java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_2.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:20:06,799 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:20:06,803 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:20:06,821 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:20:06,821 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:20:06,822 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:20:06,824 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:20:06,827 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:20:06,830 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:20:06,831 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:20:06,833 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 21:20:06,884 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 [2018-09-26 21:20:06,914 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:20:06,914 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:20:06,915 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:20:06,916 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:20:06,916 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:20:06,916 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:20:06,917 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:20:06,917 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:20:06,917 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:20:06,920 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:20:06,920 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:20:06,920 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:20:06,921 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:20:06,921 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:20:06,921 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:20:06,921 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:20:06,922 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:20:06,922 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:20:06,922 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:20:06,922 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:20:06,922 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:20:06,923 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:20:06,923 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:20:06,923 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:20:06,925 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:20:06,925 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:20:06,925 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:20:06,926 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:20:06,926 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:20:06,926 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:20:06,991 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:20:07,006 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:20:07,011 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:20:07,013 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:20:07,014 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:20:07,015 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_2.i_3.bpl [2018-09-26 21:20:07,016 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_2.i_3.bpl' [2018-09-26 21:20:07,075 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:20:07,079 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:20:07,079 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:20:07,080 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:20:07,080 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:20:07,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:07" (1/1) ... [2018-09-26 21:20:07,115 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:07" (1/1) ... [2018-09-26 21:20:07,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:20:07,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:20:07,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:20:07,124 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:20:07,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:07" (1/1) ... [2018-09-26 21:20:07,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:07" (1/1) ... [2018-09-26 21:20:07,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:07" (1/1) ... [2018-09-26 21:20:07,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:07" (1/1) ... [2018-09-26 21:20:07,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:07" (1/1) ... [2018-09-26 21:20:07,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:07" (1/1) ... [2018-09-26 21:20:07,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:07" (1/1) ... [2018-09-26 21:20:07,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:20:07,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:20:07,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:20:07,150 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:20:07,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:07" (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 [2018-09-26 21:20:07,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 21:20:07,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 21:20:07,422 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 21:20:07,423 INFO L202 PluginConnector]: Adding new model count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:20:07 BoogieIcfgContainer [2018-09-26 21:20:07,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:20:07,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:20:07,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:20:07,428 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:20:07,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:07" (1/2) ... [2018-09-26 21:20:07,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da55c77 and model type count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:20:07, skipping insertion in model container [2018-09-26 21:20:07,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:20:07" (2/2) ... [2018-09-26 21:20:07,431 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_2.i_3.bpl [2018-09-26 21:20:07,441 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:20:07,449 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:20:07,500 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:20:07,501 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:20:07,501 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:20:07,501 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:20:07,501 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:20:07,502 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:20:07,502 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:20:07,502 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:20:07,502 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:20:07,518 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-26 21:20:07,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 21:20:07,525 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:07,526 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-26 21:20:07,527 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:07,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:07,534 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-26 21:20:07,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:07,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:07,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:07,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:07,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:07,712 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:20:07,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 21:20:07,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:20:07,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:20:07,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:20:07,735 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-26 21:20:07,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:07,790 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-26 21:20:07,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:20:07,793 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-26 21:20:07,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:07,807 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:20:07,807 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 21:20:07,815 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 [2018-09-26 21:20:07,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 21:20:07,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-26 21:20:07,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 21:20:07,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-26 21:20:07,853 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-26 21:20:07,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:07,854 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-26 21:20:07,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:20:07,854 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-26 21:20:07,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:20:07,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:07,855 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-26 21:20:07,855 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:07,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:07,856 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-26 21:20:07,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:07,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:07,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:07,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:07,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:07,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:07,983 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 [2018-09-26 21:20:08,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:08,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:08,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:08,095 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:08,096 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-26 21:20:08,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:20:08,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:20:08,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:20:08,097 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-26 21:20:08,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:08,164 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-26 21:20:08,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:20:08,165 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-26 21:20:08,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:08,166 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:20:08,166 INFO L226 Difference]: Without dead ends: 9 [2018-09-26 21:20:08,167 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 [2018-09-26 21:20:08,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-26 21:20:08,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-26 21:20:08,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:20:08,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-26 21:20:08,170 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-26 21:20:08,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:08,170 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-26 21:20:08,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:20:08,171 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-26 21:20:08,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:20:08,171 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:08,171 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-26 21:20:08,172 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:08,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:08,172 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-26 21:20:08,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:08,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:08,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:08,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:08,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:08,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:08,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:08,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:08,287 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:08,311 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:08,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:08,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:08,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:08,346 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:08,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:20:08,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:20:08,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:20:08,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:20:08,348 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-26 21:20:08,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:08,384 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-26 21:20:08,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:20:08,385 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-26 21:20:08,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:08,386 INFO L225 Difference]: With dead ends: 13 [2018-09-26 21:20:08,386 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 21:20:08,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:20:08,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 21:20:08,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-26 21:20:08,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:20:08,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-26 21:20:08,390 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-26 21:20:08,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:08,390 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-26 21:20:08,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:20:08,391 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-26 21:20:08,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:20:08,391 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:08,392 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-26 21:20:08,392 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:08,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:08,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-26 21:20:08,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:08,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:08,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:08,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:08,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:08,476 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:08,476 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:20:08,493 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:08,529 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-26 21:20:08,530 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:08,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:08,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:08,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:20:08,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:20:08,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:20:08,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:20:08,564 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-26 21:20:08,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:08,601 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-26 21:20:08,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:20:08,604 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-26 21:20:08,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:08,605 INFO L225 Difference]: With dead ends: 15 [2018-09-26 21:20:08,605 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:20:08,605 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 [2018-09-26 21:20:08,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:20:08,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-26 21:20:08,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:20:08,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-26 21:20:08,610 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-26 21:20:08,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:08,610 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-26 21:20:08,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:20:08,610 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-26 21:20:08,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:20:08,611 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:08,611 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-26 21:20:08,611 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:08,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:08,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-26 21:20:08,612 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:08,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:08,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:08,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:08,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:08,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:08,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:08,908 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:08,928 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:08,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:08,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:08,965 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:08,965 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:20:08,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:20:08,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:20:08,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:20:08,967 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-26 21:20:09,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:09,005 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-26 21:20:09,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:20:09,005 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-26 21:20:09,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:09,006 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:20:09,007 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:20:09,007 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 [2018-09-26 21:20:09,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:20:09,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-26 21:20:09,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 21:20:09,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-26 21:20:09,012 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-26 21:20:09,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:09,012 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-26 21:20:09,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:20:09,012 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-26 21:20:09,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:20:09,013 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:09,013 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-26 21:20:09,014 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:09,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:09,014 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-26 21:20:09,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:09,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:09,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:09,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:09,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:09,156 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:09,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:09,157 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 [2018-09-26 21:20:09,166 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:09,195 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:20:09,196 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:09,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:09,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:09,231 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:20:09,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:20:09,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:20:09,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:20:09,232 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-26 21:20:09,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:09,266 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-26 21:20:09,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:20:09,267 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-26 21:20:09,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:09,268 INFO L225 Difference]: With dead ends: 19 [2018-09-26 21:20:09,268 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:20:09,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:20:09,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:20:09,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-26 21:20:09,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-26 21:20:09,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-26 21:20:09,273 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-26 21:20:09,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:09,273 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-26 21:20:09,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:20:09,274 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-26 21:20:09,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:20:09,274 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:09,275 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-26 21:20:09,275 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:09,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:09,275 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-26 21:20:09,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:09,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:09,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:09,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:09,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:09,499 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:09,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:09,514 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:09,527 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:20:09,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:09,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:09,561 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:09,561 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:20:09,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:20:09,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:20:09,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:20:09,562 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-26 21:20:09,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:09,603 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-26 21:20:09,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:20:09,606 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-26 21:20:09,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:09,607 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:20:09,607 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:20:09,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:20:09,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:20:09,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-26 21:20:09,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:20:09,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-26 21:20:09,613 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-26 21:20:09,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:09,613 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-26 21:20:09,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:20:09,614 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-26 21:20:09,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:20:09,614 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:09,615 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-26 21:20:09,615 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:09,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:09,615 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-26 21:20:09,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:09,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:09,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:09,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:09,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:09,800 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:09,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:20:09,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:09,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:09,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:09,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:20:09,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:20:09,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:20:09,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:20:09,885 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-26 21:20:10,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:10,123 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-26 21:20:10,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:20:10,123 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-26 21:20:10,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:10,124 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:20:10,124 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:20:10,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:20:10,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:20:10,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-26 21:20:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:20:10,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-26 21:20:10,131 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-26 21:20:10,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:10,131 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-26 21:20:10,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:20:10,131 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-26 21:20:10,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:20:10,132 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:10,132 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-26 21:20:10,134 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:10,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:10,134 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-26 21:20:10,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:10,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:10,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:10,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:10,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:10,285 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:10,285 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:20:10,302 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:10,310 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:10,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:10,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:10,350 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:10,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:20:10,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:20:10,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:20:10,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:20:10,352 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-26 21:20:10,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:10,394 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-26 21:20:10,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:20:10,395 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-26 21:20:10,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:10,396 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:20:10,397 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:20:10,398 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 [2018-09-26 21:20:10,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:20:10,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-26 21:20:10,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-26 21:20:10,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-26 21:20:10,403 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-26 21:20:10,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:10,403 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-26 21:20:10,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:20:10,403 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-26 21:20:10,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:20:10,404 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:10,404 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-26 21:20:10,404 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:10,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:10,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-26 21:20:10,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:10,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:10,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:10,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:10,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:10,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:10,569 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 [2018-09-26 21:20:10,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:10,593 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-26 21:20:10,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:10,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:10,605 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:10,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:10,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-26 21:20:10,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:20:10,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:20:10,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:20:10,628 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-09-26 21:20:10,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:10,672 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-26 21:20:10,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:20:10,673 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-26 21:20:10,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:10,673 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:20:10,674 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:20:10,674 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 [2018-09-26 21:20:10,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:20:10,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-26 21:20:10,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:20:10,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-26 21:20:10,678 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-26 21:20:10,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:10,679 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-26 21:20:10,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:20:10,679 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-26 21:20:10,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:20:10,680 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:10,680 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-26 21:20:10,680 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:10,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:10,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-09-26 21:20:10,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:10,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:10,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:10,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:10,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:11,035 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:11,036 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:11,036 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 [2018-09-26 21:20:11,044 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:11,055 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:11,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:11,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:11,089 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:11,090 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-26 21:20:11,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:20:11,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:20:11,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:20:11,091 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-09-26 21:20:11,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:11,133 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-26 21:20:11,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:20:11,133 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-26 21:20:11,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:11,134 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:20:11,134 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:20:11,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:20:11,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:20:11,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-26 21:20:11,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-26 21:20:11,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-26 21:20:11,140 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-26 21:20:11,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:11,141 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-26 21:20:11,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:20:11,141 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-26 21:20:11,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 21:20:11,142 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:11,142 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-26 21:20:11,142 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:11,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:11,143 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-09-26 21:20:11,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:11,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:11,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:11,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:11,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:11,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:11,415 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:11,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:11,427 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:11,451 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-26 21:20:11,452 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:11,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:11,499 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:11,500 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:20:11,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:20:11,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:20:11,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:20:11,501 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-09-26 21:20:11,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:11,756 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-26 21:20:11,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:20:11,757 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-26 21:20:11,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:11,758 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:20:11,758 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:20:11,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:20:11,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:20:11,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-26 21:20:11,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-26 21:20:11,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-26 21:20:11,766 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-26 21:20:11,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:11,766 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-26 21:20:11,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:20:11,766 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-26 21:20:11,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:20:11,767 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:11,767 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-26 21:20:11,768 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:11,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:11,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-09-26 21:20:11,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:11,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:11,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:11,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:11,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:12,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:12,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:12,026 