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/array2.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:11:36,641 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:11:36,643 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:11:36,661 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:11:36,661 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:11:36,662 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:11:36,664 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:11:36,666 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:11:36,669 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:11:36,670 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:11:36,678 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 20:11:36,725 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 20:11:36,754 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:11:36,754 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:11:36,755 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:11:36,756 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:11:36,756 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:11:36,757 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:11:36,758 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:11:36,758 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:11:36,758 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:11:36,758 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:11:36,758 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:11:36,759 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:11:36,759 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:11:36,759 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:11:36,759 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:11:36,760 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:11:36,760 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:11:36,760 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:11:36,761 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:11:36,761 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:11:36,761 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:11:36,761 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:11:36,761 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:11:36,762 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:11:36,762 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:11:36,762 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:11:36,764 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:11:36,764 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:11:36,765 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:11:36,765 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:11:36,831 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:11:36,845 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:11:36,850 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:11:36,852 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:11:36,853 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:11:36,853 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array2.i_3.bpl [2018-09-30 20:11:36,854 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array2.i_3.bpl' [2018-09-30 20:11:36,914 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:11:36,918 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:11:36,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:11:36,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:11:36,919 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:11:36,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:11:36" (1/1) ... [2018-09-30 20:11:36,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:11:36" (1/1) ... [2018-09-30 20:11:36,965 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:11:36,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:11:36,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:11:36,966 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:11:36,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:11:36" (1/1) ... [2018-09-30 20:11:36,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:11:36" (1/1) ... [2018-09-30 20:11:36,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:11:36" (1/1) ... [2018-09-30 20:11:36,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:11:36" (1/1) ... [2018-09-30 20:11:36,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:11:36" (1/1) ... [2018-09-30 20:11:36,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:11:36" (1/1) ... [2018-09-30 20:11:36,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:11:36" (1/1) ... [2018-09-30 20:11:36,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:11:36,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:11:36,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:11:36,987 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:11:36,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:11:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:11:37,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 20:11:37,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 20:11:37,259 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 20:11:37,260 INFO L202 PluginConnector]: Adding new model array2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:11:37 BoogieIcfgContainer [2018-09-30 20:11:37,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:11:37,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:11:37,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:11:37,264 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:11:37,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:11:36" (1/2) ... [2018-09-30 20:11:37,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ae0b695 and model type array2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:11:37, skipping insertion in model container [2018-09-30 20:11:37,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:11:37" (2/2) ... [2018-09-30 20:11:37,268 INFO L112 eAbstractionObserver]: Analyzing ICFG array2.i_3.bpl [2018-09-30 20:11:37,277 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:11:37,285 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:11:37,337 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:11:37,338 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:11:37,338 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:11:37,338 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:11:37,338 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:11:37,339 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:11:37,339 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:11:37,339 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:11:37,339 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:11:37,355 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 20:11:37,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 20:11:37,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:37,362 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 20:11:37,364 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:37,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:37,370 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-30 20:11:37,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:37,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:37,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:37,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:37,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:37,516 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:11:37,516 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 20:11:37,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:11:37,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:11:37,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:11:37,538 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 20:11:37,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:37,591 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 20:11:37,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:11:37,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-30 20:11:37,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:37,604 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:11:37,605 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 20:11:37,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:11:37,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 20:11:37,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 20:11:37,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 20:11:37,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 20:11:37,652 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-30 20:11:37,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:37,653 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 20:11:37,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:11:37,655 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 20:11:37,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 20:11:37,656 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:37,656 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-30 20:11:37,657 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:37,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:37,657 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-30 20:11:37,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:37,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:37,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:37,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:37,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:37,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:37,793 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:37,793 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:37,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:37,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:37,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:37,932 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:37,933 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 20:11:37,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:11:37,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:11:37,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:11:37,935 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-30 20:11:38,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:38,017 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 20:11:38,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:11:38,018 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 20:11:38,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:38,019 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:11:38,019 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 20:11:38,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:11:38,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 20:11:38,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 20:11:38,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 20:11:38,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 20:11:38,023 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-30 20:11:38,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:38,024 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 20:11:38,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:11:38,024 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 20:11:38,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 20:11:38,025 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:38,025 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-30 20:11:38,025 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:38,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:38,026 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-30 20:11:38,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:38,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:38,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:38,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:38,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:38,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:38,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:38,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:38,276 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:11:38,300 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:11:38,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:38,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:38,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:38,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:38,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 20:11:38,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:11:38,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:11:38,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:11:38,340 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-30 20:11:38,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:38,406 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 20:11:38,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:11:38,407 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-30 20:11:38,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:38,407 INFO L225 Difference]: With dead ends: 13 [2018-09-30 20:11:38,408 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:11:38,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:11:38,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:11:38,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 20:11:38,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 20:11:38,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 20:11:38,412 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-30 20:11:38,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:38,413 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 20:11:38,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:11:38,413 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 20:11:38,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:11:38,413 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:38,414 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-30 20:11:38,414 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:38,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:38,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-30 20:11:38,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:38,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:38,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:38,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:38,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:38,530 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:38,530 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-30 20:11:38,548 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:38,586 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 20:11:38,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:38,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:38,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:38,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 20:11:38,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:11:38,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:11:38,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:11:38,624 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-30 20:11:38,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:38,697 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 20:11:38,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:11:38,699 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-30 20:11:38,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:38,700 INFO L225 Difference]: With dead ends: 15 [2018-09-30 20:11:38,700 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 20:11:38,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:11:38,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 20:11:38,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 20:11:38,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 20:11:38,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 20:11:38,705 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-30 20:11:38,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:38,706 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 20:11:38,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:11:38,706 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 20:11:38,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 20:11:38,707 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:38,707 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-30 20:11:38,707 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:38,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:38,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-30 20:11:38,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:38,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:38,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:38,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:38,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:39,014 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:39,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:39,024 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:11:39,053 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:11:39,054 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:39,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:39,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:39,089 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:39,089 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:11:39,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:11:39,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:11:39,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:11:39,090 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-30 20:11:39,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:39,127 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 20:11:39,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:11:39,128 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-30 20:11:39,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:39,129 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:11:39,129 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 20:11:39,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:11:39,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 20:11:39,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 20:11:39,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 20:11:39,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 20:11:39,134 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-30 20:11:39,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:39,135 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 20:11:39,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:11:39,135 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 20:11:39,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:11:39,136 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:39,136 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-30 20:11:39,136 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:39,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:39,137 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-30 20:11:39,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:39,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:39,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:39,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:39,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:39,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:39,292 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:39,293 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:39,302 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:11:39,396 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 20:11:39,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:39,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:39,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:39,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:11:39,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:11:39,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:11:39,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:11:39,436 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-30 20:11:39,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:39,477 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 20:11:39,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:11:39,478 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-30 20:11:39,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:39,479 INFO L225 Difference]: With dead ends: 19 [2018-09-30 20:11:39,479 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 20:11:39,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:11:39,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 20:11:39,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 20:11:39,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 20:11:39,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 20:11:39,484 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-30 20:11:39,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:39,485 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 20:11:39,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:11:39,485 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 20:11:39,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 20:11:39,486 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:39,486 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-30 20:11:39,486 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:39,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:39,487 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-30 20:11:39,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:39,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:39,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:39,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:39,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:39,632 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:39,633 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:39,646 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:11:39,679 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:11:39,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:39,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:39,715 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:39,715 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:11:39,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:11:39,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:11:39,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:11:39,717 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-30 20:11:39,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:39,757 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 20:11:39,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:11:39,759 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-30 20:11:39,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:39,760 INFO L225 Difference]: With dead ends: 21 [2018-09-30 20:11:39,760 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 20:11:39,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:11:39,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 20:11:39,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 20:11:39,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 20:11:39,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 20:11:39,765 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-30 20:11:39,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:39,765 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 20:11:39,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:11:39,766 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 20:11:39,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:11:39,766 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:39,767 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-30 20:11:39,767 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:39,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:39,767 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-30 20:11:39,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:39,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:39,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:39,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:39,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:40,271 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:40,271 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-30 20:11:40,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:40,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:40,358 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:40,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:11:40,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:11:40,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:11:40,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:11:40,360 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-30 20:11:40,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:40,406 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 20:11:40,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:11:40,408 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-30 20:11:40,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:40,408 INFO L225 Difference]: With dead ends: 23 [2018-09-30 20:11:40,408 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 20:11:40,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:11:40,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 20:11:40,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 20:11:40,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 20:11:40,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 20:11:40,413 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-30 20:11:40,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:40,414 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 20:11:40,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:11:40,414 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 20:11:40,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 20:11:40,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:40,415 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-30 20:11:40,415 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:40,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:40,416 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-30 20:11:40,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:40,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:40,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:40,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:40,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:40,672 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:40,673 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-30 20:11:40,690 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:40,726 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:11:40,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:40,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:40,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:40,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:11:40,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:11:40,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:11:40,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:11:40,761 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-30 20:11:40,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:40,820 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 20:11:40,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:11:40,821 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-30 20:11:40,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:40,822 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:11:40,822 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 20:11:40,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:11:40,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 20:11:40,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 20:11:40,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 20:11:40,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 20:11:40,828 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-30 20:11:40,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:40,828 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 20:11:40,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:11:40,828 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 20:11:40,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 20:11:40,829 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:40,829 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-30 20:11:40,829 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:40,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:40,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-30 20:11:40,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:40,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:40,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:40,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:40,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:40,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:40,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:41,001 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:11:41,027 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 20:11:41,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:41,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:41,068 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:41,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 20:11:41,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:11:41,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:11:41,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:11:41,070 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-09-30 20:11:41,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:41,147 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 20:11:41,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:11:41,147 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-30 20:11:41,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:41,148 INFO L225 Difference]: With dead ends: 27 [2018-09-30 20:11:41,148 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 20:11:41,148 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 [2018-09-30 20:11:41,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 20:11:41,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 20:11:41,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 20:11:41,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 20:11:41,154 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-30 20:11:41,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:41,154 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 20:11:41,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:11:41,155 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 20:11:41,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 20:11:41,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:41,155 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-30 20:11:41,156 