states. [2018-10-04 09:19:29,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:19:29,854 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2018-10-04 09:19:29,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-04 09:19:29,854 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 214 [2018-10-04 09:19:29,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:19:29,855 INFO L225 Difference]: With dead ends: 219 [2018-10-04 09:19:29,855 INFO L226 Difference]: Without dead ends: 217 [2018-10-04 09:19:29,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-04 09:19:29,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-10-04 09:19:29,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-10-04 09:19:29,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-10-04 09:19:29,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2018-10-04 09:19:29,859 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 214 [2018-10-04 09:19:29,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:19:29,859 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2018-10-04 09:19:29,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-04 09:19:29,859 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2018-10-04 09:19:29,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-10-04 09:19:29,860 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:19:29,860 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 1, 1, 1] [2018-10-04 09:19:29,861 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:19:29,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:19:29,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1219030453, now seen corresponding path program 106 times [2018-10-04 09:19:29,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:19:29,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:19:29,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:29,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:19:29,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:19:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:34,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:19:34,109 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:19:34,116 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:19:34,170 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:19:34,171 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:19:34,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:19:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:34,251 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:19:34,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-10-04 09:19:34,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-10-04 09:19:34,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-10-04 09:19:34,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-04 09:19:34,252 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 109 states. [2018-10-04 09:19:34,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:19:34,570 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-10-04 09:19:34,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-04 09:19:34,570 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 216 [2018-10-04 09:19:34,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:19:34,571 INFO L225 Difference]: With dead ends: 221 [2018-10-04 09:19:34,571 INFO L226 Difference]: Without dead ends: 219 [2018-10-04 09:19:34,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-04 09:19:34,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-04 09:19:34,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-10-04 09:19:34,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-04 09:19:34,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-10-04 09:19:34,576 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 216 [2018-10-04 09:19:34,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:19:34,576 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-10-04 09:19:34,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-10-04 09:19:34,576 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-10-04 09:19:34,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-04 09:19:34,577 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:19:34,577 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 1, 1, 1] [2018-10-04 09:19:34,577 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:19:34,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:19:34,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1037858565, now seen corresponding path program 107 times [2018-10-04 09:19:34,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:19:34,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:19:34,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:34,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:19:34,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:19:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:38,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:19:38,946 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:19:38,955 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:19:39,073 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) [2018-10-04 09:19:39,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:19:39,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:19:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:39,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:19:39,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-10-04 09:19:39,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-04 09:19:39,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-04 09:19:39,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-04 09:19:39,142 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 110 states. [2018-10-04 09:19:39,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:19:39,513 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-10-04 09:19:39,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-04 09:19:39,514 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 218 [2018-10-04 09:19:39,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:19:39,515 INFO L225 Difference]: With dead ends: 223 [2018-10-04 09:19:39,515 INFO L226 Difference]: Without dead ends: 221 [2018-10-04 09:19:39,515 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-04 09:19:39,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-04 09:19:39,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-10-04 09:19:39,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-10-04 09:19:39,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2018-10-04 09:19:39,520 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 218 [2018-10-04 09:19:39,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:19:39,520 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2018-10-04 09:19:39,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-04 09:19:39,520 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2018-10-04 09:19:39,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-10-04 09:19:39,521 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:19:39,521 INFO L375 BasicCegarLoop]: trace histogram [109, 108, 1, 1, 1] [2018-10-04 09:19:39,521 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:19:39,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:19:39,522 INFO L82 PathProgramCache]: Analyzing trace with hash 949720383, now seen corresponding path program 108 times [2018-10-04 09:19:39,522 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:19:39,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:19:39,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:39,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:19:39,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:19:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:43,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:19:43,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:19:44,005 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:19:44,133 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 109 check-sat command(s) [2018-10-04 09:19:44,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:19:44,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:19:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:44,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:19:44,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-10-04 09:19:44,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-10-04 09:19:44,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-10-04 09:19:44,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-10-04 09:19:44,202 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 111 states. [2018-10-04 09:19:44,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:19:44,675 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-10-04 09:19:44,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-10-04 09:19:44,675 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 220 [2018-10-04 09:19:44,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:19:44,676 INFO L225 Difference]: With dead ends: 225 [2018-10-04 09:19:44,676 INFO L226 Difference]: Without dead ends: 223 [2018-10-04 09:19:44,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-10-04 09:19:44,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-10-04 09:19:44,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-10-04 09:19:44,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-10-04 09:19:44,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-10-04 09:19:44,680 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 220 [2018-10-04 09:19:44,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:19:44,681 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-10-04 09:19:44,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-10-04 09:19:44,681 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-10-04 