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/gj2007.c.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:21:06,908 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:21:06,910 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:21:06,922 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:21:06,923 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:21:06,924 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:21:06,925 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:21:06,927 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:21:06,929 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:21:06,931 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:21:06,932 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 21:21:06,959 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 21:21:06,979 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:21:06,979 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:21:06,980 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:21:06,980 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:21:06,980 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:21:06,981 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:21:06,981 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:21:06,981 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:21:06,981 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:21:06,982 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:21:06,982 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:21:06,982 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:21:06,982 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:21:06,982 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:21:06,982 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:21:06,983 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:21:06,983 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:21:06,983 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:21:06,983 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:21:06,983 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:21:06,984 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:21:06,984 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:21:06,984 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:21:06,984 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:21:06,984 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:21:06,985 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:21:06,985 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:21:06,985 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:21:06,985 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:21:06,985 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:21:07,034 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:21:07,050 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:21:07,055 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:21:07,057 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:21:07,057 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:21:07,058 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/gj2007.c.i_4.bpl [2018-09-26 21:21:07,058 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/gj2007.c.i_4.bpl' [2018-09-26 21:21:07,116 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:21:07,119 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:21:07,120 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:21:07,120 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:21:07,120 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:21:07,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:21:07" (1/1) ... [2018-09-26 21:21:07,153 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:21:07" (1/1) ... [2018-09-26 21:21:07,160 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:21:07,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:21:07,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:21:07,161 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:21:07,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:21:07" (1/1) ... [2018-09-26 21:21:07,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:21:07" (1/1) ... [2018-09-26 21:21:07,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:21:07" (1/1) ... [2018-09-26 21:21:07,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:21:07" (1/1) ... [2018-09-26 21:21:07,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:21:07" (1/1) ... [2018-09-26 21:21:07,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:21:07" (1/1) ... [2018-09-26 21:21:07,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:21:07" (1/1) ... [2018-09-26 21:21:07,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:21:07,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:21:07,181 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:21:07,181 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:21:07,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:21:07" (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 21:21:07,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 21:21:07,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 21:21:07,480 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 21:21:07,481 INFO L202 PluginConnector]: Adding new model gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:21:07 BoogieIcfgContainer [2018-09-26 21:21:07,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:21:07,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:21:07,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:21:07,486 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:21:07,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:21:07" (1/2) ... [2018-09-26 21:21:07,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a9b483 and model type gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:21:07, skipping insertion in model container [2018-09-26 21:21:07,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:21:07" (2/2) ... [2018-09-26 21:21:07,490 INFO L112 eAbstractionObserver]: Analyzing ICFG gj2007.c.i_4.bpl [2018-09-26 21:21:07,500 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:21:07,511 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:21:07,562 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:21:07,562 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:21:07,563 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:21:07,563 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:21:07,563 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:21:07,563 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:21:07,563 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:21:07,564 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:21:07,564 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:21:07,579 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-26 21:21:07,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 21:21:07,586 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:07,587 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-26 21:21:07,588 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:07,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:07,595 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-26 21:21:07,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:07,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:07,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:07,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:07,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:07,750 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 21:21:07,752 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:21:07,753 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 21:21:07,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:21:07,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:21:07,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:21:07,774 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-26 21:21:07,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:07,843 INFO L93 Difference]: Finished difference Result 14 states and 20 transitions. [2018-09-26 21:21:07,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:21:07,846 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-26 21:21:07,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:07,855 INFO L225 Difference]: With dead ends: 14 [2018-09-26 21:21:07,855 INFO L226 Difference]: Without dead ends: 9 [2018-09-26 21:21:07,859 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 21:21:07,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-26 21:21:07,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-26 21:21:07,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:21:07,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-26 21:21:07,896 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2018-09-26 21:21:07,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:07,897 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-26 21:21:07,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:21:07,897 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-26 21:21:07,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:21:07,898 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:07,898 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-26 21:21:07,898 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:07,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:07,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1807905788, now seen corresponding path program 1 times [2018-09-26 21:21:07,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:07,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:07,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:07,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:07,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:08,051 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 21:21:08,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:08,052 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 21:21:08,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:08,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:08,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:08,268 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-26 21:21:08,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2018-09-26 21:21:08,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:21:08,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:21:08,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:21:08,270 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-09-26 21:21:08,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:08,415 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2018-09-26 21:21:08,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:21:08,416 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-26 21:21:08,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:08,417 INFO L225 Difference]: With dead ends: 20 [2018-09-26 21:21:08,417 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:21:08,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:21:08,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:21:08,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2018-09-26 21:21:08,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:21:08,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-09-26 21:21:08,429 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 7 [2018-09-26 21:21:08,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:08,430 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-09-26 21:21:08,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:21:08,430 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-09-26 21:21:08,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:21:08,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:08,431 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1] [2018-09-26 21:21:08,431 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:08,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:08,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1839610074, now seen corresponding path program 1 times [2018-09-26 21:21:08,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:08,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:08,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:08,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:08,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:08,526 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:08,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:08,526 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 21:21:08,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:08,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:08,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:08,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:21:08,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:21:08,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:21:08,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:21:08,598 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2018-09-26 21:21:08,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:08,692 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2018-09-26 21:21:08,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:21:08,693 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-09-26 21:21:08,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:08,694 INFO L225 Difference]: With dead ends: 24 [2018-09-26 21:21:08,694 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:21:08,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 21:21:08,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:21:08,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-26 21:21:08,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-26 21:21:08,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-09-26 21:21:08,700 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2018-09-26 21:21:08,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:08,700 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-09-26 21:21:08,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:21:08,701 