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:41,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:41,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-09-30 20:11:41,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:41,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:41,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:41,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:41,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:41,380 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:41,380 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:41,391 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:11:41,424 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:11:41,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:41,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:41,457 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:41,457 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 20:11:41,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:11:41,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:11:41,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:11:41,458 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-09-30 20:11:41,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:41,505 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 20:11:41,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:11:41,505 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-30 20:11:41,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:41,506 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:11:41,506 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:11:41,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:11:41,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:11:41,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 20:11:41,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 20:11:41,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 20:11:41,512 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-30 20:11:41,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:41,513 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 20:11:41,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:11:41,513 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 20:11:41,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 20:11:41,514 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:41,514 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-30 20:11:41,514 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:41,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:41,515 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-09-30 20:11:41,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:41,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:41,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:41,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:41,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:41,725 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:41,725 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:41,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:41,734 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:11:41,791 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 20:11:41,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:41,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:41,804 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:41,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:41,834 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 20:11:41,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:11:41,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:11:41,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:11:41,836 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-09-30 20:11:42,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:42,024 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 20:11:42,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:11:42,024 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-30 20:11:42,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:42,025 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:11:42,025 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:11:42,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:11:42,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:11:42,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 20:11:42,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 20:11:42,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 20:11:42,031 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-30 20:11:42,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:42,031 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 20:11:42,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:11:42,032 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 20:11:42,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 20:11:42,032 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:42,032 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-30 20:11:42,033 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:42,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:42,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-09-30 20:11:42,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:42,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:42,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:42,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:42,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:42,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:42,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:42,352 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:11:42,560 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 20:11:42,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:42,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:42,589 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:42,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:42,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 20:11:42,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:11:42,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:11:42,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:11:42,637 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-09-30 20:11:42,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:42,912 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 20:11:42,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:11:42,913 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-30 20:11:42,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:42,914 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:11:42,914 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:11:42,915 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 [2018-09-30 20:11:42,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:11:42,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 20:11:42,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 20:11:42,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 20:11:42,921 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-30 20:11:42,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:42,922 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 20:11:42,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:11:42,922 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 20:11:42,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 20:11:42,923 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:42,923 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-30 20:11:42,923 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:42,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:42,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-09-30 20:11:42,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:42,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:42,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:42,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:42,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:42,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:43,361 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:43,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:43,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:43,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:43,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:43,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:43,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 20:11:43,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:11:43,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:11:43,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:11:43,435 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-09-30 20:11:43,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:43,485 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 20:11:43,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:11:43,486 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-30 20:11:43,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:43,487 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:11:43,487 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:11:43,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:11:43,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:11:43,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 20:11:43,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 20:11:43,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 20:11:43,492 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-30 20:11:43,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:43,492 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 20:11:43,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:11:43,493 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 20:11:43,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 20:11:43,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:43,494 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-30 20:11:43,494 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:43,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:43,494 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-09-30 20:11:43,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:43,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:43,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:43,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:43,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:43,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:43,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:43,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:43,783 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:11:43,806 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:11:43,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:43,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:43,841 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:43,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 20:11:43,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:11:43,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:11:43,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:11:43,842 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-09-30 20:11:43,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:43,893 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 20:11:43,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:11:43,893 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-30 20:11:43,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:43,894 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:11:43,894 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:11:43,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:11:43,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:11:43,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 20:11:43,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 20:11:43,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 20:11:43,899 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-30 20:11:43,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:43,900 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 20:11:43,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:11:43,900 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 20:11:43,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 20:11:43,901 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:43,901 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-30 20:11:43,901 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:43,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:43,901 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-09-30 20:11:43,901 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:43,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:43,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:43,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:43,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:43,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:44,108 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:44,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:44,116 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:11:44,166 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 20:11:44,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:44,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:44,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:44,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 20:11:44,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:11:44,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:11:44,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:11:44,215 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-09-30 20:11:44,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:44,294 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 20:11:44,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:11:44,296 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-30 20:11:44,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:44,297 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:11:44,297 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:11:44,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:11:44,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:11:44,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 20:11:44,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 20:11:44,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 20:11:44,301 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-30 20:11:44,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:44,302 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 20:11:44,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:11:44,302 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 20:11:44,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 20:11:44,303 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:44,303 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-30 20:11:44,303 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:44,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:44,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-09-30 20:11:44,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:44,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:44,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:44,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:44,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:44,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:44,737 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:44,737 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:44,744 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:11:44,774 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:11:44,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:44,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:44,809 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:44,809 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 20:11:44,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:11:44,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:11:44,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:11:44,810 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-09-30 20:11:44,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:44,856 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 20:11:44,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:11:44,856 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-30 20:11:44,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:44,857 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:11:44,857 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:11:44,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:11:44,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:11:44,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 20:11:44,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 20:11:44,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 20:11:44,863 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-30 20:11:44,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:44,863 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 20:11:44,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:11:44,864 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 20:11:44,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 20:11:44,864 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:44,865 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-30 20:11:44,865 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:44,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:44,865 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-09-30 20:11:44,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:44,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:44,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:44,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:44,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:45,458 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:45,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:45,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:45,466 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:11:45,582 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 20:11:45,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:45,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:45,598 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:45,631 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:45,631 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 20:11:45,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:11:45,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:11:45,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:11:45,632 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-09-30 20:11:45,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:45,971 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 20:11:45,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:11:45,971 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-30 20:11:45,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:45,972 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:11:45,972 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:11:45,972 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 [2018-09-30 20:11:45,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:11:45,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 20:11:45,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 20:11:45,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 20:11:45,980 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-30 20:11:45,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:45,980 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 20:11:45,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:11:45,981 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 20:11:45,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 20:11:45,981 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:45,981 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-09-30 20:11:45,982 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:45,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:45,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-09-30 20:11:45,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:45,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:45,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:45,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:45,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:46,265 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:46,265 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:46,272 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:11:46,322 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 20:11:46,323 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:46,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:46,336 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:46,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:46,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 20:11:46,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 20:11:46,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 20:11:46,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:11:46,361 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-09-30 20:11:46,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:46,456 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 20:11:46,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:11:46,457 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-30 20:11:46,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:46,458 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:11:46,458 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:11:46,459 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 [2018-09-30 20:11:46,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:11:46,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 20:11:46,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 20:11:46,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 20:11:46,463 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-30 20:11:46,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:46,463 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 20:11:46,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 20:11:46,463 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 20:11:46,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 20:11:46,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:46,464 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-30 20:11:46,464 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:46,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:46,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-09-30 20:11:46,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:46,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:46,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:46,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:46,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:46,746 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:46,746 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:46,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:46,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:46,814 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:46,814 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 20:11:46,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:11:46,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:11:46,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:11:46,815 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-09-30 20:11:46,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:46,872 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 20:11:46,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:11:46,872 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-30 20:11:46,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:46,873 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:11:46,873 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:11:46,874 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 [2018-09-30 20:11:46,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:11:46,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 20:11:46,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 20:11:46,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 20:11:46,880 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-30 20:11:46,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:46,880 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 20:11:46,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:11:46,880 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 20:11:46,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 20:11:46,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:46,881 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-09-30 20:11:46,881 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:46,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:46,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-09-30 20:11:46,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:46,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:46,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:46,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:46,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:47,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:47,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:47,274 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:11:47,297 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:11:47,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:47,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:47,312 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:47,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:47,333 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 20:11:47,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 20:11:47,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 20:11:47,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:11:47,334 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-09-30 20:11:47,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:47,428 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 20:11:47,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:11:47,429 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-30 20:11:47,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:47,430 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:11:47,430 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:11:47,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:11:47,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:11:47,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 20:11:47,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 20:11:47,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 20:11:47,435 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-30 20:11:47,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:47,435 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 20:11:47,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 20:11:47,435 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 20:11:47,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 20:11:47,436 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:47,436 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-30 20:11:47,436 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:47,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:47,437 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-09-30 20:11:47,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:47,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:47,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:47,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:47,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:48,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:48,456 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:48,465 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:11:48,562 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 20:11:48,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:48,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:48,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:48,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 20:11:48,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:11:48,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:11:48,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:11:48,608 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-09-30 20:11:48,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:48,870 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 20:11:48,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:11:48,873 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-30 20:11:48,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:48,874 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:11:48,874 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:11:48,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:11:48,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:11:48,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 20:11:48,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 20:11:48,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 20:11:48,878 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-30 20:11:48,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:48,878 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 20:11:48,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:11:48,878 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 20:11:48,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 20:11:48,879 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:48,879 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-09-30 20:11:48,879 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:48,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:48,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-09-30 20:11:48,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:48,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:48,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:48,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:48,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:49,306 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:49,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:49,313 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:11:49,340 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:11:49,340 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:49,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:49,358 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:49,379 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:49,379 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 20:11:49,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 20:11:49,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 20:11:49,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:11:49,381 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-09-30 20:11:49,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:49,449 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 