09:19:44,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-04 09:19:44,682 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:19:44,682 INFO L375 BasicCegarLoop]: trace histogram [110, 109, 1, 1, 1] [2018-10-04 09:19:44,682 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:19:44,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:19:44,682 INFO L82 PathProgramCache]: Analyzing trace with hash -2146693895, now seen corresponding path program 109 times [2018-10-04 09:19:44,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:19:44,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:19:44,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:44,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:19:44,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:19:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:49,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:19:49,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:19:49,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:19:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:19:49,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:19:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:49,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:19:49,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-10-04 09:19:49,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-04 09:19:49,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-04 09:19:49,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-10-04 09:19:49,344 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 112 states. [2018-10-04 09:19:49,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:19:49,813 INFO L93 Difference]: Finished difference Result 227 states and 227 transitions. [2018-10-04 09:19:49,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-04 09:19:49,813 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 222 [2018-10-04 09:19:49,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:19:49,814 INFO L225 Difference]: With dead ends: 227 [2018-10-04 09:19:49,814 INFO L226 Difference]: Without dead ends: 225 [2018-10-04 09:19:49,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-10-04 09:19:49,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-10-04 09:19:49,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-10-04 09:19:49,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-10-04 09:19:49,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2018-10-04 09:19:49,817 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 222 [2018-10-04 09:19:49,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:19:49,817 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2018-10-04 09:19:49,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-04 09:19:49,817 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2018-10-04 09:19:49,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-10-04 09:19:49,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:19:49,818 INFO L375 BasicCegarLoop]: trace histogram [111, 110, 1, 1, 1] [2018-10-04 09:19:49,818 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:19:49,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:19:49,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1388478925, now seen corresponding path program 110 times [2018-10-04 09:19:49,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:19:49,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:19:49,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:49,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:19:49,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:49,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:19:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:54,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:19:54,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:19:54,461 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:19:54,513 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:19:54,513 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:19:54,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:19:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:19:54,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:19:54,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-10-04 09:19:54,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-10-04 09:19:54,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-10-04 09:19:54,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-10-04 09:19:54,579 INFO L87 Difference]: Start difference. First operand 225 states and 225 transitions. Second operand 113 states. [2018-10-04 09:19:55,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:19:55,070 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-10-04 09:19:55,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-10-04 09:19:55,071 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 224 [2018-10-04 09:19:55,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:19:55,071 INFO L225 Difference]: With dead ends: 229 [2018-10-04 09:19:55,071 INFO L226 Difference]: Without dead ends: 227 [2018-10-04 09:19:55,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-10-04 09:19:55,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-10-04 09:19:55,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-10-04 09:19:55,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-10-04 09:19:55,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-10-04 09:19:55,074 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 224 [2018-10-04 09:19:55,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:19:55,075 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-10-04 09:19:55,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-10-04 09:19:55,075 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-10-04 09:19:55,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-10-04 09:19:55,075 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:19:55,075 INFO L375 BasicCegarLoop]: trace histogram [112, 111, 1, 1, 1] [2018-10-04 09:19:55,076 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:19:55,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:19:55,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1406634221, now seen corresponding path program 111 times [2018-10-04 09:19:55,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:19:55,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:19:55,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:55,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:19:55,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:19:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-04 09:19:58,140 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 09:19:58,145 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 09:19:58,145 INFO L202 PluginConnector]: Adding new model count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 09:19:58 BoogieIcfgContainer [2018-10-04 09:19:58,145 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 09:19:58,146 INFO L168 Benchmark]: Toolchain (without parser) took 235332.67 ms. Allocated memory was 1.6 GB in the beginning and 1.4 GB in the end (delta: -109.1 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 309.8 MB). Peak memory consumption was 200.8 MB. Max. memory is 7.1 GB. [2018-10-04 09:19:58,147 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:19:58,147 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.27 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:19:58,147 INFO L168 Benchmark]: Boogie Preprocessor took 23.07 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:19:58,147 INFO L168 Benchmark]: RCFGBuilder took 294.88 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 09:19:58,148 INFO L168 Benchmark]: TraceAbstraction took 234966.90 ms. Allocated memory was 1.6 GB in the beginning and 1.4 GB in the end (delta: -109.1 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 288.7 MB). Peak memory consumption was 179.6 MB. Max. memory is 7.1 GB. [2018-10-04 09:19:58,150 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.27 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.07 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 294.88 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 234966.90 ms. Allocated memory was 1.6 GB in the beginning and 1.4 GB in the end (delta: -109.1 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 288.7 MB). Peak memory consumption was 179.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 31]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 31). Cancelled while BasicCegarLoop was analyzing trace of length 227 with TraceHistMax 112, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 91 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 234.9s OverallTime, 112 OverallIterations, 112 TraceHistogramMax, 23.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 444 SDtfs, 0 SDslu, 9989 SDs, 0 SdLazy, 10100 SolverSat, 185 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18867 GetRequests, 12651 SyntacticMatches, 0 SemanticMatches, 6216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 189.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=227occurred in iteration=111, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 111 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 6.8s SatisfiabilityAnalysisTime, 195.0s InterpolantComputationTime, 25304 NumberOfCodeBlocks, 25304 NumberOfCodeBlocksAsserted, 3264 NumberOfCheckSat, 25083 ConstructedInterpolants, 0 QuantifiedInterpolants, 11189001 SizeOfPredicates, 110 NumberOfNonLiveVariables, 25850 ConjunctsInSsa, 6325 ConjunctsInUnsatCore, 221 InterpolantComputations, 1 PerfectInterpolantSequences, 0/911680 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_09-19-58-158.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_09-19-58-158.csv Completed graceful shutdown