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:12,043 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-26 21:20:12,043 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:12,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:12,056 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:12,077 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:12,078 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-26 21:20:12,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:20:12,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:20:12,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:20:12,079 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-09-26 21:20:12,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:12,274 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-26 21:20:12,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:20:12,275 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-26 21:20:12,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:12,276 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:20:12,276 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:20:12,276 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 [2018-09-26 21:20:12,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:20:12,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-26 21:20:12,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-26 21:20:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-26 21:20:12,281 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-26 21:20:12,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:12,281 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-26 21:20:12,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:20:12,281 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-26 21:20:12,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-26 21:20:12,282 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:12,282 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-26 21:20:12,283 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:12,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:12,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-09-26 21:20:12,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:12,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:12,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:12,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:12,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:12,629 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:12,629 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 [2018-09-26 21:20:12,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:12,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:12,684 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:12,684 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:20:12,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:20:12,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:20:12,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:20:12,685 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-09-26 21:20:12,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:12,740 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-26 21:20:12,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:20:12,741 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-26 21:20:12,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:12,742 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:20:12,742 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:20:12,743 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 [2018-09-26 21:20:12,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:20:12,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-26 21:20:12,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-26 21:20:12,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-26 21:20:12,748 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-26 21:20:12,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:12,748 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-26 21:20:12,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:20:12,748 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-26 21:20:12,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 21:20:12,749 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:12,749 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-26 21:20:12,750 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:12,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:12,750 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-09-26 21:20:12,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:12,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:12,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:12,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:12,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:12,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:12,995 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:12,996 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 [2018-09-26 21:20:13,008 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:13,049 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:13,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:13,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:13,089 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:13,089 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-26 21:20:13,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:20:13,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:20:13,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:20:13,091 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-09-26 21:20:13,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:13,132 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-26 21:20:13,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:20:13,132 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-26 21:20:13,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:13,134 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:20:13,134 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:20:13,135 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 [2018-09-26 21:20:13,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:20:13,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-26 21:20:13,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:20:13,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-26 21:20:13,140 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-26 21:20:13,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:13,141 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-26 21:20:13,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:20:13,141 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-26 21:20:13,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-26 21:20:13,142 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:13,142 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-26 21:20:13,142 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:13,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:13,143 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-09-26 21:20:13,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:13,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:13,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:13,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:13,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:13,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:13,403 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:13,403 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 [2018-09-26 21:20:13,414 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:13,443 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-26 21:20:13,443 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:13,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:13,456 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:13,478 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:13,479 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-26 21:20:13,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:20:13,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:20:13,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:20:13,480 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-09-26 21:20:13,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:13,527 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-26 21:20:13,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:20:13,530 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-26 21:20:13,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:13,530 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:20:13,530 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:20:13,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:20:13,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:20:13,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-26 21:20:13,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-26 21:20:13,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-26 21:20:13,535 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-26 21:20:13,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:13,536 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-26 21:20:13,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:20:13,536 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-26 21:20:13,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-26 21:20:13,537 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:13,537 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-26 21:20:13,537 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:13,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:13,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-09-26 21:20:13,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:13,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:13,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:13,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:13,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:13,853 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:13,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:13,861 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:13,901 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:13,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:13,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:13,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:13,946 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-26 21:20:13,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:20:13,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:20:13,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:20:13,948 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-09-26 21:20:14,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:14,059 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-26 21:20:14,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:20:14,062 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-26 21:20:14,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:14,062 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:20:14,062 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:20:14,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:20:14,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:20:14,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-26 21:20:14,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-26 21:20:14,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-26 21:20:14,071 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-26 21:20:14,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:14,071 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-26 21:20:14,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:20:14,071 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-26 21:20:14,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-26 21:20:14,072 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:14,072 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-26 21:20:14,072 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:14,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:14,073 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-09-26 21:20:14,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:14,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:14,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:14,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:14,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:14,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:14,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:14,538 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 [2018-09-26 21:20:14,546 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:14,581 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-26 21:20:14,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:14,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:14,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:14,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:20:14,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:20:14,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:20:14,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:20:14,627 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-09-26 21:20:14,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:14,799 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-26 21:20:14,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:20:14,800 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-26 21:20:14,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:14,800 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:20:14,800 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:20:14,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:20:14,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:20:14,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-26 21:20:14,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:20:14,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-26 21:20:14,807 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-26 21:20:14,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:14,807 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-26 21:20:14,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:20:14,807 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-26 21:20:14,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-26 21:20:14,808 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:14,808 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-09-26 21:20:14,808 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:14,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:14,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-09-26 21:20:14,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:14,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:14,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:14,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:14,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:15,139 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:15,140 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:15,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:15,148 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:15,199 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-26 21:20:15,200 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:15,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:15,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:15,245 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-26 21:20:15,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:20:15,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:20:15,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:20:15,246 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-09-26 21:20:15,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:15,423 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-26 21:20:15,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:20:15,423 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-26 21:20:15,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:15,424 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:20:15,425 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:20:15,426 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 [2018-09-26 21:20:15,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:20:15,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-26 21:20:15,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-26 21:20:15,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-26 21:20:15,430 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-26 21:20:15,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:15,430 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-26 21:20:15,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:20:15,431 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-26 21:20:15,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-26 21:20:15,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:15,432 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-26 21:20:15,432 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:15,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:15,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-09-26 21:20:15,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:15,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:15,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:15,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:15,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:15,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:15,739 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:15,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:15,740 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 [2018-09-26 21:20:15,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:15,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:15,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:15,783 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:15,815 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:15,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-26 21:20:15,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:20:15,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:20:15,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:20:15,817 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-09-26 21:20:16,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:16,025 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-26 21:20:16,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:20:16,026 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-26 21:20:16,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:16,027 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:20:16,028 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:20:16,029 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 [2018-09-26 21:20:16,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:20:16,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-26 21:20:16,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-26 21:20:16,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-26 21:20:16,035 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-26 21:20:16,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:16,035 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-26 21:20:16,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:20:16,036 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-26 21:20:16,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-26 21:20:16,036 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:16,036 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-09-26 21:20:16,037 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:16,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:16,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-09-26 21:20:16,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:16,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:16,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:16,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:16,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:16,382 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:16,382 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:16,395 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:16,407 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:16,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:16,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:16,452 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:16,452 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-26 21:20:16,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:20:16,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:20:16,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:20:16,454 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-09-26 21:20:16,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:16,584 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-26 21:20:16,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:20:16,585 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-26 21:20:16,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:16,586 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:20:16,586 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:20:16,587 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 [2018-09-26 21:20:16,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:20:16,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-26 21:20:16,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-26 21:20:16,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-26 21:20:16,592 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-26 21:20:16,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:16,592 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-26 21:20:16,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:20:16,592 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-26 21:20:16,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-26 21:20:16,593 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:16,593 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-26 21:20:16,594 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:16,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:16,594 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-09-26 21:20:16,594 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:16,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:16,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:16,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:16,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:17,108 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:17,109 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:17,109 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:17,117 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:17,142 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-26 21:20:17,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:17,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:17,181 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:17,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-26 21:20:17,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:20:17,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:20:17,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:20:17,183 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-09-26 21:20:17,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:17,458 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-26 21:20:17,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:20:17,459 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-26 21:20:17,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:17,460 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:20:17,460 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:20:17,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:20:17,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:20:17,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-26 21:20:17,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-26 21:20:17,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-26 21:20:17,464 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-26 21:20:17,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:17,465 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-26 21:20:17,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:20:17,465 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-26 21:20:17,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-26 21:20:17,466 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:17,466 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-09-26 21:20:17,466 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:17,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:17,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-09-26 21:20:17,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:17,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:17,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:17,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:17,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:17,818 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:17,819 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:17,819 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 [2018-09-26 21:20:17,827 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:17,842 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:17,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:17,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:17,882 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:17,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-26 21:20:17,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:20:17,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:20:17,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:20:17,883 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-09-26 21:20:17,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:17,946 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-26 21:20:17,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:20:17,947 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-26 21:20:17,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:17,948 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:20:17,948 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:20:17,948 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 [2018-09-26 21:20:17,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:20:17,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-26 21:20:17,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-26 21:20:17,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-26 21:20:17,953 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-26 21:20:17,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:17,953 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-26 21:20:17,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:20:17,953 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-26 21:20:17,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-26 21:20:17,954 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:17,954 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-26 21:20:17,955 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:17,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:17,956 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-09-26 21:20:17,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:17,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:17,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:17,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:17,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:18,450 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:18,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:18,458 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:18,477 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-26 21:20:18,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:18,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:18,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:18,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 21:20:18,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:20:18,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:20:18,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:20:18,526 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-09-26 21:20:18,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:18,675 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-26 21:20:18,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:20:18,675 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-26 21:20:18,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:18,676 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:20:18,676 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:20:18,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:20:18,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:20:18,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-26 21:20:18,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-26 21:20:18,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-26 21:20:18,681 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-26 21:20:18,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:18,681 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-26 21:20:18,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:20:18,681 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-26 21:20:18,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-26 21:20:18,682 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:18,682 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-09-26 21:20:18,682 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:18,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:18,682 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-09-26 21:20:18,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:18,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:18,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:18,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:18,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:19,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:19,771 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 [2018-09-26 21:20:19,779 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:19,842 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-26 21:20:19,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:19,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:19,882 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:19,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-26 21:20:19,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:20:19,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:20:19,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:20:19,883 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-09-26 21:20:19,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:19,942 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-26 21:20:19,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:20:19,943 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-26 21:20:19,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:19,944 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:20:19,944 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:20:19,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:20:19,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:20:19,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-26 21:20:19,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-26 21:20:19,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-26 21:20:19,949 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-26 21:20:19,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:19,950 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-26 21:20:19,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:20:19,950 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-26 21:20:19,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-26 21:20:19,951 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:19,951 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-09-26 21:20:19,951 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:19,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:19,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-09-26 21:20:19,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:19,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:19,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:19,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:19,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:20,566 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:20,566 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:20,566 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 [2018-09-26 21:20:20,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:20,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:20,648 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:20,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-26 21:20:20,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:20:20,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:20:20,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:20:20,649 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-09-26 21:20:20,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:20,719 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-26 21:20:20,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:20:20,721 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-26 21:20:20,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:20,722 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:20:20,722 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:20:20,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:20:20,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:20:20,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-26 21:20:20,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-26 21:20:20,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-26 21:20:20,726 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-26 21:20:20,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:20,727 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-26 21:20:20,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:20:20,727 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-26 21:20:20,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-26 21:20:20,727 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:20,728 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-09-26 21:20:20,728 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:20,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:20,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-09-26 21:20:20,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:20,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:20,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:20,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:20,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:20,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:21,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:21,609 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 [2018-09-26 21:20:21,617 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:21,633 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:21,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:21,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:21,677 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:21,678 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-26 21:20:21,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:20:21,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:20:21,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:20:21,679 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-09-26 21:20:21,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:21,732 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-26 21:20:21,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:20:21,732 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-26 21:20:21,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:21,733 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:20:21,733 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:20:21,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:20:21,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:20:21,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-26 21:20:21,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-26 