20:11:49,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:11:49,450 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-30 20:11:49,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:49,451 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:11:49,451 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:11:49,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:11:49,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:11:49,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 20:11:49,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 20:11:49,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 20:11:49,456 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-30 20:11:49,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:49,456 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 20:11:49,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 20:11:49,457 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 20:11:49,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 20:11:49,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:49,457 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-30 20:11:49,458 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:49,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:49,458 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-09-30 20:11:49,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:49,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:49,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:49,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:49,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:50,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:50,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:50,513 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:11:50,613 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 20:11:50,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:50,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:50,628 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:50,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:50,659 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 20:11:50,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:11:50,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:11:50,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:11:50,660 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-09-30 20:11:50,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:50,992 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 20:11:50,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:11:50,992 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-30 20:11:50,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:50,993 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:11:50,993 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:11:50,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:11:50,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:11:50,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 20:11:50,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 20:11:50,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 20:11:50,998 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-30 20:11:50,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:50,999 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 20:11:50,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:11:50,999 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 20:11:50,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 20:11:50,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:50,999 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-09-30 20:11:51,000 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:51,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:51,000 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-09-30 20:11:51,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:51,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:51,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:51,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:51,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:51,997 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:51,997 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:52,004 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:11:52,074 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 20:11:52,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:52,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:52,120 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:52,120 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 20:11:52,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 20:11:52,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 20:11:52,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:11:52,121 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-09-30 20:11:52,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:52,187 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 20:11:52,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:11:52,188 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-30 20:11:52,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:52,189 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:11:52,189 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:11:52,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:11:52,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:11:52,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 20:11:52,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 20:11:52,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 20:11:52,194 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-30 20:11:52,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:52,195 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 20:11:52,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 20:11:52,195 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 20:11:52,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 20:11:52,196 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:52,196 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-09-30 20:11:52,196 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:52,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:52,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-09-30 20:11:52,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:52,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:52,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:52,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:52,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:53,060 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:53,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:53,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:53,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:53,144 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:53,145 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 20:11:53,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 20:11:53,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 20:11:53,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 20:11:53,146 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-09-30 20:11:53,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:53,206 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 20:11:53,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 20:11:53,206 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-30 20:11:53,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:53,207 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:11:53,207 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:11:53,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 20:11:53,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:11:53,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 20:11:53,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 20:11:53,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 20:11:53,212 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-30 20:11:53,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:53,212 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 20:11:53,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 20:11:53,212 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 20:11:53,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 20:11:53,213 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:53,213 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-09-30 20:11:53,213 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:53,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:53,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-09-30 20:11:53,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:53,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:53,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:53,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:53,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:54,265 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:54,265 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:54,278 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:11:54,310 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:11:54,310 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:54,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:54,356 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:54,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 20:11:54,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:11:54,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:11:54,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:11:54,358 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-09-30 20:11:54,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:54,454 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 20:11:54,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:11:54,454 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-30 20:11:54,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:54,455 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:11:54,455 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:11:54,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:11:54,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:11:54,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 20:11:54,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 20:11:54,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 20:11:54,458 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-30 20:11:54,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:54,458 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 20:11:54,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:11:54,458 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 20:11:54,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 20:11:54,459 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:54,460 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-09-30 20:11:54,466 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:54,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:54,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-09-30 20:11:54,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:54,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:54,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:54,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:54,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:54,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:54,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:54,941 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:11:55,029 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 20:11:55,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:55,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:55,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:55,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 20:11:55,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:11:55,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:11:55,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:11:55,074 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-09-30 20:11:55,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:55,246 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 20:11:55,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 20:11:55,246 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-30 20:11:55,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:55,247 INFO L225 Difference]: With dead ends: 63 [2018-09-30 20:11:55,247 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 20:11:55,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:11:55,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 20:11:55,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 20:11:55,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 20:11:55,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 20:11:55,251 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-30 20:11:55,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:55,251 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 20:11:55,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:11:55,251 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 20:11:55,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 20:11:55,252 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:55,252 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-09-30 20:11:55,252 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:55,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:55,252 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-09-30 20:11:55,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:55,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:55,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:55,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:55,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:56,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:56,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:56,234 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:11:56,284 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:11:56,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:56,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:56,304 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:56,327 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:56,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 20:11:56,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 20:11:56,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 20:11:56,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 20:11:56,329 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-09-30 20:11:56,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:56,410 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 20:11:56,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:11:56,411 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-30 20:11:56,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:56,412 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:11:56,412 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 20:11:56,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 20:11:56,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 20:11:56,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 20:11:56,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 20:11:56,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 20:11:56,417 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-30 20:11:56,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:56,417 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 20:11:56,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 20:11:56,417 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 20:11:56,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 20:11:56,418 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:56,418 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-09-30 20:11:56,418 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:56,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:56,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-09-30 20:11:56,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:56,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:56,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:56,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:56,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:56,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:56,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:56,993 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:11:57,170 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 20:11:57,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:57,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:57,203 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:57,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 20:11:57,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 20:11:57,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 20:11:57,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 20:11:57,205 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-09-30 20:11:57,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:57,263 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 20:11:57,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:11:57,264 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-30 20:11:57,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:57,265 INFO L225 Difference]: With dead ends: 67 [2018-09-30 20:11:57,265 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 20:11:57,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 20:11:57,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 20:11:57,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 20:11:57,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 20:11:57,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 20:11:57,270 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-09-30 20:11:57,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:57,270 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 20:11:57,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 20:11:57,270 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 20:11:57,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 20:11:57,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:57,271 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-09-30 20:11:57,271 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:57,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:57,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-09-30 20:11:57,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:57,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:57,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:57,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:57,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:57,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:57,827 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:57,837 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:11:57,941 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 20:11:57,941 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:57,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:57,984 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:57,985 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 20:11:57,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 20:11:57,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 20:11:57,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 20:11:57,986 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-09-30 20:11:58,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:58,142 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 20:11:58,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 20:11:58,143 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-30 20:11:58,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:58,144 INFO L225 Difference]: With dead ends: 69 [2018-09-30 20:11:58,144 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 20:11:58,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 20:11:58,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 20:11:58,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 20:11:58,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 20:11:58,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 20:11:58,147 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-09-30 20:11:58,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:58,148 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 20:11:58,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 20:11:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 20:11:58,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 20:11:58,148 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:58,148 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-09-30 20:11:58,149 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:58,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:58,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-09-30 20:11:58,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:58,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:58,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:58,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:58,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:58,872 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:58,872 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:58,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:58,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:58,961 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:58,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 20:11:58,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 20:11:58,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 20:11:58,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:11:58,963 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-09-30 20:11:59,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:59,030 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 20:11:59,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:11:59,031 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-30 20:11:59,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:59,032 INFO L225 Difference]: With dead ends: 71 [2018-09-30 20:11:59,032 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 20:11:59,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:11:59,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 20:11:59,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 20:11:59,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 20:11:59,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 20:11:59,036 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-09-30 20:11:59,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:59,036 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 20:11:59,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 20:11:59,036 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 20:11:59,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 20:11:59,037 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:59,037 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-09-30 20:11:59,037 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:59,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:59,037 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-09-30 20:11:59,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:59,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:59,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:59,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:59,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:59,571 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:59,571 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:59,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:11:59,622 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:11:59,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:59,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:59,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:59,657 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:59,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 20:11:59,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 20:11:59,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 20:11:59,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 20:11:59,659 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-09-30 20:11:59,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:59,723 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 20:11:59,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:11:59,724 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-30 20:11:59,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:59,724 INFO L225 Difference]: With dead ends: 73 [2018-09-30 20:11:59,725 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 20:11:59,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 20:11:59,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 20:11:59,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 20:11:59,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 20:11:59,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 20:11:59,729 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-09-30 20:11:59,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:59,729 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 20:11:59,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 20:11:59,729 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 20:11:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 20:11:59,730 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:59,730 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-09-30 20:11:59,730 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:59,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:59,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-09-30 20:11:59,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:59,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:59,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:59,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:59,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:00,550 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:00,551 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:00,559 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:12:00,695 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 20:12:00,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:00,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:00,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:00,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:00,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 20:12:00,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 20:12:00,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 20:12:00,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 20:12:00,744 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-09-30 20:12:00,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:00,832 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 20:12:00,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:12:00,832 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-30 20:12:00,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:00,833 INFO L225 Difference]: With dead ends: 75 [2018-09-30 20:12:00,833 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 20:12:00,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 20:12:00,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 20:12:00,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 20:12:00,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 20:12:00,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 20:12:00,837 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-09-30 20:12:00,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:00,837 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 20:12:00,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 20:12:00,838 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 20:12:00,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 20:12:00,838 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:00,838 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-09-30 20:12:00,839 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:00,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:00,839 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-09-30 20:12:00,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:00,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:00,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:00,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:00,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:00,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:02,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:02,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:02,193 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:12:02,229 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:12:02,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:02,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:02,271 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:02,271 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 20:12:02,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 20:12:02,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 20:12:02,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 20:12:02,272 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-09-30 20:12:02,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:02,443 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 20:12:02,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:12:02,444 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-30 20:12:02,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:02,445 INFO L225 Difference]: With dead ends: 77 [2018-09-30 20:12:02,445 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 20:12:02,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 20:12:02,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 20:12:02,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 20:12:02,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 20:12:02,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 20:12:02,449 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-09-30 20:12:02,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:02,449 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 20:12:02,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 20:12:02,450 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 20:12:02,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 20:12:02,450 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:02,450 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-09-30 20:12:02,451 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:02,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:02,451 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-09-30 20:12:02,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:02,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:02,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:02,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:02,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:03,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:03,258 