21:20:21,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-26 21:20:21,736 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-26 21:20:21,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:21,736 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-26 21:20:21,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:20:21,737 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-26 21:20:21,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-26 21:20:21,737 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:21,737 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-09-26 21:20:21,738 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:21,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:21,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-09-26 21:20:21,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:21,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:21,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:21,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:21,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:21,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:22,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:22,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:22,406 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:22,432 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-26 21:20:22,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:22,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:22,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:22,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-26 21:20:22,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:20:22,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:20:22,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:20:22,477 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-09-26 21:20:22,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:22,531 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-26 21:20:22,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:20:22,531 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-26 21:20:22,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:22,532 INFO L225 Difference]: With dead ends: 63 [2018-09-26 21:20:22,532 INFO L226 Difference]: Without dead ends: 61 [2018-09-26 21:20:22,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:20:22,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-26 21:20:22,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-26 21:20:22,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-26 21:20:22,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-26 21:20:22,537 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-26 21:20:22,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:22,537 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-26 21:20:22,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:20:22,537 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-26 21:20:22,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-26 21:20:22,538 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:22,538 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-09-26 21:20:22,538 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:22,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:22,539 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-09-26 21:20:22,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:22,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:22,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:22,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:22,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:22,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:23,256 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:23,256 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 [2018-09-26 21:20:23,264 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:23,281 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:23,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:23,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:23,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:23,319 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-26 21:20:23,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:20:23,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:20:23,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:20:23,320 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-09-26 21:20:23,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:23,389 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-26 21:20:23,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:20:23,390 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-26 21:20:23,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:23,391 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:20:23,391 INFO L226 Difference]: Without dead ends: 63 [2018-09-26 21:20:23,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:20:23,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-26 21:20:23,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-26 21:20:23,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-26 21:20:23,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-26 21:20:23,396 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-26 21:20:23,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:23,396 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-26 21:20:23,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:20:23,396 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-26 21:20:23,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-26 21:20:23,397 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:23,397 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-09-26 21:20:23,397 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:23,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:23,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-09-26 21:20:23,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:23,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:23,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:23,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:23,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:24,059 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:24,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:24,066 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:24,091 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-26 21:20:24,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:24,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:24,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:24,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-26 21:20:24,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:20:24,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:20:24,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:20:24,129 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-09-26 21:20:24,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:24,190 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-26 21:20:24,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:20:24,190 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-26 21:20:24,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:24,191 INFO L225 Difference]: With dead ends: 67 [2018-09-26 21:20:24,191 INFO L226 Difference]: Without dead ends: 65 [2018-09-26 21:20:24,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:20:24,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-26 21:20:24,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-26 21:20:24,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-26 21:20:24,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-26 21:20:24,196 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-09-26 21:20:24,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:24,196 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-26 21:20:24,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:20:24,197 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-26 21:20:24,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-26 21:20:24,197 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:24,197 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-09-26 21:20:24,197 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:24,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:24,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-09-26 21:20:24,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:24,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:24,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:24,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:24,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:24,748 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:24,748 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 [2018-09-26 21:20:24,757 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:24,790 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-26 21:20:24,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:24,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:24,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:24,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-26 21:20:24,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:20:24,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:20:24,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:20:24,836 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-09-26 21:20:24,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:24,993 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-26 21:20:24,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:20:24,994 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-26 21:20:24,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:24,994 INFO L225 Difference]: With dead ends: 69 [2018-09-26 21:20:24,994 INFO L226 Difference]: Without dead ends: 67 [2018-09-26 21:20:24,995 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 [2018-09-26 21:20:24,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-26 21:20:24,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-26 21:20:24,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-26 21:20:24,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-26 21:20:24,998 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-09-26 21:20:24,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:24,998 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-26 21:20:24,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:20:24,998 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-26 21:20:24,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-26 21:20:24,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:24,999 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-09-26 21:20:24,999 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:24,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:24,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-09-26 21:20:24,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:25,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:25,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:25,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:25,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:25,508 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:25,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:25,509 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:25,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:25,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:25,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:25,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-26 21:20:25,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:20:25,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:20:25,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:20:25,570 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-09-26 21:20:25,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:25,628 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-26 21:20:25,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:20:25,629 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-26 21:20:25,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:25,629 INFO L225 Difference]: With dead ends: 71 [2018-09-26 21:20:25,630 INFO L226 Difference]: Without dead ends: 69 [2018-09-26 21:20:25,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:20:25,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-26 21:20:25,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-26 21:20:25,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-26 21:20:25,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-26 21:20:25,633 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-09-26 21:20:25,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:25,633 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-26 21:20:25,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:20:25,633 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-26 21:20:25,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-26 21:20:25,634 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:25,634 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-09-26 21:20:25,634 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:25,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:25,634 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-09-26 21:20:25,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:25,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:25,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:25,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:25,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:26,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:26,426 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 [2018-09-26 21:20:26,434 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:26,466 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:26,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:26,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:26,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:26,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-26 21:20:26,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:20:26,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:20:26,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:20:26,514 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-09-26 21:20:26,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:26,575 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-26 21:20:26,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:20:26,576 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-26 21:20:26,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:26,577 INFO L225 Difference]: With dead ends: 73 [2018-09-26 21:20:26,577 INFO L226 Difference]: Without dead ends: 71 [2018-09-26 21:20:26,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:20:26,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-26 21:20:26,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-26 21:20:26,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-26 21:20:26,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-26 21:20:26,582 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-09-26 21:20:26,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:26,582 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-26 21:20:26,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:20:26,582 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-26 21:20:26,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-26 21:20:26,583 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:26,583 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-09-26 21:20:26,583 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:26,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:26,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-09-26 21:20:26,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:26,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:26,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:26,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:26,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:27,890 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:27,890 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:27,898 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:27,927 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-26 21:20:27,927 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:27,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:27,960 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:27,960 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-26 21:20:27,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:20:27,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:20:27,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:20:27,961 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-09-26 21:20:28,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:28,042 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-26 21:20:28,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:20:28,043 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-26 21:20:28,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:28,044 INFO L225 Difference]: With dead ends: 75 [2018-09-26 21:20:28,044 INFO L226 Difference]: Without dead ends: 73 [2018-09-26 21:20:28,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:20:28,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-26 21:20:28,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-26 21:20:28,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-26 21:20:28,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-26 21:20:28,048 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-09-26 21:20:28,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:28,048 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-26 21:20:28,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:20:28,049 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-26 21:20:28,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-26 21:20:28,049 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:28,049 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-09-26 21:20:28,050 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:28,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:28,050 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-09-26 21:20:28,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:28,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:28,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:28,051 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:28,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:28,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:28,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:28,905 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 [2018-09-26 21:20:28,913 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:28,932 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:28,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:28,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:28,971 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:28,971 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-26 21:20:28,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-26 21:20:28,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-26 21:20:28,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:20:28,973 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-09-26 21:20:29,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:29,113 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-26 21:20:29,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:20:29,114 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-26 21:20:29,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:29,115 INFO L225 Difference]: With dead ends: 77 [2018-09-26 21:20:29,115 INFO L226 Difference]: Without dead ends: 75 [2018-09-26 21:20:29,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:20:29,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-26 21:20:29,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-26 21:20:29,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-26 21:20:29,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-26 21:20:29,120 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-09-26 21:20:29,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:29,121 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-26 21:20:29,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-26 21:20:29,121 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-26 21:20:29,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-26 21:20:29,121 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:29,121 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-09-26 21:20:29,122 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:29,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:29,122 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-09-26 21:20:29,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:29,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:29,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:29,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:29,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:29,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:29,719 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:29,719 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 [2018-09-26 21:20:29,728 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:29,758 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-26 21:20:29,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:29,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:29,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:29,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-26 21:20:29,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:20:29,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:20:29,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:20:29,796 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-09-26 21:20:29,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:29,854 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-26 21:20:29,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:20:29,856 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-26 21:20:29,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:29,857 INFO L225 Difference]: With dead ends: 79 [2018-09-26 21:20:29,857 INFO L226 Difference]: Without dead ends: 77 [2018-09-26 21:20:29,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:20:29,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-26 21:20:29,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-26 21:20:29,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-26 21:20:29,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-26 21:20:29,859 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-09-26 21:20:29,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:29,860 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-26 21:20:29,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:20:29,860 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-26 21:20:29,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-26 21:20:29,860 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:29,860 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-09-26 21:20:29,860 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:29,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:29,861 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-09-26 21:20:29,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:29,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:29,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:29,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:29,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:30,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:30,482 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 [2018-09-26 21:20:30,489 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:30,522 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-26 21:20:30,523 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:30,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:30,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:30,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:30,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-26 21:20:30,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-26 21:20:30,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-26 21:20:30,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:20:30,573 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-09-26 21:20:31,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:31,237 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-26 21:20:31,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:20:31,240 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-26 21:20:31,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:31,240 INFO L225 Difference]: With dead ends: 81 [2018-09-26 21:20:31,241 INFO L226 Difference]: Without dead ends: 79 [2018-09-26 21:20:31,242 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 [2018-09-26 21:20:31,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-26 21:20:31,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-26 21:20:31,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-26 21:20:31,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-26 21:20:31,245 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-09-26 21:20:31,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:31,245 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-26 21:20:31,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-26 21:20:31,246 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-26 21:20:31,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-26 21:20:31,246 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:31,246 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-09-26 21:20:31,248 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:31,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:31,249 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-09-26 21:20:31,249 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:31,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:31,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:31,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:31,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:32,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:32,683 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 [2018-09-26 21:20:32,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:32,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:32,771 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:32,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-26 21:20:32,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:20:32,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:20:32,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:20:32,772 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-09-26 21:20:32,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:32,848 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-26 21:20:32,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:20:32,849 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-26 21:20:32,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:32,850 INFO L225 Difference]: With dead ends: 83 [2018-09-26 21:20:32,850 INFO L226 Difference]: Without dead ends: 81 [2018-09-26 21:20:32,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:20:32,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-26 21:20:32,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-26 21:20:32,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-26 21:20:32,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-26 21:20:32,854 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-09-26 21:20:32,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:32,854 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-26 21:20:32,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:20:32,854 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-26 21:20:32,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-26 21:20:32,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:32,855 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-09-26 21:20:32,855 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:32,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:32,855 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-09-26 21:20:32,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:32,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:32,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:32,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:32,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:33,522 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:33,523 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 [2018-09-26 21:20:33,529 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:33,552 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:33,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:33,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:33,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:33,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:33,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-26 21:20:33,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:20:33,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:20:33,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:20:33,603 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-09-26 21:20:33,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:33,692 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-26 21:20:33,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:20:33,693 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-26 21:20:33,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:33,694 INFO L225 Difference]: With dead ends: 85 [2018-09-26 21:20:33,694 INFO L226 Difference]: Without dead ends: 83 [2018-09-26 21:20:33,695 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 [2018-09-26 21:20:33,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-26 21:20:33,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-26 21:20:33,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-26 21:20:33,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-26 21:20:33,699 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-09-26 21:20:33,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:33,699 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-26 21:20:33,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:20:33,699 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-26 21:20:33,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-26 21:20:33,699 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:33,700 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-09-26 21:20:33,700 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:33,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:33,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-09-26 21:20:33,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:33,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:33,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:33,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:33,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:34,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:34,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:34,411 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 [2018-09-26 21:20:34,419 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:34,454 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-26 21:20:34,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:34,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:34,497 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:34,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-26 21:20:34,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:20:34,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:20:34,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:20:34,499 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-09-26 21:20:34,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:34,633 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-26 21:20:34,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:20:34,633 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-26 21:20:34,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:34,634 INFO L225 Difference]: With dead ends: 87 [2018-09-26 21:20:34,634 INFO L226 Difference]: Without dead ends: 85 [2018-09-26 21:20:34,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:20:34,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-26 21:20:34,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-26 21:20:34,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-26 21:20:34,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-26 21:20:34,637 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-09-26 21:20:34,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:34,637 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-26 21:20:34,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:20:34,638 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-26 21:20:34,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-26 21:20:34,638 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:34,638 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-09-26 21:20:34,638 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:34,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:34,639 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-09-26 21:20:34,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:34,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:34,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:34,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:34,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:35,362 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:35,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:35,369 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:35,391 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:35,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:35,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:35,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:35,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:35,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-26 21:20:35,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-26 21:20:35,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-26 21:20:35,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:20:35,432 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-09-26 21:20:35,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:35,509 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-26 21:20:35,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:20:35,509 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-26 21:20:35,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:35,510 INFO L225 Difference]: With dead ends: 89 [2018-09-26 21:20:35,511 INFO L226 Difference]: Without dead ends: 87 [2018-09-26 21:20:35,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:20:35,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-26 21:20:35,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-26 21:20:35,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-26 21:20:35,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-26 21:20:35,515 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-09-26 21:20:35,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:35,515 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-26 21:20:35,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-26 21:20:35,515 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-26 21:20:35,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-26 21:20:35,516 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:35,516 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-09-26 21:20:35,516 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:35,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:35,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-09-26 21:20:35,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:35,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:35,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:35,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:35,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:36,407 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:36,407 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 [2018-09-26 21:20:36,415 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:36,452 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-26 21:20:36,453 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:36,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:36,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:36,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-26 21:20:36,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:20:36,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:20:36,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:20:36,495 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-09-26 21:20:36,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:36,580 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-26 21:20:36,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:20:36,580 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-26 21:20:36,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:36,581 INFO L225 Difference]: With dead ends: 91 [2018-09-26 21:20:36,581 INFO L226 Difference]: Without dead ends: 89 [2018-09-26 21:20:36,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:20:36,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-26 21:20:36,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-26 21:20:36,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-26 21:20:36,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-26 21:20:36,586 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-09-26 21:20:36,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:36,586 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-26 21:20:36,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:20:36,586 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-26 21:20:36,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-26 21:20:36,587 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:36,587 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-09-26 21:20:36,587 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:36,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:36,587 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-09-26 21:20:36,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:36,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:36,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:36,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:36,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:37,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:37,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:37,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:37,654 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:37,692 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-26 21:20:37,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:37,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:37,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:37,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-26 21:20:37,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-26 21:20:37,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-26 21:20:37,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:20:37,743 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-09-26 21:20:37,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:37,811 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-26 21:20:37,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:20:37,812 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-26 21:20:37,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:37,813 INFO L225 Difference]: With dead ends: 93 [2018-09-26 21:20:37,813 INFO L226 Difference]: Without dead ends: 91 [2018-09-26 21:20:37,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:20:37,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-26 21:20:37,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-26 21:20:37,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-26 21:20:37,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-26 21:20:37,819 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-09-26 21:20:37,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:37,819 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-26 21:20:37,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-26 21:20:37,820 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-26 21:20:37,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-26 21:20:37,820 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:37,820 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-09-26 21:20:37,821 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:37,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:37,821 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-09-26 21:20:37,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:37,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:37,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:37,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:37,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:39,886 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:39,886 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 [2018-09-26 21:20:39,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:39,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:39,957 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:39,958 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-26 21:20:39,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:20:39,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:20:39,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:20:39,959 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-09-26 21:20:40,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:40,051 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-26 21:20:40,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:20:40,052 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-26 21:20:40,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:40,053 INFO L225 Difference]: With dead ends: 95 [2018-09-26 21:20:40,053 INFO L226 Difference]: Without dead ends: 93 [2018-09-26 21:20:40,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:20:40,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-26 21:20:40,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-26 21:20:40,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-26 21:20:40,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-26 21:20:40,056 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-09-26 21:20:40,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:40,056 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-26 21:20:40,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:20:40,057 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-26 21:20:40,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-26 21:20:40,057 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:40,057 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-09-26 21:20:40,058 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:40,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:40,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-09-26 21:20:40,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:40,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:40,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:40,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:40,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:40,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:40,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:40,882 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:40,905 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:40,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:40,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:40,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:40,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:40,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-26 21:20:40,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:20:40,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:20:40,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:20:40,942 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-09-26 21:20:41,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:41,228 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-26 21:20:41,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:20:41,229 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-26 21:20:41,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:41,230 INFO L225 Difference]: With dead ends: 97 [2018-09-26 21:20:41,230 INFO L226 Difference]: Without dead ends: 95 [2018-09-26 21:20:41,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:20:41,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-26 21:20:41,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-26 21:20:41,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-26 21:20:41,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-26 21:20:41,234 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-09-26 21:20:41,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:41,234 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-26 21:20:41,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:20:41,235 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-26 21:20:41,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-26 21:20:41,235 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:41,235 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-09-26 21:20:41,236 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:41,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:41,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-09-26 21:20:41,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:41,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:41,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:41,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:41,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:42,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:42,439 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 [2018-09-26 21:20:42,450 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:42,493 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-26 21:20:42,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:42,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:42,545 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:42,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-26 21:20:42,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:20:42,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:20:42,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:20:42,547 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-09-26 21:20:42,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:42,650 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-26 21:20:42,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:20:42,650 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-26 21:20:42,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:42,651 INFO L225 Difference]: With dead ends: 99 [2018-09-26 21:20:42,651 INFO L226 Difference]: Without dead ends: 97 [2018-09-26 21:20:42,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:20:42,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-26 21:20:42,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-26 21:20:42,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-26 21:20:42,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-26 21:20:42,655 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-09-26 21:20:42,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:42,655 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-26 21:20:42,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:20:42,655 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-26 21:20:42,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-26 21:20:42,655 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:42,655 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-09-26 21:20:42,656 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:42,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:42,656 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-09-26 21:20:42,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:42,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:42,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:42,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:42,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:43,654 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:43,654 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:43,661 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:43,687 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:43,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:43,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:43,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:43,735 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:43,735 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-26 21:20:43,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-26 21:20:43,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-26 21:20:43,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:20:43,736 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-09-26 21:20:43,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:43,828 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-26 21:20:43,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:20:43,829 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-26 21:20:43,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:43,830 INFO L225 Difference]: With dead ends: 101 [2018-09-26 21:20:43,830 INFO L226 Difference]: Without dead ends: 99 [2018-09-26 21:20:43,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:20:43,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-26 21:20:43,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-26 21:20:43,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-26 21:20:43,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-26 21:20:43,834 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-09-26 21:20:43,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:43,835 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-26 21:20:43,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-26 21:20:43,835 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-26 21:20:43,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-26 21:20:43,835 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:43,836 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-09-26 21:20:43,836 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:43,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:43,836 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-09-26 21:20:43,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:43,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:43,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:43,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:43,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:44,757 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:44,757 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 [2018-09-26 21:20:44,764 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:44,806 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-26 21:20:44,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:44,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:44,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:44,845 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:44,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-26 21:20:44,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:20:44,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:20:44,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:20:44,846 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-09-26 21:20:44,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:44,938 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-26 21:20:44,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:20:44,938 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-26 21:20:44,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:44,939 INFO L225 Difference]: With dead ends: 103 [2018-09-26 21:20:44,939 INFO L226 Difference]: Without dead ends: 101 [2018-09-26 21:20:44,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:20:44,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-26 21:20:44,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-26 21:20:44,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-26 21:20:44,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-26 21:20:44,943 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-09-26 21:20:44,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:44,943 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-26 21:20:44,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:20:44,943 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-26 21:20:44,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-26 21:20:44,944 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:44,944 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-09-26 21:20:44,944 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:44,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:44,945 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-09-26 21:20:44,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:44,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:44,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:44,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:44,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:44,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:46,024 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:46,024 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 [2018-09-26 21:20:46,031 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:46,075 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-26 21:20:46,075 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:46,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:46,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:46,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-26 21:20:46,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-26 21:20:46,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-26 21:20:46,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:20:46,116 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-09-26 21:20:46,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:46,224 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-26 21:20:46,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:20:46,224 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-26 21:20:46,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:46,226 INFO L225 Difference]: With dead ends: 105 [2018-09-26 21:20:46,226 INFO L226 Difference]: Without dead ends: 103 [2018-09-26 21:20:46,226 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 [2018-09-26 21:20:46,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-26 21:20:46,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-26 21:20:46,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-26 21:20:46,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-26 21:20:46,229 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-09-26 21:20:46,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:46,230 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-26 21:20:46,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-26 21:20:46,230 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-26 21:20:46,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-26 21:20:46,230 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:46,231 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-09-26 21:20:46,231 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:46,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:46,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-09-26 21:20:46,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:46,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:46,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:46,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:46,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:47,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:47,230 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 [2018-09-26 21:20:47,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:47,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:47,324 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:47,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-26 21:20:47,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:20:47,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:20:47,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:20:47,325 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-09-26 21:20:47,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:47,460 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-26 21:20:47,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:20:47,460 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-26 21:20:47,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:47,461 INFO L225 Difference]: With dead ends: 107 [2018-09-26 21:20:47,461 INFO L226 Difference]: Without dead ends: 105 [2018-09-26 21:20:47,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:20:47,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-26 21:20:47,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-26 21:20:47,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-26 21:20:47,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-26 21:20:47,465 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-09-26 21:20:47,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:47,466 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-26 21:20:47,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:20:47,466 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-26 21:20:47,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-26 21:20:47,466 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:47,467 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-09-26 21:20:47,467 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:47,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:47,467 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-09-26 21:20:47,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:47,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:47,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:47,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:47,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:47,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:48,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:48,919 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:48,919 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 [2018-09-26 21:20:48,927 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:48,978 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:48,979 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:48,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:49,040 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:49,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-26 21:20:49,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:20:49,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:20:49,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:20:49,042 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-09-26 21:20:49,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:49,324 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-26 21:20:49,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:20:49,325 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-26 21:20:49,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:49,326 INFO L225 Difference]: With dead ends: 109 [2018-09-26 21:20:49,327 INFO L226 Difference]: Without dead ends: 107 [2018-09-26 21:20:49,327 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 [2018-09-26 21:20:49,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-26 21:20:49,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-26 21:20:49,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-26 21:20:49,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-26 21:20:49,331 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-09-26 21:20:49,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:49,331 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-26 21:20:49,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:20:49,331 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-26 21:20:49,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-26 21:20:49,332 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:49,332 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-09-26 21:20:49,332 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:49,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:49,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-09-26 21:20:49,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:49,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:49,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:49,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:49,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:50,473 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:50,473 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 [2018-09-26 21:20:50,481 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:50,526 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-26 21:20:50,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:50,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:50,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:50,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:50,583 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-26 21:20:50,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:20:50,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:20:50,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:20:50,586 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-09-26 21:20:50,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:50,742 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-26 21:20:50,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:20:50,743 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-26 21:20:50,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:50,744 INFO L225 Difference]: With dead ends: 111 [2018-09-26 21:20:50,744 INFO L226 Difference]: Without dead ends: 109 [2018-09-26 21:20:50,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:20:50,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-26 21:20:50,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-26 21:20:50,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-26 21:20:50,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-26 21:20:50,748 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-09-26 21:20:50,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:50,748 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-26 21:20:50,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:20:50,748 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-26 21:20:50,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-26 21:20:50,749 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:50,749 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-09-26 21:20:50,749 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:50,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:50,749 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-09-26 21:20:50,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:50,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:50,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:50,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:50,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:51,907 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:51,907 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:51,922 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:51,969 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:51,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:51,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:52,026 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:52,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-26 21:20:52,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-26 21:20:52,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-26 21:20:52,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:20:52,027 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-09-26 21:20:52,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:52,197 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-26 21:20:52,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:20:52,197 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-26 21:20:52,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:52,198 INFO L225 Difference]: With dead ends: 113 [2018-09-26 21:20:52,198 INFO L226 Difference]: Without dead ends: 111 [2018-09-26 21:20:52,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:20:52,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-26 21:20:52,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-26 21:20:52,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-26 21:20:52,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-26 21:20:52,202 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-09-26 21:20:52,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:52,202 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-26 21:20:52,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-26 21:20:52,202 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-26 21:20:52,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-26 21:20:52,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:52,203 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-09-26 21:20:52,203 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:52,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:52,204 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-09-26 21:20:52,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:52,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:52,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:52,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:52,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:53,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:53,705 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 [2018-09-26 21:20:53,720 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:53,833 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-26 21:20:53,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:53,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:53,875 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:53,875 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-26 21:20:53,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:20:53,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:20:53,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:20:53,877 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-09-26 21:20:53,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:53,988 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-26 21:20:53,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:20:53,989 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-26 21:20:53,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:53,990 INFO L225 Difference]: With dead ends: 115 [2018-09-26 21:20:53,990 INFO L226 Difference]: Without dead ends: 113 [2018-09-26 21:20:53,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:20:53,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-26 21:20:53,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-26 21:20:53,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-26 21:20:53,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-26 21:20:53,993 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-09-26 21:20:53,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:53,994 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-26 21:20:53,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:20:53,994 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-26 21:20:53,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-26 21:20:53,994 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:53,995 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-09-26 21:20:53,995 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:53,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:53,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-09-26 21:20:53,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:53,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:53,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:53,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:53,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:55,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:55,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:55,658 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 [2018-09-26 21:20:55,665 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:55,715 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-26 21:20:55,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:55,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:55,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:55,755 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:55,755 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-26 21:20:55,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-26 21:20:55,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-26 21:20:55,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:20:55,757 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-09-26 21:20:55,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:55,980 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-26 21:20:55,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:20:55,980 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-26 21:20:55,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:55,983 INFO L225 Difference]: With dead ends: 117 [2018-09-26 21:20:55,983 INFO L226 Difference]: Without dead ends: 115 [2018-09-26 21:20:55,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:20:55,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-26 21:20:55,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-26 21:20:55,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-26 21:20:55,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-26 21:20:55,987 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-09-26 21:20:55,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:55,988 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-26 21:20:55,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-26 21:20:55,988 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-26 21:20:55,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-26 21:20:55,988 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:55,989 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-09-26 21:20:55,989 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:55,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:55,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-09-26 21:20:55,989 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:55,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:55,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:55,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:55,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:57,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:57,392 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:57,392 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 [2018-09-26 21:20:57,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:57,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:57,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:57,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:57,502 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-26 21:20:57,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:20:57,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:20:57,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:20:57,503 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-09-26 21:20:57,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:57,850 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-26 21:20:57,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:20:57,851 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-26 21:20:57,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:57,851 INFO L225 Difference]: With dead ends: 119 [2018-09-26 21:20:57,851 INFO L226 Difference]: Without dead ends: 117 [2018-09-26 21:20:57,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:20:57,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-26 21:20:57,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-26 21:20:57,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-26 21:20:57,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-26 21:20:57,856 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-09-26 21:20:57,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:57,856 