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:03,266 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:12:03,625 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-30 20:12:03,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:03,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:03,667 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:03,667 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 20:12:03,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:12:03,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:12:03,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:12:03,669 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-09-30 20:12:03,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:03,730 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 20:12:03,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 20:12:03,731 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-30 20:12:03,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:03,731 INFO L225 Difference]: With dead ends: 79 [2018-09-30 20:12:03,732 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 20:12:03,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:12:03,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 20:12:03,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 20:12:03,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 20:12:03,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 20:12:03,736 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-09-30 20:12:03,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:03,736 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 20:12:03,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:12:03,736 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 20:12:03,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 20:12:03,736 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:03,736 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-09-30 20:12:03,737 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:03,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:03,737 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-09-30 20:12:03,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:03,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:03,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:03,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:03,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:04,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:04,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:04,364 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:12:04,520 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 20:12:04,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:04,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:04,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:04,570 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:04,570 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 20:12:04,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 20:12:04,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 20:12:04,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 20:12:04,571 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-09-30 20:12:05,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:05,130 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 20:12:05,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:12:05,131 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-30 20:12:05,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:05,132 INFO L225 Difference]: With dead ends: 81 [2018-09-30 20:12:05,132 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 20:12:05,133 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 [2018-09-30 20:12:05,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 20:12:05,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 20:12:05,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 20:12:05,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 20:12:05,135 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-09-30 20:12:05,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:05,135 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 20:12:05,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 20:12:05,136 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 20:12:05,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 20:12:05,136 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:05,136 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-09-30 20:12:05,136 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:05,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:05,137 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-09-30 20:12:05,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:05,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:05,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:05,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:05,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:05,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:05,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:05,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:12:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:06,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:06,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:06,075 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:06,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 20:12:06,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 20:12:06,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 20:12:06,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 20:12:06,076 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-09-30 20:12:06,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:06,148 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 20:12:06,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 20:12:06,149 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-30 20:12:06,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:06,150 INFO L225 Difference]: With dead ends: 83 [2018-09-30 20:12:06,150 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 20:12:06,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 20:12:06,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 20:12:06,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 20:12:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 20:12:06,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-30 20:12:06,153 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-09-30 20:12:06,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:06,153 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-30 20:12:06,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 20:12:06,153 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-30 20:12:06,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 20:12:06,153 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:06,154 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-09-30 20:12:06,154 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:06,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:06,154 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-09-30 20:12:06,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:06,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:06,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:06,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:12:06,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:06,851 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:06,851 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:06,860 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:12:06,914 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:12:06,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:06,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:06,969 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:06,969 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 20:12:06,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:12:06,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:12:06,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 20:12:06,971 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-09-30 20:12:07,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:07,072 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 20:12:07,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:12:07,072 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-30 20:12:07,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:07,073 INFO L225 Difference]: With dead ends: 85 [2018-09-30 20:12:07,073 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 20:12:07,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 20:12:07,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 20:12:07,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 20:12:07,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 20:12:07,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 20:12:07,077 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-09-30 20:12:07,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:07,077 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 20:12:07,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:12:07,077 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 20:12:07,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 20:12:07,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:07,078 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-09-30 20:12:07,078 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:07,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:07,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-09-30 20:12:07,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:07,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:07,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:07,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:07,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:07,910 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:07,910 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:07,917 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:12:08,126 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 20:12:08,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:08,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:08,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:08,171 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:08,171 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 20:12:08,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 20:12:08,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 20:12:08,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 20:12:08,172 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-09-30 20:12:08,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:08,299 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 20:12:08,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 20:12:08,301 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-30 20:12:08,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:08,302 INFO L225 Difference]: With dead ends: 87 [2018-09-30 20:12:08,302 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 20:12:08,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 20:12:08,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 20:12:08,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 20:12:08,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 20:12:08,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-30 20:12:08,306 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-09-30 20:12:08,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:08,306 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-30 20:12:08,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 20:12:08,306 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-30 20:12:08,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 20:12:08,307 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:08,307 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-09-30 20:12:08,307 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:08,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:08,307 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-09-30 20:12:08,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:08,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:08,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:08,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:08,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:09,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:09,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:09,073 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:12:09,113 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:12:09,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:09,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:09,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:09,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 20:12:09,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 20:12:09,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 20:12:09,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 20:12:09,151 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-09-30 20:12:09,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:09,231 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 20:12:09,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:12:09,232 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-30 20:12:09,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:09,233 INFO L225 Difference]: With dead ends: 89 [2018-09-30 20:12:09,233 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 20:12:09,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 20:12:09,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 20:12:09,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 20:12:09,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 20:12:09,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 20:12:09,238 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-09-30 20:12:09,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:09,238 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 20:12:09,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 20:12:09,238 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 20:12:09,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 20:12:09,239 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:09,239 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-09-30 20:12:09,239 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:09,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:09,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-09-30 20:12:09,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:09,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:09,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:09,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:09,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:10,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:10,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:10,962 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:12:11,509 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-30 20:12:11,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:11,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:11,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:11,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 20:12:11,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 20:12:11,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 20:12:11,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 20:12:11,565 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-09-30 20:12:11,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:11,662 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 20:12:11,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 20:12:11,663 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-30 20:12:11,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:11,664 INFO L225 Difference]: With dead ends: 91 [2018-09-30 20:12:11,664 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 20:12:11,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 20:12:11,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 20:12:11,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 20:12:11,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 20:12:11,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-30 20:12:11,669 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-09-30 20:12:11,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:11,669 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-30 20:12:11,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 20:12:11,669 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-30 20:12:11,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 20:12:11,670 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:11,670 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-09-30 20:12:11,670 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:11,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:11,670 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-09-30 20:12:11,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:11,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:11,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:11,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:11,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:12,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:12,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:12,567 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:12:12,787 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 20:12:12,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:12,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:12,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:12,844 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:12,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 20:12:12,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 20:12:12,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 20:12:12,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 20:12:12,847 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-09-30 20:12:12,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:12,932 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 20:12:12,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 20:12:12,933 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-30 20:12:12,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:12,934 INFO L225 Difference]: With dead ends: 93 [2018-09-30 20:12:12,934 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 20:12:12,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 20:12:12,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 20:12:12,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 20:12:12,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 20:12:12,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 20:12:12,939 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-09-30 20:12:12,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:12,940 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 20:12:12,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 20:12:12,940 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 20:12:12,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 20:12:12,940 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:12,940 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-09-30 20:12:12,941 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:12,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:12,941 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-09-30 20:12:12,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:12,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:12,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:12,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:12,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:12,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:13,838 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:13,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:13,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:12:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:13,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:13,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:13,929 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:13,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 20:12:13,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 20:12:13,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 20:12:13,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 20:12:13,930 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-09-30 20:12:14,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:14,014 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 20:12:14,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 20:12:14,015 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-30 20:12:14,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:14,016 INFO L225 Difference]: With dead ends: 95 [2018-09-30 20:12:14,016 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 20:12:14,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 20:12:14,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 20:12:14,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 20:12:14,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 20:12:14,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-30 20:12:14,019 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-09-30 20:12:14,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:14,019 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-30 20:12:14,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 20:12:14,020 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-30 20:12:14,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 20:12:14,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:14,020 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-09-30 20:12:14,020 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:14,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:14,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-09-30 20:12:14,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:14,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:14,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:14,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:12:14,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:16,932 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:16,932 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:16,941 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:12:16,988 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:12:16,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:16,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:17,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:17,024 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:17,024 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 20:12:17,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:12:17,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:12:17,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 20:12:17,025 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-09-30 20:12:17,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:17,308 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 20:12:17,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:12:17,309 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-30 20:12:17,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:17,310 INFO L225 Difference]: With dead ends: 97 [2018-09-30 20:12:17,310 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 20:12:17,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 20:12:17,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 20:12:17,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 20:12:17,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 20:12:17,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 20:12:17,313 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-09-30 20:12:17,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:17,314 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 20:12:17,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:12:17,314 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 20:12:17,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 20:12:17,314 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:17,314 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-09-30 20:12:17,315 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:17,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:17,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-09-30 20:12:17,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:17,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:17,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:17,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:17,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:17,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:18,288 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:18,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:18,295 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:12:18,637 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-30 20:12:18,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:18,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:18,691 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:18,691 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 20:12:18,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 20:12:18,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 20:12:18,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 20:12:18,692 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-09-30 20:12:19,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:19,024 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 20:12:19,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 20:12:19,024 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-30 20:12:19,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:19,025 INFO L225 Difference]: With dead ends: 99 [2018-09-30 20:12:19,025 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 20:12:19,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 20:12:19,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 20:12:19,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 20:12:19,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 20:12:19,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-30 20:12:19,030 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-09-30 20:12:19,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:19,031 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-30 20:12:19,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 20:12:19,031 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-30 20:12:19,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 20:12:19,031 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:19,031 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-09-30 20:12:19,031 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:19,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:19,032 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-09-30 20:12:19,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:19,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:19,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:19,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:19,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:19,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:20,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:20,863 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:20,863 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:20,871 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:12:20,919 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:12:20,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:20,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:20,965 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:20,965 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 20:12:20,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 20:12:20,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 20:12:20,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 20:12:20,966 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-09-30 20:12:21,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:21,074 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 20:12:21,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:12:21,075 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-30 20:12:21,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:21,075 INFO L225 Difference]: With dead ends: 101 [2018-09-30 20:12:21,075 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 20:12:21,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 20:12:21,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 20:12:21,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 20:12:21,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 20:12:21,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 20:12:21,080 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-09-30 20:12:21,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:21,080 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 20:12:21,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 20:12:21,080 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 20:12:21,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 20:12:21,081 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:21,081 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-09-30 20:12:21,081 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:21,081 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:21,081 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-09-30 20:12:21,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:21,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:21,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:21,082 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:21,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:22,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:22,061 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:22,068 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:12:22,964 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-30 20:12:22,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:22,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:23,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:23,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 20:12:23,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:12:23,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:12:23,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:12:23,027 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-09-30 20:12:23,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:23,185 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 20:12:23,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:12:23,186 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-30 