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-26 21:20:57,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:20:57,856 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-26 21:20:57,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-26 21:20:57,857 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:57,857 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-09-26 21:20:57,857 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:57,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:57,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-09-26 21:20:57,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:57,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:57,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:57,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:57,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:59,104 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:59,104 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 [2018-09-26 21:20:59,111 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:59,142 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:59,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:59,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:59,199 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:59,200 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-26 21:20:59,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-26 21:20:59,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-26 21:20:59,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:20:59,201 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-09-26 21:20:59,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:59,450 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-26 21:20:59,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:20:59,451 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-26 21:20:59,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:59,452 INFO L225 Difference]: With dead ends: 121 [2018-09-26 21:20:59,452 INFO L226 Difference]: Without dead ends: 119 [2018-09-26 21:20:59,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:20:59,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-26 21:20:59,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-26 21:20:59,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-26 21:20:59,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-26 21:20:59,455 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-09-26 21:20:59,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:59,456 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-26 21:20:59,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-26 21:20:59,456 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-26 21:20:59,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-26 21:20:59,456 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:59,457 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-09-26 21:20:59,457 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:59,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:59,457 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-09-26 21:20:59,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:59,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:59,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:59,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:59,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:01,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:01,214 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 [2018-09-26 21:21:01,221 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:21:01,280 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-26 21:21:01,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:01,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:01,340 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:01,340 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-26 21:21:01,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:21:01,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:21:01,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:21:01,341 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-09-26 21:21:01,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:01,586 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-26 21:21:01,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-26 21:21:01,586 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-26 21:21:01,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:01,587 INFO L225 Difference]: With dead ends: 123 [2018-09-26 21:21:01,588 INFO L226 Difference]: Without dead ends: 121 [2018-09-26 21:21:01,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:21:01,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-26 21:21:01,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-26 21:21:01,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-26 21:21:01,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-26 21:21:01,592 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-09-26 21:21:01,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:01,592 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-26 21:21:01,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:21:01,592 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-26 21:21:01,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-26 21:21:01,593 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:01,593 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-09-26 21:21:01,593 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:01,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:01,593 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-09-26 21:21:01,594 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:01,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:01,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:01,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:01,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:03,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:03,683 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 [2018-09-26 21:21:03,693 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:21:03,723 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:21:03,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:03,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:03,783 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:03,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-26 21:21:03,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-26 21:21:03,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-26 21:21:03,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-26 21:21:03,785 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-09-26 21:21:05,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:05,014 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-26 21:21:05,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-26 21:21:05,016 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-09-26 21:21:05,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:05,017 INFO L225 Difference]: With dead ends: 125 [2018-09-26 21:21:05,017 INFO L226 Difference]: Without dead ends: 123 [2018-09-26 21:21:05,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-26 21:21:05,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-26 21:21:05,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-26 21:21:05,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-26 21:21:05,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-26 21:21:05,021 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-09-26 21:21:05,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:05,021 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-26 21:21:05,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-26 21:21:05,021 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-26 21:21:05,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-26 21:21:05,022 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:05,022 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-09-26 21:21:05,022 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:05,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:05,023 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-09-26 21:21:05,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:05,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:05,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:05,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:05,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:07,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:07,076 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:07,076 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 [2018-09-26 21:21:07,084 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:21:07,137 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-26 21:21:07,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:07,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:07,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:07,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:07,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-26 21:21:07,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-26 21:21:07,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-26 21:21:07,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:21:07,197 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-09-26 21:21:07,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:07,415 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-26 21:21:07,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-26 21:21:07,415 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-09-26 21:21:07,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:07,416 INFO L225 Difference]: With dead ends: 127 [2018-09-26 21:21:07,416 INFO L226 Difference]: Without dead ends: 125 [2018-09-26 21:21:07,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:21:07,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-26 21:21:07,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-26 21:21:07,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-26 21:21:07,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-26 21:21:07,420 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-09-26 21:21:07,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:07,420 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-26 21:21:07,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-26 21:21:07,420 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-26 21:21:07,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-26 21:21:07,421 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:07,421 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-09-26 21:21:07,421 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:07,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:07,421 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-09-26 21:21:07,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:07,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:07,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:07,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:07,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:09,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:09,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:09,135 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 [2018-09-26 21:21:09,143 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:21:09,197 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-26 21:21:09,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:09,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:09,260 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:09,260 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-26 21:21:09,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-26 21:21:09,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-26 21:21:09,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-26 21:21:09,262 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-09-26 21:21:09,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:09,407 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-26 21:21:09,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:21:09,408 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-09-26 21:21:09,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:09,409 INFO L225 Difference]: With dead ends: 129 [2018-09-26 21:21:09,409 INFO L226 Difference]: Without dead ends: 127 [2018-09-26 21:21:09,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-26 21:21:09,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-26 21:21:09,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-26 21:21:09,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-26 21:21:09,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-26 21:21:09,412 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-09-26 21:21:09,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:09,413 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-26 21:21:09,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-26 21:21:09,413 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-26 21:21:09,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-26 21:21:09,414 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:09,414 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-09-26 21:21:09,414 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:09,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:09,414 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-09-26 21:21:09,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:09,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:09,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:09,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:09,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:09,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:10,897 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:10,897 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 [2018-09-26 21:21:10,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:10,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:10,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:10,990 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:10,991 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-26 21:21:10,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-26 21:21:10,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-26 21:21:10,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:21:10,992 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-09-26 21:21:11,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:11,127 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-26 21:21:11,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-26 21:21:11,128 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-09-26 21:21:11,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:11,129 INFO L225 Difference]: With dead ends: 131 [2018-09-26 21:21:11,129 INFO L226 Difference]: Without dead ends: 129 [2018-09-26 21:21:11,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:21:11,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-26 21:21:11,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-26 21:21:11,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-26 21:21:11,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-26 21:21:11,131 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-09-26 21:21:11,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:11,132 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-26 21:21:11,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-26 21:21:11,132 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-26 21:21:11,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-26 21:21:11,133 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:11,133 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-09-26 21:21:11,133 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:11,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:11,134 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-09-26 21:21:11,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:11,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:11,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:11,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:11,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:12,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:12,575 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 [2018-09-26 21:21:12,582 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:12,614 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:12,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:12,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:12,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:12,672 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-26 21:21:12,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-26 21:21:12,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-26 21:21:12,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:21:12,673 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-09-26 21:21:12,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:12,772 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-26 21:21:12,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:21:12,772 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-09-26 21:21:12,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:12,773 INFO L225 Difference]: With dead ends: 133 [2018-09-26 21:21:12,773 INFO L226 Difference]: Without dead ends: 131 [2018-09-26 21:21:12,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:21:12,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-26 21:21:12,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-26 21:21:12,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-26 21:21:12,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-26 21:21:12,776 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-09-26 21:21:12,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:12,776 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-26 21:21:12,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-26 21:21:12,776 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-26 21:21:12,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-26 21:21:12,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:12,777 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-09-26 21:21:12,777 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:12,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:12,777 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-09-26 21:21:12,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:12,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:12,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:12,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:12,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:14,633 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:14,633 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:14,643 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:21:14,705 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-26 21:21:14,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:14,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:14,755 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:14,755 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-26 21:21:14,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-26 21:21:14,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-26 21:21:14,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:21:14,757 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-09-26 21:21:14,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:14,908 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-26 21:21:14,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-26 21:21:14,908 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-09-26 21:21:14,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:14,909 INFO L225 Difference]: With dead ends: 135 [2018-09-26 21:21:14,909 INFO L226 Difference]: Without dead ends: 133 [2018-09-26 21:21:14,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:21:14,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-26 21:21:14,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-26 21:21:14,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-26 21:21:14,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-26 21:21:14,913 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-09-26 21:21:14,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:14,913 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-26 21:21:14,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-26 21:21:14,914 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-26 21:21:14,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-26 21:21:14,914 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:14,914 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-09-26 21:21:14,915 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:14,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:14,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-09-26 21:21:14,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:14,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:14,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:14,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:14,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:16,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:16,506 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 [2018-09-26 21:21:16,515 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:21:16,548 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:21:16,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:16,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:16,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:16,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-26 21:21:16,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-26 21:21:16,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-26 21:21:16,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-26 21:21:16,599 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-09-26 21:21:16,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:16,717 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-26 21:21:16,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-26 21:21:16,718 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-09-26 21:21:16,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:16,719 INFO L225 Difference]: With dead ends: 137 [2018-09-26 21:21:16,719 INFO L226 Difference]: Without dead ends: 135 [2018-09-26 21:21:16,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-26 21:21:16,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-26 21:21:16,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-26 21:21:16,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-26 21:21:16,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-26 21:21:16,723 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-09-26 21:21:16,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:16,724 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-26 21:21:16,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-26 21:21:16,724 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-26 21:21:16,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-26 21:21:16,724 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:16,725 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-09-26 21:21:16,725 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:16,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:16,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-09-26 21:21:16,725 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:16,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:16,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:16,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:16,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:18,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:18,709 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:18,717 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:21:18,777 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-26 21:21:18,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:18,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:18,843 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:18,843 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-26 21:21:18,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-26 21:21:18,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-26 21:21:18,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:21:18,844 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-09-26 21:21:19,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:19,760 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-26 21:21:19,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-26 21:21:19,760 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-09-26 21:21:19,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:19,761 INFO L225 Difference]: With dead ends: 139 [2018-09-26 21:21:19,761 INFO L226 Difference]: Without dead ends: 137 [2018-09-26 21:21:19,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:21:19,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-26 21:21:19,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-26 21:21:19,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-26 21:21:19,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-26 21:21:19,766 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-09-26 21:21:19,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:19,766 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-26 21:21:19,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-26 21:21:19,766 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-26 21:21:19,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-26 21:21:19,767 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:19,767 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-09-26 21:21:19,767 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:19,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:19,768 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-09-26 21:21:19,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:19,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:19,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:19,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:19,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:21,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:21,395 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:21,395 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 [2018-09-26 21:21:21,404 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:21:21,467 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-26 21:21:21,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:21,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:21,532 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:21,532 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-26 21:21:21,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-26 21:21:21,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-26 21:21:21,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:21:21,534 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-09-26 21:21:21,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:21,693 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-26 21:21:21,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-26 21:21:21,693 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-09-26 21:21:21,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:21,694 INFO L225 Difference]: With dead ends: 141 [2018-09-26 21:21:21,694 INFO L226 Difference]: Without dead ends: 139 [2018-09-26 21:21:21,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:21:21,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-26 21:21:21,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-26 21:21:21,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-26 21:21:21,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-26 21:21:21,699 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-09-26 21:21:21,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:21,699 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-26 21:21:21,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-26 21:21:21,699 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-26 21:21:21,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-26 21:21:21,700 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:21,700 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-09-26 21:21:21,700 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:21,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:21,700 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-09-26 21:21:21,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:21,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:21,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:21,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:21,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:23,643 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:23,643 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 [2018-09-26 21:21:23,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:23,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:23,761 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:23,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-26 21:21:23,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-26 21:21:23,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-26 21:21:23,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:21:23,762 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-09-26 21:21:23,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:23,877 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-26 21:21:23,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-26 21:21:23,877 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-09-26 21:21:23,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:23,879 INFO L225 Difference]: With dead ends: 143 [2018-09-26 21:21:23,879 INFO L226 Difference]: Without dead ends: 141 [2018-09-26 21:21:23,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:21:23,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-26 21:21:23,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-26 21:21:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-26 21:21:23,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-26 21:21:23,883 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-09-26 21:21:23,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:23,883 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-26 21:21:23,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-26 21:21:23,883 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-26 21:21:23,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-26 21:21:23,884 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:23,884 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-09-26 21:21:23,884 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:23,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:23,885 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-09-26 21:21:23,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:23,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:23,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:23,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:23,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:25,660 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:25,660 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:25,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:25,704 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:25,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:25,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:25,749 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:25,749 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-26 21:21:25,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-26 21:21:25,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-26 21:21:25,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:21:25,750 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-09-26 21:21:25,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:25,867 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-26 21:21:25,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-26 21:21:25,867 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-09-26 21:21:25,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:25,868 INFO L225 Difference]: With dead ends: 145 [2018-09-26 21:21:25,868 INFO L226 Difference]: Without dead ends: 143 [2018-09-26 21:21:25,868 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 [2018-09-26 21:21:25,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-26 21:21:25,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-26 21:21:25,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-26 21:21:25,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-26 21:21:25,871 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-09-26 21:21:25,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:25,871 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-26 21:21:25,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-26 21:21:25,871 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-26 21:21:25,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-26 21:21:25,872 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:25,872 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-09-26 21:21:25,872 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:25,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:25,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-09-26 21:21:25,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:25,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:25,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:25,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:25,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:27,670 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:27,670 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 [2018-09-26 21:21:27,677 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:21:27,779 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-26 21:21:27,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:27,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:27,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:27,834 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-26 21:21:27,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-26 21:21:27,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-26 21:21:27,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:21:27,836 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-09-26 21:21:28,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:28,025 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-26 21:21:28,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-26 21:21:28,026 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-09-26 21:21:28,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:28,026 INFO L225 Difference]: With dead ends: 147 [2018-09-26 21:21:28,027 INFO L226 Difference]: Without dead ends: 145 [2018-09-26 21:21:28,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:21:28,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-26 21:21:28,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-26 21:21:28,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-26 21:21:28,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-26 21:21:28,030 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-09-26 21:21:28,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:28,031 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-26 21:21:28,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-26 21:21:28,031 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-26 21:21:28,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-26 21:21:28,032 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:28,032 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-09-26 21:21:28,032 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:28,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:28,032 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-09-26 21:21:28,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:28,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:28,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:28,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:28,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:30,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:30,225 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 [2018-09-26 21:21:30,232 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:21:30,267 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:21:30,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:30,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:30,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:30,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:30,333 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-26 21:21:30,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-26 21:21:30,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-26 21:21:30,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-26 21:21:30,334 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-09-26 21:21:30,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:30,524 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-26 21:21:30,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-26 21:21:30,524 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-09-26 21:21:30,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:30,525 INFO L225 Difference]: With dead ends: 149 [2018-09-26 21:21:30,525 INFO L226 Difference]: Without dead ends: 147 [2018-09-26 21:21:30,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-26 21:21:30,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-26 21:21:30,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-26 21:21:30,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-26 21:21:30,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-26 21:21:30,529 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-09-26 21:21:30,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:30,530 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-26 21:21:30,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-26 21:21:30,530 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-26 21:21:30,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-26 21:21:30,531 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:30,531 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-09-26 21:21:30,531 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:30,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:30,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-09-26 21:21:30,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:30,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:30,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:30,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:30,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:32,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:32,482 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 [2018-09-26 21:21:32,488 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:21:32,745 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-26 21:21:32,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:32,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:32,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:32,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-26 21:21:32,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-26 21:21:32,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-26 21:21:32,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:21:32,815 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-09-26 21:21:33,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:33,131 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-26 21:21:33,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-26 21:21:33,132 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-09-26 21:21:33,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:33,133 INFO L225 Difference]: With dead ends: 151 [2018-09-26 21:21:33,133 INFO L226 Difference]: Without dead ends: 149 [2018-09-26 21:21:33,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:21:33,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-26 21:21:33,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-26 21:21:33,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-26 21:21:33,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-26 21:21:33,137 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-09-26 21:21:33,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:33,137 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-26 21:21:33,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-26 21:21:33,137 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-26 21:21:33,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-26 21:21:33,138 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:33,138 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-09-26 21:21:33,139 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:33,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:33,139 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-09-26 21:21:33,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:33,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:33,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:33,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:33,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:35,421 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:35,421 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 [2018-09-26 21:21:35,429 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:21:35,499 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-26 21:21:35,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:35,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:35,547 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:35,547 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-26 21:21:35,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-26 21:21:35,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-26 21:21:35,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-26 21:21:35,548 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-09-26 21:21:35,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:35,692 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-26 21:21:35,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-26 21:21:35,693 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-09-26 21:21:35,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:35,694 INFO L225 Difference]: With dead ends: 153 [2018-09-26 21:21:35,695 INFO L226 Difference]: Without dead ends: 151 [2018-09-26 21:21:35,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-26 21:21:35,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-26 21:21:35,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-26 21:21:35,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-26 21:21:35,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-26 21:21:35,700 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-09-26 21:21:35,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:35,700 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-26 21:21:35,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-26 21:21:35,700 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-26 21:21:35,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-26 21:21:35,701 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:35,701 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-09-26 21:21:35,701 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:35,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:35,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-09-26 21:21:35,702 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:35,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:35,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:35,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:35,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:37,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:37,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:37,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:37,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:37,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:37,826 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:37,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-26 21:21:37,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-26 21:21:37,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-26 21:21:37,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:21:37,828 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-09-26 21:21:38,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:38,023 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-26 21:21:38,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-26 21:21:38,023 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-09-26 21:21:38,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:38,024 INFO L225 Difference]: With dead ends: 155 [2018-09-26 21:21:38,024 INFO L226 Difference]: Without dead ends: 153 [2018-09-26 21:21:38,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:21:38,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-26 21:21:38,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-26 21:21:38,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-26 21:21:38,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-09-26 21:21:38,027 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-09-26 21:21:38,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:38,027 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-09-26 21:21:38,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-26 21:21:38,027 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-09-26 21:21:38,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-26 21:21:38,028 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:38,028 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-09-26 21:21:38,028 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:38,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:38,029 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-09-26 21:21:38,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:38,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:38,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:38,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:38,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:38,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:40,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:40,479 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 [2018-09-26 21:21:40,486 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:40,526 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:40,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:40,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:40,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:40,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:40,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-26 21:21:40,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-26 21:21:40,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-26 21:21:40,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-26 21:21:40,598 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-09-26 21:21:40,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:40,809 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-26 21:21:40,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-26 21:21:40,810 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-09-26 21:21:40,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:40,810 INFO L225 Difference]: With dead ends: 157 [2018-09-26 21:21:40,811 INFO L226 Difference]: Without dead ends: 155 [2018-09-26 21:21:40,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-26 21:21:40,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-26 21:21:40,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-26 21:21:40,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-26 21:21:40,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-26 21:21:40,815 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-09-26 21:21:40,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:40,815 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-26 21:21:40,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-26 21:21:40,815 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-26 21:21:40,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-26 21:21:40,816 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:40,816 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-09-26 21:21:40,817 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:40,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:40,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-09-26 21:21:40,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:40,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:40,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:40,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:40,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:40,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:42,885 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:42,886 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 [2018-09-26 21:21:42,903 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:21:42,995 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-26 21:21:42,995 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:42,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:43,047 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:43,047 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-26 21:21:43,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-26 21:21:43,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-26 21:21:43,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:21:43,049 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-09-26 21:21:43,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:43,260 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-26 21:21:43,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-26 21:21:43,261 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-09-26 21:21:43,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:43,261 INFO L225 Difference]: With dead ends: 159 [2018-09-26 21:21:43,261 INFO L226 Difference]: Without dead ends: 157 [2018-09-26 21:21:43,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:21:43,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-26 21:21:43,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-26 21:21:43,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-26 21:21:43,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-09-26 21:21:43,264 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-09-26 21:21:43,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:43,265 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-09-26 21:21:43,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-26 21:21:43,265 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-09-26 21:21:43,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-26 21:21:43,265 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:43,265 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-09-26 21:21:43,266 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:43,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:43,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-09-26 21:21:43,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:43,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:43,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:43,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:43,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:45,682 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:45,682 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 [2018-09-26 21:21:45,689 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:21:45,729 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:21:45,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:45,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:45,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:45,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:45,779 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-26 21:21:45,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-26 21:21:45,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-26 21:21:45,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-26 21:21:45,780 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-09-26 21:21:45,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:45,996 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-26 21:21:45,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-26 21:21:45,996 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-09-26 21:21:45,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:45,997 INFO L225 Difference]: With dead ends: 161 [2018-09-26 21:21:45,997 INFO L226 Difference]: Without dead ends: 159 [2018-09-26 21:21:45,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-26 21:21:45,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-26 21:21:46,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-26 21:21:46,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-26 21:21:46,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-09-26 21:21:46,000 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-09-26 21:21:46,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:46,001 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-09-26 21:21:46,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-26 21:21:46,001 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-09-26 21:21:46,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-26 21:21:46,001 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:46,001 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-09-26 21:21:46,002 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:46,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:46,002 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-09-26 21:21:46,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:46,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:46,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:46,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:46,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:46,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:48,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:48,176 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 [2018-09-26 21:21:48,184 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:21:48,259 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-26 21:21:48,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:48,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:48,319 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:48,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-26 21:21:48,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-26 21:21:48,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-26 21:21:48,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-26 21:21:48,321 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-09-26 21:21:48,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:48,875 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-26 21:21:48,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-26 21:21:48,875 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-09-26 21:21:48,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:48,876 INFO L225 Difference]: With dead ends: 163 [2018-09-26 21:21:48,876 INFO L226 Difference]: Without dead ends: 161 [2018-09-26 21:21:48,877 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 [2018-09-26 21:21:48,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-26 21:21:48,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-26 21:21:48,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-26 21:21:48,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-09-26 21:21:48,881 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-09-26 21:21:48,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:48,881 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-09-26 21:21:48,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-26 21:21:48,881 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-09-26 21:21:48,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-26 21:21:48,882 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:48,882 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-09-26 21:21:48,882 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:48,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:48,883 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-09-26 21:21:48,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:48,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:48,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:48,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:48,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:52,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:52,230 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 [2018-09-26 21:21:52,238 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:21:52,336 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-26 21:21:52,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:52,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:52,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:52,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:52,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-26 21:21:52,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-26 21:21:52,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-26 21:21:52,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-26 21:21:52,397 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-09-26 21:21:52,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:52,557 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-26 21:21:52,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-26 21:21:52,557 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-09-26 21:21:52,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:52,558 INFO L225 Difference]: With dead ends: 165 [2018-09-26 21:21:52,558 INFO L226 Difference]: Without dead ends: 163 [2018-09-26 21:21:52,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-26 21:21:52,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-26 21:21:52,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-26 21:21:52,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-26 21:21:52,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-09-26 21:21:52,562 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-09-26 21:21:52,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:52,562 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-09-26 21:21:52,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-26 21:21:52,563 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-09-26 21:21:52,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-26 21:21:52,563 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:52,564 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-09-26 21:21:52,564 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:52,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:52,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-09-26 21:21:52,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:52,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:52,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:52,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:52,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:55,213 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:55,213 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 [2018-09-26 21:21:55,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:55,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:55,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:55,311 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:55,311 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-26 21:21:55,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-26 21:21:55,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-26 21:21:55,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-26 21:21:55,312 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-09-26 21:21:55,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:55,554 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-26 21:21:55,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-26 21:21:55,554 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-09-26 21:21:55,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:55,555 INFO L225 Difference]: With dead ends: 167 [2018-09-26 21:21:55,555 INFO L226 Difference]: Without dead ends: 165 [2018-09-26 21:21:55,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-26 21:21:55,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-26 21:21:55,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-26 21:21:55,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-26 21:21:55,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-09-26 21:21:55,558 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-09-26 21:21:55,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:55,559 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-09-26 21:21:55,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-26 21:21:55,559 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-09-26 21:21:55,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-26 21:21:55,559 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:55,560 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-09-26 21:21:55,560 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:55,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:55,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-09-26 21:21:55,560 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:55,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:55,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:55,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:55,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:57,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:57,983 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 [2018-09-26 21:21:57,990 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:58,031 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:58,032 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:58,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:58,087 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:58,087 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-26 21:21:58,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-26 21:21:58,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-26 21:21:58,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-26 21:21:58,088 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-09-26 21:21:58,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:58,236 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-26 21:21:58,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-26 21:21:58,236 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-09-26 21:21:58,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:58,237 INFO L225 Difference]: With dead ends: 169 [2018-09-26 21:21:58,237 INFO L226 Difference]: Without dead ends: 167 [2018-09-26 21:21:58,237 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 [2018-09-26 21:21:58,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-26 21:21:58,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-26 21:21:58,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-26 21:21:58,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-09-26 21:21:58,240 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-09-26 21:21:58,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:58,241 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-09-26 21:21:58,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-26 21:21:58,241 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-09-26 21:21:58,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-26 21:21:58,241 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:58,241 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-09-26 21:21:58,242 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:58,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:58,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-09-26 21:21:58,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:58,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:58,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:58,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:58,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:01,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:01,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:22:01,025 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:22:01,119 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-26 21:22:01,119 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:01,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:01,170 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:01,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-26 21:22:01,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-26 21:22:01,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-26 21:22:01,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-26 21:22:01,172 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-09-26 21:22:01,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:01,348 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-09-26 21:22:01,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-26 21:22:01,348 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-09-26 21:22:01,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:01,350 INFO L225 Difference]: With dead ends: 171 [2018-09-26 21:22:01,350 INFO L226 Difference]: Without dead ends: 169 [2018-09-26 21:22:01,350 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 [2018-09-26 21:22:01,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-26 21:22:01,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-26 21:22:01,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-26 21:22:01,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-09-26 21:22:01,354 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-09-26 21:22:01,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:01,354 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-09-26 21:22:01,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-26 21:22:01,354 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-09-26 21:22:01,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-26 21:22:01,355 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:01,355 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-09-26 21:22:01,355 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:01,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:01,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-09-26 21:22:01,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:01,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:01,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:01,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:01,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:03,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:03,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:03,783 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 [2018-09-26 21:22:03,791 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:22:03,834 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:22:03,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:03,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:03,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:03,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-26 21:22:03,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-26 21:22:03,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-26 21:22:03,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-26 21:22:03,888 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-09-26 21:22:04,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:04,143 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-09-26 21:22:04,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-26 21:22:04,143 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-09-26 21:22:04,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:04,144 INFO L225 Difference]: With dead ends: 173 [2018-09-26 21:22:04,144 INFO L226 Difference]: Without dead ends: 171 [2018-09-26 21:22:04,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-26 21:22:04,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-26 21:22:04,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-26 21:22:04,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-26 21:22:04,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-09-26 21:22:04,147 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-09-26 21:22:04,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:04,147 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-09-26 21:22:04,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-26 21:22:04,148 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-09-26 21:22:04,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-26 21:22:04,148 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:04,148 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-09-26 21:22:04,148 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:04,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:04,149 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-09-26 21:22:04,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:04,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:04,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:04,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:04,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:06,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:06,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:22:06,941 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:22:07,026 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-26 21:22:07,026 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:07,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:07,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:07,083 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:07,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-26 21:22:07,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-26 21:22:07,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-26 21:22:07,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-26 21:22:07,085 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-09-26 21:22:07,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:07,366 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-09-26 21:22:07,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-26 21:22:07,367 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-09-26 21:22:07,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:07,368 INFO L225 Difference]: With dead ends: 175 [2018-09-26 21:22:07,368 INFO L226 Difference]: Without dead ends: 173 [2018-09-26 21:22:07,368 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 [2018-09-26 21:22:07,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-26 21:22:07,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-26 21:22:07,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-26 21:22:07,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-09-26 21:22:07,372 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-09-26 21:22:07,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:07,372 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-09-26 21:22:07,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-26 21:22:07,373 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-09-26 21:22:07,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-26 21:22:07,373 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:07,374 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-09-26 21:22:07,374 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:07,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:07,374 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-09-26 21:22:07,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:07,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:07,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:07,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:07,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:07,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:10,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:10,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:10,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:22:10,351 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:22:10,438 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-26 21:22:10,438 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:10,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:10,516 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:10,516 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-26 21:22:10,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-26 21:22:10,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-26 21:22:10,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-26 21:22:10,518 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-09-26 21:22:10,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:10,988 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-09-26 