20:12:23,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:23,187 INFO L225 Difference]: With dead ends: 103 [2018-09-30 20:12:23,187 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 20:12:23,187 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 [2018-09-30 20:12:23,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 20:12:23,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 20:12:23,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 20:12:23,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-30 20:12:23,190 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-09-30 20:12:23,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:23,190 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-30 20:12:23,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:12:23,191 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-30 20:12:23,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 20:12:23,191 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:23,191 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-09-30 20:12:23,191 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:23,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:23,192 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-09-30 20:12:23,192 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:23,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:23,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:23,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:23,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:24,306 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:24,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:24,313 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:12:24,624 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 20:12:24,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:24,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:24,663 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:24,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 20:12:24,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 20:12:24,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 20:12:24,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 20:12:24,665 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-09-30 20:12:24,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:24,789 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 20:12:24,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:12:24,789 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-30 20:12:24,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:24,791 INFO L225 Difference]: With dead ends: 105 [2018-09-30 20:12:24,791 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 20:12:24,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 20:12:24,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 20:12:24,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 20:12:24,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 20:12:24,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 20:12:24,795 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-09-30 20:12:24,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:24,795 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 20:12:24,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 20:12:24,795 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 20:12:24,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 20:12:24,796 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:24,796 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-09-30 20:12:24,796 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:24,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:24,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-09-30 20:12:24,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:24,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:24,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:24,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:24,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:26,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:26,726 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:26,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:26,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:12:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:26,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:26,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:26,855 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 20:12:26,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 20:12:26,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 20:12:26,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 20:12:26,856 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-09-30 20:12:26,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:26,995 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 20:12:26,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 20:12:26,996 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-30 20:12:26,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:26,997 INFO L225 Difference]: With dead ends: 107 [2018-09-30 20:12:26,997 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 20:12:26,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 20:12:26,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 20:12:27,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 20:12:27,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 20:12:27,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-30 20:12:27,002 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-09-30 20:12:27,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:27,003 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-30 20:12:27,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 20:12:27,003 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-30 20:12:27,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 20:12:27,004 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:27,004 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-09-30 20:12:27,004 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:27,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:27,005 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-09-30 20:12:27,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:27,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:27,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:27,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:12:27,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:28,466 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:28,466 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:28,474 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:12:28,524 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:12:28,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:28,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:28,568 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:28,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 20:12:28,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:12:28,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:12:28,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 20:12:28,570 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-09-30 20:12:28,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:28,740 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 20:12:28,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 20:12:28,741 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-30 20:12:28,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:28,743 INFO L225 Difference]: With dead ends: 109 [2018-09-30 20:12:28,743 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 20:12:28,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 20:12:28,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 20:12:28,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 20:12:28,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 20:12:28,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-30 20:12:28,747 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-09-30 20:12:28,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:28,747 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-30 20:12:28,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 20:12:28,748 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-30 20:12:28,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 20:12:28,748 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:28,748 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-09-30 20:12:28,749 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:28,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:28,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-09-30 20:12:28,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:28,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:28,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:28,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:28,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:29,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:29,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:29,900 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:12:30,336 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-30 20:12:30,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:30,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:30,380 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:30,380 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 20:12:30,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 20:12:30,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 20:12:30,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:12:30,382 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-09-30 20:12:30,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:30,509 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 20:12:30,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 20:12:30,510 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-30 20:12:30,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:30,511 INFO L225 Difference]: With dead ends: 111 [2018-09-30 20:12:30,511 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 20:12:30,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:12:30,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 20:12:30,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 20:12:30,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 20:12:30,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-30 20:12:30,515 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-09-30 20:12:30,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:30,515 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-30 20:12:30,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 20:12:30,515 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-30 20:12:30,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 20:12:30,516 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:30,516 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-09-30 20:12:30,516 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:30,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:30,516 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-09-30 20:12:30,516 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:30,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:30,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:30,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:30,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:32,079 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:32,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:32,094 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:12:32,165 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:12:32,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:32,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:32,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:32,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 20:12:32,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 20:12:32,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 20:12:32,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 20:12:32,226 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-09-30 20:12:33,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:33,147 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 20:12:33,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 20:12:33,148 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-30 20:12:33,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:33,149 INFO L225 Difference]: With dead ends: 113 [2018-09-30 20:12:33,149 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 20:12:33,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 20:12:33,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 20:12:33,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 20:12:33,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 20:12:33,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-30 20:12:33,155 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-09-30 20:12:33,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:33,155 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-30 20:12:33,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 20:12:33,155 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-30 20:12:33,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 20:12:33,156 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:33,156 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-09-30 20:12:33,156 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:33,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:33,157 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-09-30 20:12:33,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:33,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:33,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:33,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:33,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:34,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:34,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:34,383 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:12:35,814 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-30 20:12:35,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:35,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:35,860 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:35,861 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 20:12:35,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 20:12:35,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 20:12:35,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 20:12:35,862 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-09-30 20:12:35,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:35,947 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 20:12:35,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 20:12:35,947 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-30 20:12:35,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:35,948 INFO L225 Difference]: With dead ends: 115 [2018-09-30 20:12:35,948 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 20:12:35,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 20:12:35,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 20:12:35,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 20:12:35,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 20:12:35,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-30 20:12:35,952 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-09-30 20:12:35,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:35,952 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-30 20:12:35,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 20:12:35,953 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-30 20:12:35,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 20:12:35,953 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:35,953 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-09-30 20:12:35,953 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:35,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:35,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-09-30 20:12:35,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:35,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:35,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:35,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:35,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:37,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:37,307 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:37,307 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:37,315 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:12:37,751 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 20:12:37,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:37,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:37,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:37,807 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:37,807 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 20:12:37,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 20:12:37,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 20:12:37,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 20:12:37,810 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-09-30 20:12:38,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:38,024 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 20:12:38,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 20:12:38,024 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-30 20:12:38,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:38,025 INFO L225 Difference]: With dead ends: 117 [2018-09-30 20:12:38,025 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 20:12:38,026 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 [2018-09-30 20:12:38,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 20:12:38,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 20:12:38,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 20:12:38,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-30 20:12:38,029 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-09-30 20:12:38,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:38,029 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-30 20:12:38,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 20:12:38,030 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-30 20:12:38,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 20:12:38,030 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:38,030 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-09-30 20:12:38,030 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:38,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:38,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-09-30 20:12:38,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:38,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:38,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:38,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:38,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:38,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:39,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:39,326 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:39,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:39,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:12:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:39,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:39,465 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:39,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 20:12:39,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 20:12:39,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 20:12:39,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 20:12:39,466 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-09-30 20:12:40,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:40,127 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-30 20:12:40,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 20:12:40,128 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-30 20:12:40,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:40,129 INFO L225 Difference]: With dead ends: 119 [2018-09-30 20:12:40,129 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 20:12:40,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 20:12:40,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 20:12:40,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 20:12:40,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 20:12:40,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-30 20:12:40,132 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-09-30 20:12:40,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:40,132 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-30 20:12:40,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 20:12:40,133 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-30 20:12:40,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 20:12:40,133 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:40,133 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-09-30 20:12:40,134 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:40,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:40,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-09-30 20:12:40,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:40,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:40,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:40,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:12:40,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:40,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:41,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:41,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:41,714 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:12:41,776 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:12:41,776 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:41,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:41,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:41,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:41,834 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 20:12:41,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 20:12:41,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 20:12:41,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 20:12:41,835 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-09-30 20:12:42,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:42,135 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 20:12:42,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 20:12:42,136 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-30 20:12:42,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:42,137 INFO L225 Difference]: With dead ends: 121 [2018-09-30 20:12:42,137 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 20:12:42,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 20:12:42,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 20:12:42,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 20:12:42,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 20:12:42,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-30 20:12:42,140 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-09-30 20:12:42,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:42,141 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-30 20:12:42,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 20:12:42,141 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-30 20:12:42,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 20:12:42,141 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:42,141 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-09-30 20:12:42,142 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:42,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:42,142 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-09-30 20:12:42,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:42,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:42,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:42,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:42,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:43,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:43,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:43,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:43,494 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:12:44,115 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-30 20:12:44,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:44,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:44,182 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:44,182 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 20:12:44,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 20:12:44,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 20:12:44,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 20:12:44,183 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-09-30 20:12:44,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:44,455 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-30 20:12:44,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 20:12:44,455 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-30 20:12:44,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:44,456 INFO L225 Difference]: With dead ends: 123 [2018-09-30 20:12:44,456 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 20:12:44,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 20:12:44,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 20:12:44,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-30 20:12:44,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 20:12:44,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-30 20:12:44,460 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-09-30 20:12:44,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:44,460 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-30 20:12:44,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 20:12:44,460 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-30 20:12:44,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-30 20:12:44,461 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:44,461 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-09-30 20:12:44,461 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:44,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:44,462 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-09-30 20:12:44,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:44,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:44,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:44,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:44,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:45,891 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:45,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:45,901 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:12:45,963 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:12:45,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:45,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:46,008 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:46,008 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 20:12:46,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 20:12:46,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 20:12:46,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 20:12:46,009 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-09-30 20:12:46,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:46,134 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-30 20:12:46,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 20:12:46,134 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-09-30 20:12:46,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:46,135 INFO L225 Difference]: With dead ends: 125 [2018-09-30 20:12:46,135 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 20:12:46,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 20:12:46,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 20:12:46,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 20:12:46,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 20:12:46,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-30 20:12:46,139 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-09-30 20:12:46,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:46,139 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-30 20:12:46,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 20:12:46,140 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-30 20:12:46,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 20:12:46,140 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:46,140 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-09-30 20:12:46,141 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:46,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:46,141 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-09-30 20:12:46,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:46,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:46,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:46,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:46,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:47,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:47,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:47,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:47,839 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:12:49,893 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-30 20:12:49,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:49,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:49,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:49,958 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:49,958 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 20:12:49,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 20:12:49,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 20:12:49,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 20:12:49,960 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-09-30 20:12:50,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:50,131 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-30 20:12:50,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 20:12:50,131 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-09-30 20:12:50,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:50,132 INFO L225 Difference]: With dead ends: 127 [2018-09-30 20:12:50,132 INFO L226 Difference]: Without dead ends: 125 [2018-09-30 20:12:50,133 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 [2018-09-30 20:12:50,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-30 20:12:50,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-30 20:12:50,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 20:12:50,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-30 20:12:50,136 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-09-30 20:12:50,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:50,136 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-30 20:12:50,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 20:12:50,137 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-30 