21:22:10,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-26 21:22:10,988 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-09-26 21:22:10,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:10,989 INFO L225 Difference]: With dead ends: 177 [2018-09-26 21:22:10,989 INFO L226 Difference]: Without dead ends: 175 [2018-09-26 21:22:10,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-26 21:22:10,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-26 21:22:10,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-26 21:22:10,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-26 21:22:10,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-09-26 21:22:10,993 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-09-26 21:22:10,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:10,993 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-09-26 21:22:10,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-26 21:22:10,993 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-09-26 21:22:10,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-26 21:22:10,994 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:10,994 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-09-26 21:22:10,995 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:10,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:10,995 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-09-26 21:22:10,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:10,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:10,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:10,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:10,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:13,647 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:13,647 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 [2018-09-26 21:22:13,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:13,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:13,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:13,751 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:13,752 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-26 21:22:13,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-26 21:22:13,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-26 21:22:13,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-26 21:22:13,753 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-09-26 21:22:14,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:14,030 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-09-26 21:22:14,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-26 21:22:14,031 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-09-26 21:22:14,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:14,032 INFO L225 Difference]: With dead ends: 179 [2018-09-26 21:22:14,032 INFO L226 Difference]: Without dead ends: 177 [2018-09-26 21:22:14,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-26 21:22:14,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-26 21:22:14,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-26 21:22:14,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-26 21:22:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-09-26 21:22:14,035 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-09-26 21:22:14,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:14,035 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-09-26 21:22:14,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-26 21:22:14,036 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-09-26 21:22:14,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-26 21:22:14,036 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:14,037 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-09-26 21:22:14,037 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:14,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:14,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-09-26 21:22:14,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:14,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:14,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:14,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:14,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:17,014 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:17,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:22:17,021 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:22:17,064 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:22:17,064 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:17,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:17,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:17,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-26 21:22:17,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-26 21:22:17,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-26 21:22:17,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-26 21:22:17,129 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-09-26 21:22:17,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:17,300 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-09-26 21:22:17,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-26 21:22:17,301 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-09-26 21:22:17,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:17,302 INFO L225 Difference]: With dead ends: 181 [2018-09-26 21:22:17,302 INFO L226 Difference]: Without dead ends: 179 [2018-09-26 21:22:17,303 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 [2018-09-26 21:22:17,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-26 21:22:17,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-26 21:22:17,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-26 21:22:17,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-09-26 21:22:17,306 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-09-26 21:22:17,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:17,306 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-09-26 21:22:17,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-26 21:22:17,306 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-09-26 21:22:17,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-26 21:22:17,307 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:17,307 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-09-26 21:22:17,307 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:17,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:17,307 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-09-26 21:22:17,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:17,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:17,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:17,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:17,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:20,407 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:20,407 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 [2018-09-26 21:22:20,415 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:22:20,517 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-26 21:22:20,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:20,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:20,579 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:20,579 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-26 21:22:20,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-26 21:22:20,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-26 21:22:20,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-26 21:22:20,581 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-09-26 21:22:20,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:20,869 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-09-26 21:22:20,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-26 21:22:20,869 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-09-26 21:22:20,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:20,870 INFO L225 Difference]: With dead ends: 183 [2018-09-26 21:22:20,870 INFO L226 Difference]: Without dead ends: 181 [2018-09-26 21:22:20,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-26 21:22:20,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-26 21:22:20,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-26 21:22:20,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-26 21:22:20,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-09-26 21:22:20,873 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-09-26 21:22:20,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:20,874 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-09-26 21:22:20,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-26 21:22:20,874 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-09-26 21:22:20,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-26 21:22:20,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:20,874 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-09-26 21:22:20,875 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:20,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:20,875 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-09-26 21:22:20,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:20,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:20,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:20,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:20,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:23,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:23,686 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:23,686 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 [2018-09-26 21:22:23,693 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:22:23,740 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:22:23,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:23,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:23,798 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:23,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-26 21:22:23,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-26 21:22:23,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-26 21:22:23,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-26 21:22:23,800 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-09-26 21:22:24,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:24,004 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-09-26 21:22:24,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-26 21:22:24,004 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-09-26 21:22:24,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:24,006 INFO L225 Difference]: With dead ends: 185 [2018-09-26 21:22:24,006 INFO L226 Difference]: Without dead ends: 183 [2018-09-26 21:22:24,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-26 21:22:24,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-26 21:22:24,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-26 21:22:24,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-26 21:22:24,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-09-26 21:22:24,011 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-09-26 21:22:24,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:24,011 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-09-26 21:22:24,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-26 21:22:24,011 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-09-26 21:22:24,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-26 21:22:24,012 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:24,012 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-09-26 21:22:24,012 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:24,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:24,012 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-09-26 21:22:24,012 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:24,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:24,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:24,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:24,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:27,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:27,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:27,199 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 [2018-09-26 21:22:27,208 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:22:27,300 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-09-26 21:22:27,300 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:27,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:27,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:27,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:27,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-26 21:22:27,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-26 21:22:27,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-26 21:22:27,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-26 21:22:27,361 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-09-26 21:22:27,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:27,680 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-09-26 21:22:27,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-26 21:22:27,680 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-09-26 21:22:27,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:27,681 INFO L225 Difference]: With dead ends: 187 [2018-09-26 21:22:27,681 INFO L226 Difference]: Without dead ends: 185 [2018-09-26 21:22:27,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-26 21:22:27,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-26 21:22:27,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-26 21:22:27,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-26 21:22:27,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-09-26 21:22:27,684 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-09-26 21:22:27,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:27,684 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-09-26 21:22:27,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-26 21:22:27,685 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-09-26 21:22:27,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-26 21:22:27,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:27,686 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-09-26 21:22:27,686 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:27,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:27,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-09-26 21:22:27,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:27,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:27,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:27,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:27,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:30,872 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:30,873 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 [2018-09-26 21:22:30,880 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:22:30,974 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-09-26 21:22:30,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:30,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:31,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:31,030 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:31,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-26 21:22:31,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-26 21:22:31,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-26 21:22:31,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-26 21:22:31,032 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-09-26 21:22:31,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:31,262 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-09-26 21:22:31,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-26 21:22:31,263 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-09-26 21:22:31,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:31,263 INFO L225 Difference]: With dead ends: 189 [2018-09-26 21:22:31,263 INFO L226 Difference]: Without dead ends: 187 [2018-09-26 21:22:31,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-26 21:22:31,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-26 21:22:31,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-26 21:22:31,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-26 21:22:31,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-09-26 21:22:31,268 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-09-26 21:22:31,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:31,269 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-09-26 21:22:31,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-26 21:22:31,269 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-09-26 21:22:31,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-26 21:22:31,270 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:31,270 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-09-26 21:22:31,270 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:31,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:31,270 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-09-26 21:22:31,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:31,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:31,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:31,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:31,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:34,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:34,286 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:34,286 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 [2018-09-26 21:22:34,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:34,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:34,409 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:34,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-26 21:22:34,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-26 21:22:34,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-26 21:22:34,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-26 21:22:34,410 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-09-26 21:22:34,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:34,604 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-09-26 21:22:34,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-26 21:22:34,604 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-09-26 21:22:34,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:34,605 INFO L225 Difference]: With dead ends: 191 [2018-09-26 21:22:34,605 INFO L226 Difference]: Without dead ends: 189 [2018-09-26 21:22:34,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-26 21:22:34,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-26 21:22:34,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-26 21:22:34,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-26 21:22:34,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-09-26 21:22:34,609 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-09-26 21:22:34,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:34,610 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-09-26 21:22:34,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-26 21:22:34,610 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-09-26 21:22:34,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-26 21:22:34,611 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:34,611 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-09-26 21:22:34,611 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:34,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:34,611 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-09-26 21:22:34,612 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:34,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:34,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:34,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:34,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:37,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:37,947 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 [2018-09-26 21:22:37,955 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:22:38,000 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:22:38,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:38,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:38,057 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:38,057 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-26 21:22:38,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-26 21:22:38,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-26 21:22:38,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-26 21:22:38,059 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-09-26 21:22:38,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:38,225 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-09-26 21:22:38,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-26 21:22:38,226 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-09-26 21:22:38,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:38,227 INFO L225 Difference]: With dead ends: 193 [2018-09-26 21:22:38,227 INFO L226 Difference]: Without dead ends: 191 [2018-09-26 21:22:38,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-26 21:22:38,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-26 21:22:38,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-26 21:22:38,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-26 21:22:38,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-09-26 21:22:38,232 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-09-26 21:22:38,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:38,232 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-09-26 21:22:38,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-26 21:22:38,232 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-09-26 21:22:38,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-26 21:22:38,233 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:38,233 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-09-26 21:22:38,233 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:38,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:38,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-09-26 21:22:38,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:38,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:38,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:38,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:38,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:42,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:42,251 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 [2018-09-26 21:22:42,258 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:22:42,364 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-09-26 21:22:42,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:42,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:42,422 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:42,422 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-26 21:22:42,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-26 21:22:42,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-26 21:22:42,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-26 21:22:42,424 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-09-26 21:22:42,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:42,611 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-09-26 21:22:42,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-26 21:22:42,611 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-09-26 21:22:42,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:42,612 INFO L225 Difference]: With dead ends: 195 [2018-09-26 21:22:42,612 INFO L226 Difference]: Without dead ends: 193 [2018-09-26 21:22:42,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-26 21:22:42,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-26 21:22:42,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-26 21:22:42,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-26 21:22:42,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-09-26 21:22:42,616 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-09-26 21:22:42,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:42,616 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-09-26 21:22:42,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-26 21:22:42,616 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-09-26 21:22:42,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-26 21:22:42,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:42,617 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-09-26 21:22:42,617 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:42,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:42,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-09-26 21:22:42,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:42,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:42,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:42,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:42,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:46,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:46,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:46,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:22:46,132 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:22:46,181 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:22:46,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:46,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:46,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:46,259 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:46,259 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-26 21:22:46,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-26 21:22:46,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-26 21:22:46,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-26 21:22:46,261 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-09-26 21:22:46,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:46,558 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-09-26 21:22:46,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-26 21:22:46,559 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-09-26 21:22:46,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:46,560 INFO L225 Difference]: With dead ends: 197 [2018-09-26 21:22:46,560 INFO L226 Difference]: Without dead ends: 195 [2018-09-26 21:22:46,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-26 21:22:46,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-26 21:22:46,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-26 21:22:46,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-26 21:22:46,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-09-26 21:22:46,564 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-09-26 21:22:46,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:46,564 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-09-26 21:22:46,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-26 21:22:46,564 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-09-26 21:22:46,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-26 21:22:46,565 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:46,565 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-09-26 21:22:46,565 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:46,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:46,565 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-09-26 21:22:46,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:46,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:46,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:46,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:46,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:49,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:49,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:49,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:22:49,841 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:22:49,953 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-09-26 21:22:49,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:49,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:49,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:50,014 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:50,014 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-26 21:22:50,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-26 21:22:50,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-26 21:22:50,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-26 21:22:50,016 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-09-26 21:22:50,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:50,329 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-09-26 21:22:50,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-26 21:22:50,329 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-09-26 21:22:50,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:50,330 INFO L225 Difference]: With dead ends: 199 [2018-09-26 21:22:50,330 INFO L226 Difference]: Without dead ends: 197 [2018-09-26 21:22:50,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-26 21:22:50,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-26 21:22:50,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-26 21:22:50,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-26 21:22:50,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-09-26 21:22:50,335 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-09-26 21:22:50,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:50,336 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-09-26 21:22:50,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-26 21:22:50,336 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-09-26 21:22:50,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-26 21:22:50,337 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:50,337 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-09-26 21:22:50,337 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:50,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:50,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-09-26 21:22:50,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:50,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:50,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:50,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:50,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:53,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:53,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:22:53,892 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:22:54,001 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-09-26 21:22:54,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:54,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:54,059 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:54,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-26 21:22:54,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-26 21:22:54,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-26 21:22:54,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-26 21:22:54,060 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2018-09-26 21:22:54,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:54,260 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-09-26 21:22:54,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-26 21:22:54,260 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2018-09-26 21:22:54,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:54,261 INFO L225 Difference]: With dead ends: 201 [2018-09-26 21:22:54,261 INFO L226 Difference]: Without dead ends: 199 [2018-09-26 21:22:54,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-26 21:22:54,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-26 21:22:54,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-26 21:22:54,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-26 21:22:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-09-26 21:22:54,265 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2018-09-26 21:22:54,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:54,265 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-09-26 21:22:54,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-26 21:22:54,265 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-09-26 21:22:54,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-26 21:22:54,266 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:54,266 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-09-26 21:22:54,266 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:54,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:54,266 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 97 times [2018-09-26 21:22:54,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:54,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:54,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:54,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:54,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:57,953 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:57,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:22:57,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:58,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:58,083 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:58,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-26 21:22:58,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-26 21:22:58,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-26 21:22:58,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-26 21:22:58,084 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 100 states. [2018-09-26 21:22:58,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:58,401 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-09-26 21:22:58,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-26 21:22:58,401 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-09-26 21:22:58,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:58,402 INFO L225 Difference]: With dead ends: 203 [2018-09-26 21:22:58,402 INFO L226 Difference]: Without dead ends: 201 [2018-09-26 21:22:58,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-26 21:22:58,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-26 21:22:58,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-26 21:22:58,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-26 21:22:58,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-09-26 21:22:58,405 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2018-09-26 21:22:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:58,405 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-09-26 21:22:58,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-26 21:22:58,406 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-09-26 21:22:58,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-26 21:22:58,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:58,406 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1] [2018-09-26 21:22:58,407 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:58,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:58,407 INFO L82 PathProgramCache]: Analyzing trace with hash 925303419, now seen corresponding path program 98 times [2018-09-26 21:22:58,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:58,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:58,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:58,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:58,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:58,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:02,181 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:02,181 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:02,187 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:23:02,238 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:23:02,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:02,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:02,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:02,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-26 21:23:02,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-26 21:23:02,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-26 21:23:02,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-26 21:23:02,302 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 101 states. [2018-09-26 21:23:02,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:02,596 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-09-26 21:23:02,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-26 21:23:02,596 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 200 [2018-09-26 21:23:02,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:02,597 INFO L225 Difference]: With dead ends: 205 [2018-09-26 21:23:02,597 INFO L226 Difference]: Without dead ends: 203 [2018-09-26 21:23:02,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-26 21:23:02,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-26 21:23:02,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-26 21:23:02,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-26 