20:12:50,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-30 20:12:50,137 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:50,137 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-09-30 20:12:50,138 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:50,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:50,138 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-09-30 20:12:50,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:50,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:50,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:50,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:50,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:51,914 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:51,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:51,924 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:12:52,540 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 20:12:52,540 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:52,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:52,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:52,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:52,603 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 20:12:52,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 20:12:52,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 20:12:52,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 20:12:52,604 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-09-30 20:12:52,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:52,808 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-30 20:12:52,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 20:12:52,808 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-09-30 20:12:52,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:52,809 INFO L225 Difference]: With dead ends: 129 [2018-09-30 20:12:52,810 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 20:12:52,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 20:12:52,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 20:12:52,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-30 20:12:52,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 20:12:52,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-30 20:12:52,813 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-09-30 20:12:52,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:52,814 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-30 20:12:52,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 20:12:52,814 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-30 20:12:52,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-30 20:12:52,815 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:52,815 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-09-30 20:12:52,815 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:52,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:52,815 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-09-30 20:12:52,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:52,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:52,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:52,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:52,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:52,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:54,380 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:54,380 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:54,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:12:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:54,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:54,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:54,510 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 20:12:54,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 20:12:54,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 20:12:54,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 20:12:54,511 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-09-30 20:12:55,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:55,697 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-30 20:12:55,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 20:12:55,697 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-09-30 20:12:55,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:55,698 INFO L225 Difference]: With dead ends: 131 [2018-09-30 20:12:55,698 INFO L226 Difference]: Without dead ends: 129 [2018-09-30 20:12:55,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 20:12:55,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-30 20:12:55,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-30 20:12:55,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 20:12:55,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-30 20:12:55,701 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-09-30 20:12:55,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:55,701 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-30 20:12:55,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 20:12:55,701 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-30 20:12:55,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 20:12:55,702 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:55,702 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-09-30 20:12:55,702 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:55,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:55,702 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-09-30 20:12:55,702 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:55,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:55,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:55,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:12:55,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:57,555 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:57,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:57,564 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:12:57,631 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:12:57,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:57,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:57,675 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:57,675 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 20:12:57,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 20:12:57,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 20:12:57,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 20:12:57,676 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-09-30 20:12:57,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:57,791 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-30 20:12:57,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 20:12:57,792 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-09-30 20:12:57,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:57,792 INFO L225 Difference]: With dead ends: 133 [2018-09-30 20:12:57,793 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 20:12:57,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 20:12:57,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 20:12:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 20:12:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 20:12:57,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-30 20:12:57,796 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-09-30 20:12:57,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:57,796 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-30 20:12:57,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 20:12:57,797 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-30 20:12:57,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 20:12:57,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:57,797 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-09-30 20:12:57,798 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:57,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:57,798 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-09-30 20:12:57,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:57,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:57,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:57,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:57,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:59,362 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:59,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:59,372 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:13:00,219 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-30 20:13:00,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:00,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:00,265 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:00,265 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 20:13:00,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 20:13:00,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 20:13:00,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 20:13:00,267 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-09-30 20:13:00,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:00,414 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-30 20:13:00,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 20:13:00,415 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-09-30 20:13:00,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:00,415 INFO L225 Difference]: With dead ends: 135 [2018-09-30 20:13:00,415 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 20:13:00,416 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 [2018-09-30 20:13:00,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 20:13:00,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 20:13:00,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 20:13:00,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-30 20:13:00,419 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-09-30 20:13:00,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:00,419 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-30 20:13:00,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 20:13:00,419 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-30 20:13:00,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 20:13:00,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:00,420 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-09-30 20:13:00,420 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:00,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:00,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-09-30 20:13:00,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:00,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:00,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:00,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:00,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:00,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:02,494 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:02,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:02,504 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:13:02,585 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:13:02,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:02,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:02,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:02,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 20:13:02,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 20:13:02,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 20:13:02,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 20:13:02,663 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-09-30 20:13:03,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:03,066 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-30 20:13:03,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 20:13:03,067 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-09-30 20:13:03,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:03,068 INFO L225 Difference]: With dead ends: 137 [2018-09-30 20:13:03,068 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 20:13:03,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 20:13:03,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 20:13:03,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-30 20:13:03,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-30 20:13:03,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-30 20:13:03,073 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-09-30 20:13:03,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:03,073 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-30 20:13:03,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 20:13:03,073 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-30 20:13:03,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 20:13:03,074 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:03,074 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-09-30 20:13:03,074 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:03,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:03,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-09-30 20:13:03,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:03,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:03,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:03,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:03,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:04,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:04,764 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:04,764 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:04,790 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:13:07,915 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-30 20:13:07,915 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:07,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:07,988 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:07,988 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 20:13:07,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 20:13:07,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 20:13:07,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 20:13:07,990 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-09-30 20:13:08,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:08,273 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-30 20:13:08,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 20:13:08,274 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-09-30 20:13:08,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:08,275 INFO L225 Difference]: With dead ends: 139 [2018-09-30 20:13:08,275 INFO L226 Difference]: Without dead ends: 137 [2018-09-30 20:13:08,276 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 [2018-09-30 20:13:08,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-30 20:13:08,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-30 20:13:08,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 20:13:08,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-30 20:13:08,280 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-09-30 20:13:08,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:08,280 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-30 20:13:08,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 20:13:08,281 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-30 20:13:08,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-30 20:13:08,281 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:08,281 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-09-30 20:13:08,282 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:08,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:08,282 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-09-30 20:13:08,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:08,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:08,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:08,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:08,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:09,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:09,976 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:09,984 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:13:10,800 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 20:13:10,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:10,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:10,871 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:10,871 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 20:13:10,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 20:13:10,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 20:13:10,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 20:13:10,873 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-09-30 20:13:11,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:11,004 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-30 20:13:11,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 20:13:11,004 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-09-30 20:13:11,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:11,005 INFO L225 Difference]: With dead ends: 141 [2018-09-30 20:13:11,006 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 20:13:11,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 20:13:11,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 20:13:11,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 20:13:11,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 20:13:11,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-30 20:13:11,011 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-09-30 20:13:11,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:11,011 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-30 20:13:11,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 20:13:11,011 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-30 20:13:11,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 20:13:11,012 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:11,012 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-09-30 20:13:11,012 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:11,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:11,012 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-09-30 20:13:11,012 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:11,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:11,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:11,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:11,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:13,128 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:13,128 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:13,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:13:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:13,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:13,269 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:13,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 20:13:13,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 20:13:13,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 20:13:13,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 20:13:13,271 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-09-30 20:13:13,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:13,431 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-30 20:13:13,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 20:13:13,432 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-09-30 20:13:13,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:13,433 INFO L225 Difference]: With dead ends: 143 [2018-09-30 20:13:13,433 INFO L226 Difference]: Without dead ends: 141 [2018-09-30 20:13:13,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 20:13:13,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-30 20:13:13,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-30 20:13:13,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-30 20:13:13,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-30 20:13:13,438 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-09-30 20:13:13,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:13,438 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-30 20:13:13,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 20:13:13,438 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-30 20:13:13,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 20:13:13,439 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:13,439 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-09-30 20:13:13,439 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:13,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:13,440 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-09-30 20:13:13,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:13,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:13,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:13,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:13:13,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:13,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:15,244 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:15,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:15,252 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:13:15,336 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:13:15,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:15,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:15,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:15,402 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:15,403 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 20:13:15,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 20:13:15,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 20:13:15,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 20:13:15,404 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-09-30 20:13:15,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:15,548 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-30 20:13:15,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 20:13:15,549 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-09-30 20:13:15,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:15,550 INFO L225 Difference]: With dead ends: 145 [2018-09-30 20:13:15,550 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 20:13:15,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 20:13:15,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 20:13:15,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-30 20:13:15,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 20:13:15,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-30 20:13:15,555 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-09-30 20:13:15,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:15,555 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-30 20:13:15,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 20:13:15,555 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-30 20:13:15,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 20:13:15,556 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:15,556 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-09-30 20:13:15,556 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:15,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:15,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-09-30 20:13:15,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:15,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:15,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:15,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:15,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:17,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:17,644 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:17,644 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:17,652 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:13:18,846 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-30 20:13:18,846 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:18,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:18,915 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:18,915 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 20:13:18,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 20:13:18,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 20:13:18,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 20:13:18,917 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-09-30 20:13:19,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:19,271 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-30 20:13:19,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 20:13:19,272 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-09-30 20:13:19,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:19,273 INFO L225 Difference]: With dead ends: 147 [2018-09-30 20:13:19,273 INFO L226 Difference]: Without dead ends: 145 [2018-09-30 20:13:19,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 20:13:19,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-30 20:13:19,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-30 20:13:19,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 20:13:19,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-30 20:13:19,276 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-09-30 20:13:19,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:19,276 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-30 20:13:19,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 20:13:19,277 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-30 20:13:19,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-30 20:13:19,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:19,277 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-09-30 20:13:19,277 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:19,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:19,278 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-09-30 20:13:19,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:19,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:19,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:19,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:19,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:21,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:21,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:21,236 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:13:21,309 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:13:21,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:21,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:21,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:21,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 20:13:21,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 20:13:21,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 20:13:21,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 20:13:21,379 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-09-30 20:13:21,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:21,593 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-30 20:13:21,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 20:13:21,593 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-09-30 20:13:21,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:21,594 INFO L225 Difference]: With dead ends: 149 [2018-09-30 20:13:21,594 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 20:13:21,595 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 [2018-09-30 20:13:21,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 20:13:21,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-30 20:13:21,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 20:13:21,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-30 20:13:21,598 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-09-30 20:13:21,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:21,598 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-30 20:13:21,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 20:13:21,598 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-30 20:13:21,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 20:13:21,599 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:21,599 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-09-30 20:13:21,599 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:21,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:21,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-09-30 20:13:21,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:21,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:21,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:21,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:21,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:23,835 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:23,836 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:23,844 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:13:27,959 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-30 20:13:27,960 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:27,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:28,022 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:28,022 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 20:13:28,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 20:13:28,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 20:13:28,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 20:13:28,023 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-09-30 20:13:28,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:28,180 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-30 20:13:28,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 20:13:28,180 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-09-30 20:13:28,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:28,181 INFO L225 Difference]: With dead ends: 151 [2018-09-30 20:13:28,181 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 20:13:28,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 20:13:28,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 20:13:28,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-30 20:13:28,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 20:13:28,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-30 20:13:28,186 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-09-30 20:13:28,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:28,186 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-30 20:13:28,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 20:13:28,186 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-30 20:13:28,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-30 20:13:28,187 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:28,187 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-09-30 20:13:28,187 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:28,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:28,188 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-09-30 20:13:28,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:28,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:28,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:28,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:28,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:30,306 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:30,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:30,314 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:13:31,407 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-30 20:13:31,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:31,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:31,455 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:31,455 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 20:13:31,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 20:13:31,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 20:13:31,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 20:13:31,457 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-09-30 20:13:31,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:31,596 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-30 20:13:31,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 20:13:31,596 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-09-30 20:13:31,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:31,598 INFO L225 Difference]: With dead ends: 153 [2018-09-30 20:13:31,598 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 20:13:31,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 20:13:31,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 20:13:31,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-30 20:13:31,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 20:13:31,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-30 20:13:31,603 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-09-30 20:13:31,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:31,604 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-30 20:13:31,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 20:13:31,604 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-30 20:13:31,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-30 20:13:31,604 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:31,605 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-09-30 20:13:31,605 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:31,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:31,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-09-30 20:13:31,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:31,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:31,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:31,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:31,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:33,960 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:33,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:33,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:13:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:34,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:34,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:34,102 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:34,102 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 20:13:34,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 20:13:34,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 20:13:34,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 20:13:34,103 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-09-30 20:13:34,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:34,304 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-30 20:13:34,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 20:13:34,305 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-09-30 20:13:34,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:34,305 INFO L225 Difference]: With dead ends: 155 [2018-09-30 20:13:34,305 INFO L226 Difference]: Without dead ends: 153 [2018-09-30 20:13:34,306 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 [2018-09-30 20:13:34,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-30 20:13:34,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-30 20:13:34,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-30 20:13:34,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-09-30 20:13:34,308 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-09-30 20:13:34,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:34,309 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-09-30 20:13:34,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 20:13:34,309 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-09-30 20:13:34,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 20:13:34,309 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:34,309 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-09-30 20:13:34,310 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:34,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:34,310 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-09-30 20:13:34,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:34,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:34,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:34,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:13:34,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:36,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:36,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:36,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:36,511 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:13:36,588 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:13:36,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:36,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:36,657 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:36,657 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 20:13:36,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 20:13:36,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 20:13:36,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 20:13:36,659 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-09-30 20:13:36,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:36,908 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-30 20:13:36,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 20:13:36,908 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-09-30 20:13:36,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:36,909 INFO L225 Difference]: With dead ends: 157 [2018-09-30 20:13:36,909 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 20:13:36,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 20:13:36,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 20:13:36,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-30 20:13:36,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 20:13:36,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-30 20:13:36,912 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-09-30 20:13:36,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:36,912 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-30 20:13:36,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 20:13:36,912 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-30 20:13:36,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-30 20:13:36,913 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:36,913 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-09-30 20:13:36,913 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:36,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:36,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-09-30 20:13:36,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:36,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:36,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:36,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:36,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:39,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:39,352 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:39,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:39,359 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:13:40,995 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-30 20:13:40,996 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:41,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:41,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:41,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 20:13:41,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 20:13:41,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 20:13:41,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 20:13:41,063 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-09-30 20:13:41,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:41,274 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-30 20:13:41,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 20:13:41,274 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-09-30 20:13:41,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:41,275 INFO L225 Difference]: With dead ends: 159 [2018-09-30 20:13:41,275 INFO L226 Difference]: Without dead ends: 157 [2018-09-30 20:13:41,275 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 [2018-09-30 20:13:41,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-30 20:13:41,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-30 20:13:41,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-30 20:13:41,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-09-30 20:13:41,278 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-09-30 20:13:41,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:41,278 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-09-30 20:13:41,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 20:13:41,279 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-09-30 20:13:41,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-30 20:13:41,279 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:41,279 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-09-30 20:13:41,279 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:41,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:41,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-09-30 20:13:41,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:41,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:41,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:41,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:41,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:43,793 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:43,793 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:43,801 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:13:43,880 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:13:43,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:43,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:43,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:43,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 20:13:43,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 20:13:43,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 20:13:43,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 20:13:43,937 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-09-30 20:13:44,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:44,152 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-30 20:13:44,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 20:13:44,153 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-09-30 20:13:44,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:44,154 INFO L225 Difference]: With dead ends: 161 [2018-09-30 20:13:44,154 INFO L226 Difference]: Without dead ends: 159 [2018-09-30 20:13:44,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 20:13:44,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-30 20:13:44,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-30 20:13:44,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-30 20:13:44,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-09-30 20:13:44,157 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-09-30 20:13:44,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:44,157 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-09-30 20:13:44,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 20:13:44,158 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-09-30 20:13:44,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-30 20:13:44,158 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:44,158 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-09-30 20:13:44,158 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:44,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:44,159 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-09-30 20:13:44,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:44,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:44,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:44,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:44,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:46,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:46,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:46,406 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:13:52,144 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-30 20:13:52,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:52,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:52,201 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:52,201 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 20:13:52,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 20:13:52,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 20:13:52,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 20:13:52,203 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-09-30 20:13:52,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:52,743 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-30 20:13:52,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 20:13:52,744 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-09-30 20:13:52,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:52,745 INFO L225 Difference]: With dead ends: 163 [2018-09-30 20:13:52,745 INFO L226 Difference]: Without dead ends: 161 [2018-09-30 20:13:52,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 20:13:52,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-30 20:13:52,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-30 20:13:52,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-30 20:13:52,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-09-30 20:13:52,749 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-09-30 20:13:52,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:52,750 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-09-30 20:13:52,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 20:13:52,750 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-09-30 20:13:52,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-30 20:13:52,751 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:52,751 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-09-30 20:13:52,751 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:52,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:52,751 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-09-30 20:13:52,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:52,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:52,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:52,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:52,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:55,345 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:55,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:55,353 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:13:56,770 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-30 20:13:56,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:56,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:56,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:56,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-30 20:13:56,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 20:13:56,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 20:13:56,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 20:13:56,826 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-09-30 20:13:56,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:56,983 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-30 20:13:56,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 20:13:56,984 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-09-30 20:13:56,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:56,985 INFO L225 Difference]: With dead ends: 165 [2018-09-30 20:13:56,985 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 20:13:56,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 20:13:56,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 20:13:56,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-30 20:13:56,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 20:13:56,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-09-30 20:13:56,989 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-09-30 20:13:56,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:56,989 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-09-30 20:13:56,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 20:13:56,989 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-09-30 20:13:56,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-30 20:13:56,990 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:56,990 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-09-30 20:13:56,990 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:56,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:56,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-09-30 20:13:56,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:56,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:56,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:56,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:56,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:59,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:59,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:59,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:13:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:59,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:59,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:59,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:59,866 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 20:13:59,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 20:13:59,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 20:13:59,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 20:13:59,867 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-09-30 20:14:00,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:00,097 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-30 20:14:00,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 20:14:00,097 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-09-30 20:14:00,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:00,098 INFO L225 Difference]: With dead ends: 167 [2018-09-30 20:14:00,098 INFO L226 Difference]: Without dead ends: 165 [2018-09-30 20:14:00,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 20:14:00,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-30 20:14:00,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-30 20:14:00,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-30 20:14:00,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-09-30 20:14:00,102 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-09-30 20:14:00,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:00,102 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-09-30 20:14:00,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 20:14:00,102 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-09-30 20:14:00,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-30 20:14:00,103 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:00,103 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-09-30 20:14:00,103 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:00,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:00,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-09-30 20:14:00,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:00,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:00,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:00,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:00,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:02,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:02,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:02,513 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:14:02,606 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:14:02,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:02,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:02,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:02,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:02,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 20:14:02,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 20:14:02,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 20:14:02,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 20:14:02,670 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-09-30 20:14:02,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:02,830 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-30 20:14:02,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 20:14:02,830 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-09-30 20:14:02,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:02,831 INFO L225 Difference]: With dead ends: 169 [2018-09-30 20:14:02,831 INFO L226 Difference]: Without dead ends: 167 [2018-09-30 20:14:02,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 20:14:02,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-30 20:14:02,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-30 20:14:02,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 20:14:02,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-09-30 20:14:02,834 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-09-30 20:14:02,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:02,835 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-09-30 20:14:02,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 20:14:02,835 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-09-30 20:14:02,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-30 20:14:02,835 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:02,835 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-09-30 20:14:02,836 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:02,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:02,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-09-30 20:14:02,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:02,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:02,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:02,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:02,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:05,662 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:05,662 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:05,669 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:14:07,766 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-30 20:14:07,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:07,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:07,822 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:07,823 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 20:14:07,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 20:14:07,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 20:14:07,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 20:14:07,824 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-09-30 20:14:08,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:08,000 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-09-30 20:14:08,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 20:14:08,000 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-09-30 20:14:08,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:08,002 INFO L225 Difference]: With dead ends: 171 [2018-09-30 20:14:08,002 INFO L226 Difference]: Without dead ends: 169 [2018-09-30 20:14:08,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 20:14:08,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-30 20:14:08,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-30 20:14:08,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-30 20:14:08,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-09-30 20:14:08,006 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-09-30 20:14:08,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:08,006 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-09-30 20:14:08,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 20:14:08,006 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-09-30 20:14:08,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-30 20:14:08,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:08,007 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-09-30 20:14:08,007 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:08,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:08,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-09-30 20:14:08,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:08,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:08,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:08,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:08,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:10,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:10,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:10,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:10,716 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:14:10,802 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:14:10,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:10,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:10,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:10,872 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:10,872 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 20:14:10,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 20:14:10,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 20:14:10,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 20:14:10,874 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-09-30 20:14:11,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:11,169 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-09-30 20:14:11,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 20:14:11,169 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-09-30 20:14:11,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:11,170 INFO L225 Difference]: With dead ends: 173 [2018-09-30 20:14:11,170 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 20:14:11,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 20:14:11,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 20:14:11,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-30 20:14:11,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-30 20:14:11,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-09-30 20:14:11,174 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-09-30 20:14:11,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:11,174 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-09-30 20:14:11,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 20:14:11,174 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-09-30 20:14:11,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 20:14:11,175 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:11,175 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-09-30 20:14:11,175 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:11,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:11,175 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-09-30 20:14:11,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:11,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:11,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:11,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:11,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:14,027 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:14,027 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:14,037 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:14:22,108 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-30 20:14:22,108 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:22,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:22,171 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:22,171 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 20:14:22,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 20:14:22,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 20:14:22,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 20:14:22,173 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-09-30 20:14:22,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:22,444 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-09-30 20:14:22,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 20:14:22,445 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-09-30 20:14:22,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:22,446 INFO L225 Difference]: With dead ends: 175 [2018-09-30 20:14:22,446 INFO L226 Difference]: Without dead ends: 173 [2018-09-30 20:14:22,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 20:14:22,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-30 20:14:22,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-30 20:14:22,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-30 20:14:22,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-09-30 20:14:22,451 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-09-30 20:14:22,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:22,451 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-09-30 20:14:22,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 20:14:22,451 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-09-30 20:14:22,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-30 20:14:22,452 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:22,452 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-09-30 20:14:22,452 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:22,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:22,453 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-09-30 20:14:22,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:22,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:22,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:22,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:22,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:25,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:25,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:25,537 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:25,544 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:14:27,443 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-30 20:14:27,443 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:27,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:27,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:27,502 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:27,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-30 20:14:27,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 20:14:27,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 20:14:27,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 20:14:27,504 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-09-30 