21:23:02,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-09-26 21:23:02,600 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2018-09-26 21:23:02,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:02,601 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-09-26 21:23:02,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-26 21:23:02,601 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-09-26 21:23:02,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-26 21:23:02,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:02,601 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1] [2018-09-26 21:23:02,602 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:02,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:02,602 INFO L82 PathProgramCache]: Analyzing trace with hash 158407477, now seen corresponding path program 99 times [2018-09-26 21:23:02,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:02,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:02,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:02,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:02,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:06,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:06,567 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:06,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:06,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:23:06,701 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-09-26 21:23:06,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:06,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:06,764 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:06,765 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-26 21:23:06,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-26 21:23:06,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-26 21:23:06,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-26 21:23:06,766 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 102 states. [2018-09-26 21:23:07,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:07,017 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-09-26 21:23:07,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-26 21:23:07,017 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-09-26 21:23:07,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:07,018 INFO L225 Difference]: With dead ends: 207 [2018-09-26 21:23:07,018 INFO L226 Difference]: Without dead ends: 205 [2018-09-26 21:23:07,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-26 21:23:07,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-26 21:23:07,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-26 21:23:07,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-26 21:23:07,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2018-09-26 21:23:07,023 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2018-09-26 21:23:07,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:07,023 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2018-09-26 21:23:07,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-26 21:23:07,023 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2018-09-26 21:23:07,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-26 21:23:07,024 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:07,024 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1] [2018-09-26 21:23:07,024 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:07,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:07,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1905782127, now seen corresponding path program 100 times [2018-09-26 21:23:07,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:07,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:07,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:07,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:07,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:10,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:10,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:10,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:10,710 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:23:10,759 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:23:10,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:10,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:10,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:10,833 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:10,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-26 21:23:10,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-26 21:23:10,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-26 21:23:10,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-26 21:23:10,835 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 103 states. [2018-09-26 21:23:11,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:11,113 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-09-26 21:23:11,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-26 21:23:11,113 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 204 [2018-09-26 21:23:11,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:11,114 INFO L225 Difference]: With dead ends: 209 [2018-09-26 21:23:11,114 INFO L226 Difference]: Without dead ends: 207 [2018-09-26 21:23:11,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-26 21:23:11,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-26 21:23:11,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-26 21:23:11,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-26 21:23:11,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-09-26 21:23:11,118 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2018-09-26 21:23:11,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:11,119 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-09-26 21:23:11,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-26 21:23:11,119 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-09-26 21:23:11,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-26 21:23:11,120 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:11,120 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1] [2018-09-26 21:23:11,120 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:11,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:11,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1800608041, now seen corresponding path program 101 times [2018-09-26 21:23:11,121 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:11,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:11,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:11,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:11,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:14,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:14,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:14,810 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:23:15,057 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-09-26 21:23:15,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:15,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:15,140 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:15,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-26 21:23:15,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-26 21:23:15,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-26 21:23:15,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-26 21:23:15,144 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 104 states. [2018-09-26 21:23:15,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:15,394 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-09-26 21:23:15,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-26 21:23:15,395 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 206 [2018-09-26 21:23:15,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:15,396 INFO L225 Difference]: With dead ends: 211 [2018-09-26 21:23:15,396 INFO L226 Difference]: Without dead ends: 209 [2018-09-26 21:23:15,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-26 21:23:15,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-26 21:23:15,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-26 21:23:15,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-26 21:23:15,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-09-26 21:23:15,399 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2018-09-26 21:23:15,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:15,400 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-09-26 21:23:15,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-26 21:23:15,400 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-09-26 21:23:15,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-26 21:23:15,400 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:15,401 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1] [2018-09-26 21:23:15,401 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:15,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:15,401 INFO L82 PathProgramCache]: Analyzing trace with hash -487440797, now seen corresponding path program 102 times [2018-09-26 21:23:15,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:15,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:15,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:15,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:15,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:19,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:19,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:19,421 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:23:19,534 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-09-26 21:23:19,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:19,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:19,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:19,598 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-26 21:23:19,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-26 21:23:19,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-26 21:23:19,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-26 21:23:19,599 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 105 states. [2018-09-26 21:23:19,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:19,887 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-09-26 21:23:19,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-26 21:23:19,887 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 208 [2018-09-26 21:23:19,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:19,888 INFO L225 Difference]: With dead ends: 213 [2018-09-26 21:23:19,888 INFO L226 Difference]: Without dead ends: 211 [2018-09-26 21:23:19,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-26 21:23:19,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-26 21:23:19,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-26 21:23:19,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-26 21:23:19,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-09-26 21:23:19,892 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2018-09-26 21:23:19,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:19,892 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-09-26 21:23:19,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-26 21:23:19,893 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-09-26 21:23:19,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-26 21:23:19,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:19,894 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1] [2018-09-26 21:23:19,894 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:19,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:19,894 INFO L82 PathProgramCache]: Analyzing trace with hash -279118563, now seen corresponding path program 103 times [2018-09-26 21:23:19,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:19,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:19,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:19,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:19,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:24,024 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:24,024 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:24,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:23:24,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:24,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:24,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:24,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-26 21:23:24,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-26 21:23:24,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-26 21:23:24,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-26 21:23:24,150 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 106 states. [2018-09-26 21:23:24,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:24,526 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-09-26 21:23:24,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-26 21:23:24,526 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 210 [2018-09-26 21:23:24,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:24,526 INFO L225 Difference]: With dead ends: 215 [2018-09-26 21:23:24,527 INFO L226 Difference]: Without dead ends: 213 [2018-09-26 21:23:24,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-26 21:23:24,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-26 21:23:24,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-09-26 21:23:24,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-09-26 21:23:24,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-09-26 21:23:24,531 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2018-09-26 21:23:24,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:24,531 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-09-26 21:23:24,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-26 21:23:24,531 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-09-26 21:23:24,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-26 21:23:24,532 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:24,532 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 1, 1, 1] [2018-09-26 21:23:24,532 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:24,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:24,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1944914601, now seen corresponding path program 104 times [2018-09-26 21:23:24,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:24,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:24,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:24,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:23:24,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:28,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:28,690 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:28,697 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:23:28,746 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:23:28,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:28,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:28,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:28,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-26 21:23:28,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-26 21:23:28,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-26 21:23:28,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-26 21:23:28,837 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 107 states. [2018-09-26 21:23:29,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:29,160 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-09-26 21:23:29,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-26 21:23:29,160 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 212 [2018-09-26 21:23:29,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:29,161 INFO L225 Difference]: With dead ends: 217 [2018-09-26 21:23:29,162 INFO L226 Difference]: Without dead ends: 215 [2018-09-26 21:23:29,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-26 21:23:29,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-26 21:23:29,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-09-26 21:23:29,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-26 21:23:29,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-09-26 21:23:29,167 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2018-09-26 21:23:29,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:29,167 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-09-26 21:23:29,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-26 21:23:29,167 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-09-26 21:23:29,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-26 21:23:29,168 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:29,169 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 1, 1, 1] [2018-09-26 21:23:29,169 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:29,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:29,169 INFO L82 PathProgramCache]: Analyzing trace with hash -752105711, now seen corresponding path program 105 times [2018-09-26 21:23:29,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:29,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:29,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:29,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:29,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:33,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:33,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:33,349 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:33,357 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:23:33,487 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-09-26 21:23:33,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:33,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:33,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:33,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-26 21:23:33,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-26 21:23:33,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-26 21:23:33,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-26 21:23:33,556 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 108 states. [2018-09-26 21:23:33,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:33,916 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2018-09-26 21:23:33,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-26 21:23:33,916 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 214 [2018-09-26 21:23:33,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:33,917 INFO L225 Difference]: With dead ends: 219 [2018-09-26 21:23:33,917 INFO L226 Difference]: Without dead ends: 217 [2018-09-26 21:23:33,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-26 21:23:33,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-09-26 21:23:33,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-09-26 21:23:33,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-09-26 21:23:33,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2018-09-26 21:23:33,920 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 214 [2018-09-26 21:23:33,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:33,920 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2018-09-26 21:23:33,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-26 21:23:33,920 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2018-09-26 21:23:33,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-09-26 21:23:33,921 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:33,921 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 1, 1, 1] [2018-09-26 21:23:33,922 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:33,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:33,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1219030453, now seen corresponding path program 106 times [2018-09-26 21:23:33,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:33,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:33,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:33,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:33,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:38,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:38,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:38,407 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:23:38,460 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:23:38,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:38,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:38,518 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:38,538 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:38,538 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-26 21:23:38,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-26 21:23:38,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-26 21:23:38,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-26 21:23:38,539 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 109 states. [2018-09-26 21:23:38,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:38,838 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-09-26 21:23:38,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-26 21:23:38,839 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 216 [2018-09-26 21:23:38,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:38,839 INFO L225 Difference]: With dead ends: 221 [2018-09-26 21:23:38,839 INFO L226 Difference]: Without dead ends: 219 [2018-09-26 21:23:38,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-26 21:23:38,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-26 21:23:38,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-09-26 21:23:38,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-26 21:23:38,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-09-26 21:23:38,843 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 216 [2018-09-26 21:23:38,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:38,844 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-09-26 21:23:38,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-26 21:23:38,844 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-09-26 21:23:38,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-26 21:23:38,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:38,845 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 1, 1, 1] [2018-09-26 21:23:38,845 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:38,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:38,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1037858565, now seen corresponding path program 107 times [2018-09-26 21:23:38,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:38,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:38,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:38,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:38,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:43,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:43,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:43,207 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:23:43,330 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) [2018-09-26 21:23:43,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:43,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:43,397 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:43,397 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-26 21:23:43,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-26 21:23:43,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-26 21:23:43,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-26 21:23:43,399 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 110 states. [2018-09-26 21:23:43,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:43,731 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-09-26 21:23:43,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-26 21:23:43,731 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 218 [2018-09-26 21:23:43,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:43,732 INFO L225 Difference]: With dead ends: 223 [2018-09-26 21:23:43,732 INFO L226 Difference]: Without dead ends: 221 [2018-09-26 21:23:43,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-26 21:23:43,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-26 21:23:43,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-09-26 21:23:43,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-26 21:23:43,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2018-09-26 21:23:43,738 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 218 [2018-09-26 21:23:43,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:43,738 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2018-09-26 21:23:43,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-26 21:23:43,738 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2018-09-26 21:23:43,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-26 21:23:43,739 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:43,739 INFO L375 BasicCegarLoop]: trace histogram [109, 108, 1, 1, 1] [2018-09-26 21:23:43,739 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:43,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:43,740 INFO L82 PathProgramCache]: Analyzing trace with hash 949720383, now seen corresponding path program 108 times [2018-09-26 21:23:43,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:43,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:43,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:43,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:43,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:48,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:48,180 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:48,180 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:48,200 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:23:48,327 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 109 check-sat command(s) [2018-09-26 21:23:48,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:48,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:48,375 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:48,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:48,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-26 21:23:48,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-26 21:23:48,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-26 21:23:48,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-26 21:23:48,397 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 111 states. [2018-09-26 21:23:48,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:48,825 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-09-26 21:23:48,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-26 21:23:48,825 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 220 [2018-09-26 21:23:48,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:48,826 INFO L225 Difference]: With dead ends: 225 [2018-09-26 21:23:48,826 INFO L226 Difference]: Without dead ends: 223 [2018-09-26 21:23:48,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-26 21:23:48,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-26 21:23:48,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-09-26 21:23:48,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-26 21:23:48,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-09-26 21:23:48,829 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 220 [2018-09-26 21:23:48,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:48,830 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-09-26 21:23:48,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-26 21:23:48,830 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-09-26 21:23:48,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-26 21:23:48,831 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:48,831 INFO L375 BasicCegarLoop]: trace histogram [110, 109, 1, 1, 1] [2018-09-26 21:23:48,831 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:48,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:48,831 INFO L82 PathProgramCache]: Analyzing trace with hash -2146693895, now seen corresponding path program 109 times [2018-09-26 21:23:48,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:48,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:48,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:48,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:48,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:53,304 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:53,304 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:53,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:23:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:53,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:53,431 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:53,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-26 21:23:53,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-26 21:23:53,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-26 21:23:53,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-26 21:23:53,433 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 112 states. [2018-09-26 21:23:53,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:53,864 INFO L93 Difference]: Finished difference Result 227 states and 227 transitions. [2018-09-26 21:23:53,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-26 21:23:53,864 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 222 [2018-09-26 21:23:53,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:53,865 INFO L225 Difference]: With dead ends: 227 [2018-09-26 21:23:53,865 INFO L226 Difference]: Without dead ends: 225 [2018-09-26 21:23:53,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-26 21:23:53,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-09-26 21:23:53,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-09-26 21:23:53,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-09-26 21:23:53,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2018-09-26 21:23:53,869 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 222 [2018-09-26 21:23:53,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:53,870 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2018-09-26 21:23:53,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-26 21:23:53,870 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2018-09-26 21:23:53,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-26 21:23:53,870 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:53,871 INFO L375 BasicCegarLoop]: trace histogram [111, 110, 1, 1, 1] [2018-09-26 21:23:53,871 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:53,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:53,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1388478925, now seen corresponding path program 110 times [2018-09-26 21:23:53,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:53,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:53,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:53,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:23:53,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:58,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:58,513 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:58,513 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:58,520 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:23:58,576 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:23:58,576 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:58,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:58,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:58,644 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-26 21:23:58,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-26 21:23:58,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-26 21:23:58,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-26 21:23:58,645 INFO L87 Difference]: Start difference. First operand 225 states and 225 transitions. Second operand 113 states. [2018-09-26 21:23:59,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:59,079 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-09-26 21:23:59,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-26 21:23:59,079 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 224 [2018-09-26 21:23:59,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:59,080 INFO L225 Difference]: With dead ends: 229 [2018-09-26 21:23:59,080 INFO L226 Difference]: Without dead ends: 227 [2018-09-26 21:23:59,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-26 21:23:59,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-09-26 21:23:59,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-09-26 21:23:59,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-26 21:23:59,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-09-26 21:23:59,083 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 224 [2018-09-26 21:23:59,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:59,083 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-09-26 21:23:59,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-26 21:23:59,083 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-09-26 21:23:59,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-09-26 21:23:59,084 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:59,084 INFO L375 BasicCegarLoop]: trace histogram [112, 111, 1, 1, 1] [2018-09-26 21:23:59,084 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:59,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:59,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1406634221, now seen corresponding path program 111 times [2018-09-26 21:23:59,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:59,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:59,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:59,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:59,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-26 21:24:03,128 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:24:03,132 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:24:03,132 INFO L202 PluginConnector]: Adding new model count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:24:03 BoogieIcfgContainer [2018-09-26 21:24:03,132 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:24:03,133 INFO L168 Benchmark]: Toolchain (without parser) took 236057.22 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -133.2 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 153.9 MB). Peak memory consumption was 474.9 MB. Max. memory is 7.1 GB. [2018-09-26 21:24:03,134 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.24 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. [2018-09-26 21:24:03,134 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.66 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:24:03,134 INFO L168 Benchmark]: Boogie Preprocessor took 25.35 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. [2018-09-26 21:24:03,135 INFO L168 Benchmark]: RCFGBuilder took 274.17 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:24:03,135 INFO L168 Benchmark]: TraceAbstraction took 235707.91 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -133.2 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 132.7 MB). Peak memory consumption was 453.7 MB. Max. memory is 7.1 GB. [2018-09-26 21:24:03,137 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 0.24 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 43.66 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.35 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 274.17 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235707.91 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -133.2 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 132.7 MB). Peak memory consumption was 453.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 31]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 31). Cancelled while BasicCegarLoop was analyzing trace of length 227 with TraceHistMax 112, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 105 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 235.6s OverallTime, 112 OverallIterations, 112 TraceHistogramMax, 22.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 444 SDtfs, 0 SDslu, 9989 SDs, 0 SdLazy, 10100 SolverSat, 185 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18867 GetRequests, 12651 SyntacticMatches, 0 SemanticMatches, 6216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 190.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=227occurred in iteration=111, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 111 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 6.8s SatisfiabilityAnalysisTime, 195.6s InterpolantComputationTime, 25304 NumberOfCodeBlocks, 25304 NumberOfCodeBlocksAsserted, 3264 NumberOfCheckSat, 25083 ConstructedInterpolants, 0 QuantifiedInterpolants, 11189001 SizeOfPredicates, 110 NumberOfNonLiveVariables, 25850 ConjunctsInSsa, 6325 ConjunctsInUnsatCore, 221 InterpolantComputations, 1 PerfectInterpolantSequences, 0/911680 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-24-03-145.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-24-03-145.csv Completed graceful shutdown