20:14:27,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:27,953 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-09-30 20:14:27,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 20:14:27,953 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-09-30 20:14:27,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:27,954 INFO L225 Difference]: With dead ends: 177 [2018-09-30 20:14:27,954 INFO L226 Difference]: Without dead ends: 175 [2018-09-30 20:14:27,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 20:14:27,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-30 20:14:27,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-30 20:14:27,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-30 20:14:27,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-09-30 20:14:27,957 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-09-30 20:14:27,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:27,958 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-09-30 20:14:27,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 20:14:27,958 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-09-30 20:14:27,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-30 20:14:27,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:27,959 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-09-30 20:14:27,959 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:27,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:27,961 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-09-30 20:14:27,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:27,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:27,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:27,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:27,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:27,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:31,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:31,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:31,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:31,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:31,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:31,289 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:31,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 20:14:31,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 20:14:31,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 20:14:31,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 20:14:31,291 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-09-30 20:14:31,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:31,561 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-09-30 20:14:31,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 20:14:31,562 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-09-30 20:14:31,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:31,563 INFO L225 Difference]: With dead ends: 179 [2018-09-30 20:14:31,563 INFO L226 Difference]: Without dead ends: 177 [2018-09-30 20:14:31,563 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 20:14:31,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-30 20:14:31,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-30 20:14:31,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-30 20:14:31,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-09-30 20:14:31,567 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-09-30 20:14:31,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:31,567 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-09-30 20:14:31,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 20:14:31,567 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-09-30 20:14:31,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-30 20:14:31,568 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:31,568 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-09-30 20:14:31,569 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:31,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:31,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-09-30 20:14:31,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:31,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:31,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:31,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:31,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:34,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:34,570 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:34,570 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:34,578 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:14:34,667 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:14:34,668 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:34,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:34,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:34,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-30 20:14:34,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 20:14:34,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 20:14:34,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 20:14:34,729 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-09-30 20:14:34,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:34,896 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-09-30 20:14:34,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 20:14:34,896 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-09-30 20:14:34,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:34,897 INFO L225 Difference]: With dead ends: 181 [2018-09-30 20:14:34,897 INFO L226 Difference]: Without dead ends: 179 [2018-09-30 20:14:34,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 20:14:34,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-30 20:14:34,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-30 20:14:34,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-30 20:14:34,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-09-30 20:14:34,901 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-09-30 20:14:34,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:34,901 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-09-30 20:14:34,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 20:14:34,901 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-09-30 20:14:34,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-30 20:14:34,902 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:34,902 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-09-30 20:14:34,902 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:34,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:34,902 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-09-30 20:14:34,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:34,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:34,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:34,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:34,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:37,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:37,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:37,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:37,702 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:14:40,470 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-30 20:14:40,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:40,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:40,530 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:40,531 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 20:14:40,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 20:14:40,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 20:14:40,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 20:14:40,532 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-09-30 20:14:40,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:40,814 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-09-30 20:14:40,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 20:14:40,814 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-09-30 20:14:40,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:40,815 INFO L225 Difference]: With dead ends: 183 [2018-09-30 20:14:40,815 INFO L226 Difference]: Without dead ends: 181 [2018-09-30 20:14:40,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 20:14:40,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-30 20:14:40,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-30 20:14:40,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 20:14:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-09-30 20:14:40,819 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-09-30 20:14:40,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:40,819 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-09-30 20:14:40,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 20:14:40,819 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-09-30 20:14:40,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-30 20:14:40,820 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:40,820 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-09-30 20:14:40,820 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:40,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:40,820 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-09-30 20:14:40,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:40,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:40,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:40,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:40,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:43,785 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:43,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:43,793 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:14:43,884 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:14:43,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:43,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:43,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:43,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-30 20:14:43,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 20:14:43,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 20:14:43,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 20:14:43,953 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-09-30 20:14:44,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:44,181 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-09-30 20:14:44,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 20:14:44,181 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-09-30 20:14:44,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:44,182 INFO L225 Difference]: With dead ends: 185 [2018-09-30 20:14:44,182 INFO L226 Difference]: Without dead ends: 183 [2018-09-30 20:14:44,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 20:14:44,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-30 20:14:44,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-30 20:14:44,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-30 20:14:44,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-09-30 20:14:44,185 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-09-30 20:14:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:44,186 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-09-30 20:14:44,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 20:14:44,186 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-09-30 20:14:44,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-30 20:14:44,186 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:44,187 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-09-30 20:14:44,187 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:44,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:44,187 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-09-30 20:14:44,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:44,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:44,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:44,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:44,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:44,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:47,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:47,168 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:47,177 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:14:57,721 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-09-30 20:14:57,721 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:57,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:57,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:57,788 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:57,788 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 20:14:57,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 20:14:57,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 20:14:57,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 20:14:57,789 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-09-30 20:14:58,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:58,092 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-09-30 20:14:58,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 20:14:58,092 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-09-30 20:14:58,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:58,093 INFO L225 Difference]: With dead ends: 187 [2018-09-30 20:14:58,093 INFO L226 Difference]: Without dead ends: 185 [2018-09-30 20:14:58,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 20:14:58,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-30 20:14:58,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-30 20:14:58,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-30 20:14:58,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-09-30 20:14:58,096 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-09-30 20:14:58,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:58,097 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-09-30 20:14:58,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 20:14:58,097 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-09-30 20:14:58,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-30 20:14:58,098 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:58,098 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-09-30 20:14:58,098 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:58,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:58,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-09-30 20:14:58,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:58,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:58,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:58,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:58,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:01,445 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:01,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:01,454 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:15:04,046 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-09-30 20:15:04,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:04,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:04,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:04,111 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:04,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-30 20:15:04,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 20:15:04,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 20:15:04,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 20:15:04,113 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-09-30 20:15:04,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:04,353 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-09-30 20:15:04,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 20:15:04,353 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-09-30 20:15:04,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:04,354 INFO L225 Difference]: With dead ends: 189 [2018-09-30 20:15:04,354 INFO L226 Difference]: Without dead ends: 187 [2018-09-30 20:15:04,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 20:15:04,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-30 20:15:04,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-30 20:15:04,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-30 20:15:04,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-09-30 20:15:04,359 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-09-30 20:15:04,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:04,359 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-09-30 20:15:04,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 20:15:04,360 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-09-30 20:15:04,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-30 20:15:04,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:04,361 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-09-30 20:15:04,361 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:04,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:04,361 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-09-30 20:15:04,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:04,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:04,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:04,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:04,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:04,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:07,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:07,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:07,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:15:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:07,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:07,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:07,810 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:07,810 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 20:15:07,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 20:15:07,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 20:15:07,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 20:15:07,812 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-09-30 20:15:08,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:08,013 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-09-30 20:15:08,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 20:15:08,013 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-09-30 20:15:08,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:08,014 INFO L225 Difference]: With dead ends: 191 [2018-09-30 20:15:08,014 INFO L226 Difference]: Without dead ends: 189 [2018-09-30 20:15:08,015 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 [2018-09-30 20:15:08,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-30 20:15:08,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-30 20:15:08,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-30 20:15:08,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-09-30 20:15:08,019 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-09-30 20:15:08,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:08,020 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-09-30 20:15:08,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 20:15:08,020 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-09-30 20:15:08,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 20:15:08,021 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:08,021 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-09-30 20:15:08,021 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:08,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:08,021 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-09-30 20:15:08,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:08,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:08,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:08,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:15:08,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:11,465 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:11,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:11,472 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:15:11,567 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:15:11,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:11,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:11,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:11,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-30 20:15:11,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 20:15:11,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 20:15:11,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 20:15:11,628 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-09-30 20:15:11,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:11,800 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-09-30 20:15:11,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 20:15:11,800 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-09-30 20:15:11,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:11,801 INFO L225 Difference]: With dead ends: 193 [2018-09-30 20:15:11,802 INFO L226 Difference]: Without dead ends: 191 [2018-09-30 20:15:11,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 20:15:11,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-30 20:15:11,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-30 20:15:11,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-30 20:15:11,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-09-30 20:15:11,806 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-09-30 20:15:11,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:11,806 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-09-30 20:15:11,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 20:15:11,806 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-09-30 20:15:11,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-30 20:15:11,807 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:11,807 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-09-30 20:15:11,808 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:11,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:11,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-09-30 20:15:11,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:11,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:11,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:11,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:11,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:15,987 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:15,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:15,994 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:15:19,765 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-09-30 20:15:19,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:19,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:19,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:19,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:19,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 20:15:19,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 20:15:19,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 20:15:19,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 20:15:19,836 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-09-30 20:15:20,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:20,070 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-09-30 20:15:20,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 20:15:20,070 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-09-30 20:15:20,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:20,071 INFO L225 Difference]: With dead ends: 195 [2018-09-30 20:15:20,071 INFO L226 Difference]: Without dead ends: 193 [2018-09-30 20:15:20,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 20:15:20,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-30 20:15:20,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-30 20:15:20,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-30 20:15:20,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-09-30 20:15:20,076 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-09-30 20:15:20,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:20,076 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-09-30 20:15:20,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 20:15:20,076 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-09-30 20:15:20,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-30 20:15:20,076 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:20,077 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-09-30 20:15:20,077 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:20,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:20,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-09-30 20:15:20,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:20,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:20,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:20,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:20,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:23,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:23,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:23,346 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:15:23,445 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:15:23,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:23,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:23,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:23,522 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:23,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-30 20:15:23,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 20:15:23,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 20:15:23,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 20:15:23,524 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-09-30 20:15:23,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:23,828 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-09-30 20:15:23,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 20:15:23,829 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-09-30 20:15:23,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:23,830 INFO L225 Difference]: With dead ends: 197 [2018-09-30 20:15:23,830 INFO L226 Difference]: Without dead ends: 195 [2018-09-30 20:15:23,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 20:15:23,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-30 20:15:23,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-30 20:15:23,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-30 20:15:23,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-09-30 20:15:23,834 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-09-30 20:15:23,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:23,834 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-09-30 20:15:23,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 20:15:23,834 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-09-30 20:15:23,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-30 20:15:23,835 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:23,835 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-09-30 20:15:23,835 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:23,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:23,835 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-09-30 20:15:23,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:23,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:23,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:23,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:23,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:27,476 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:27,476 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:27,485 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... [2018-09-30 20:15:40,709 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-09-30 20:15:40,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:40,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:40,720 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-30 20:15:40,920 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:40,921 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:15:40,925 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:15:40,926 INFO L202 PluginConnector]: Adding new model array2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:15:40 BoogieIcfgContainer [2018-09-30 20:15:40,926 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:15:40,927 INFO L168 Benchmark]: Toolchain (without parser) took 244011.44 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 34.1 MB). Free memory was 1.5 GB in the beginning and 988.6 MB in the end (delta: 468.6 MB). Peak memory consumption was 502.7 MB. Max. memory is 7.1 GB. [2018-09-30 20:15:40,928 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:15:40,928 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.64 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:15:40,928 INFO L168 Benchmark]: Boogie Preprocessor took 20.28 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:15:40,929 INFO L168 Benchmark]: RCFGBuilder took 273.57 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:15:40,929 INFO L168 Benchmark]: TraceAbstraction took 243664.90 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 34.1 MB). Free memory was 1.4 GB in the beginning and 988.6 MB in the end (delta: 447.5 MB). Peak memory consumption was 481.6 MB. Max. memory is 7.1 GB. [2018-09-30 20:15:40,931 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 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.64 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.28 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 273.57 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 243664.90 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 34.1 MB). Free memory was 1.4 GB in the beginning and 988.6 MB in the end (delta: 447.5 MB). Peak memory consumption was 481.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 42]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 42). Cancelled while BasicCegarLoop was analyzing trace of length 195 with TraceHistMax 96, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 243.5s OverallTime, 96 OverallIterations, 96 TraceHistogramMax, 18.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 380 SDtfs, 0 SDslu, 7618 SDs, 0 SdLazy, 7713 SolverSat, 153 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13867 GetRequests, 9307 SyntacticMatches, 0 SemanticMatches, 4560 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 131.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=195occurred in iteration=95, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 95 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 64.7s SatisfiabilityAnalysisTime, 136.8s InterpolantComputationTime, 18616 NumberOfCodeBlocks, 18616 NumberOfCodeBlocksAsserted, 2414 NumberOfCheckSat, 18427 ConstructedInterpolants, 0 QuantifiedInterpolants, 7040809 SizeOfPredicates, 94 NumberOfNonLiveVariables, 32477 ConjunctsInSsa, 4653 ConjunctsInUnsatCore, 189 InterpolantComputations, 1 PerfectInterpolantSequences, 0/571520 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/array2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_20-15-40-941.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/array2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_20-15-40-941.csv Completed graceful shutdown