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-09-26 21:21:08,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:21:08,701 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:08,702 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1] [2018-09-26 21:21:08,702 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:08,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:08,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1731932091, now seen corresponding path program 2 times [2018-09-26 21:21:08,703 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:08,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:08,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:08,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:08,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:08,935 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:08,935 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 21:21:08,955 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:09,006 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:09,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:09,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:09,045 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:09,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:21:09,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:21:09,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:21:09,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:21:09,046 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 6 states. [2018-09-26 21:21:09,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:09,146 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-09-26 21:21:09,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:21:09,147 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-09-26 21:21:09,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:09,148 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:21:09,148 INFO L226 Difference]: Without dead ends: 20 [2018-09-26 21:21:09,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:21:09,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-26 21:21:09,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-26 21:21:09,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:21:09,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-09-26 21:21:09,154 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2018-09-26 21:21:09,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:09,155 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-09-26 21:21:09,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:21:09,155 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-09-26 21:21:09,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:21:09,156 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:09,156 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 4, 1, 1, 1, 1] [2018-09-26 21:21:09,156 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:09,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:09,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1975221498, now seen corresponding path program 3 times [2018-09-26 21:21:09,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:09,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:09,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:09,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:09,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:09,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:09,277 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 21:21:09,285 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:21:09,293 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-26 21:21:09,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:09,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:21:09,398 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:09,398 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2018-09-26 21:21:09,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:21:09,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:21:09,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:21:09,402 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2018-09-26 21:21:09,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:09,522 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2018-09-26 21:21:09,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:21:09,523 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-09-26 21:21:09,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:09,526 INFO L225 Difference]: With dead ends: 34 [2018-09-26 21:21:09,526 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:21:09,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 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 21:21:09,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:21:09,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-09-26 21:21:09,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:21:09,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-09-26 21:21:09,538 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2018-09-26 21:21:09,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:09,538 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-09-26 21:21:09,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:21:09,538 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-09-26 21:21:09,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-26 21:21:09,539 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:09,539 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 5, 2, 1, 1, 1] [2018-09-26 21:21:09,539 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:09,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:09,540 INFO L82 PathProgramCache]: Analyzing trace with hash -2006868068, now seen corresponding path program 4 times [2018-09-26 21:21:09,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:09,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:09,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:09,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:09,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:09,667 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-26 21:21:09,667 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:09,667 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 21:21:09,677 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:21:09,690 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:21:09,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:09,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-26 21:21:09,728 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:09,728 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:21:09,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:21:09,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:21:09,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:21:09,729 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 8 states. [2018-09-26 21:21:09,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:09,788 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2018-09-26 21:21:09,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:21:09,788 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2018-09-26 21:21:09,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:09,789 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:21:09,789 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:21:09,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:21:09,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:21:09,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-26 21:21:09,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-26 21:21:09,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-09-26 21:21:09,797 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2018-09-26 21:21:09,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:09,798 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-09-26 21:21:09,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:21:09,798 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-09-26 21:21:09,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:21:09,799 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:09,799 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 6, 2, 1, 1, 1] [2018-09-26 21:21:09,799 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:09,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:09,800 INFO L82 PathProgramCache]: Analyzing trace with hash -266768761, now seen corresponding path program 5 times [2018-09-26 21:21:09,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:09,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:09,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:09,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:09,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:09,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 35 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-26 21:21:10,179 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:10,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:10,204 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:21:10,299 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:21:10,300 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:10,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:10,312 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 35 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-26 21:21:10,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:10,340 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:21:10,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:21:10,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:21:10,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:21:10,341 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2018-09-26 21:21:10,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:10,418 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2018-09-26 21:21:10,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:21:10,421 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-09-26 21:21:10,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:10,422 INFO L225 Difference]: With dead ends: 42 [2018-09-26 21:21:10,422 INFO L226 Difference]: Without dead ends: 32 [2018-09-26 21:21:10,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:21:10,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-26 21:21:10,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-26 21:21:10,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:21:10,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-09-26 21:21:10,430 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2018-09-26 21:21:10,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:10,430 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-09-26 21:21:10,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:21:10,430 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-09-26 21:21:10,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-26 21:21:10,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:10,431 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 7, 2, 1, 1, 1] [2018-09-26 21:21:10,432 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:10,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:10,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1223576644, now seen corresponding path program 6 times [2018-09-26 21:21:10,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:10,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:10,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:10,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:10,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 40 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-26 21:21:10,577 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:10,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:10,586 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:21:10,606 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:21:10,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:10,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 56 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-26 21:21:10,708 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:10,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 13 [2018-09-26 21:21:10,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:21:10,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:21:10,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:21:10,709 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 13 states. [2018-09-26 21:21:10,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:10,820 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2018-09-26 21:21:10,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:21:10,821 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2018-09-26 21:21:10,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:10,823 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:21:10,823 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:21:10,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:21:10,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:21:10,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-09-26 21:21:10,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-26 21:21:10,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2018-09-26 21:21:10,832 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 31 [2018-09-26 21:21:10,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:10,832 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2018-09-26 21:21:10,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:21:10,832 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2018-09-26 21:21:10,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-26 21:21:10,833 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:10,834 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 8, 3, 1, 1, 1] [2018-09-26 21:21:10,834 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:10,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:10,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1547890150, now seen corresponding path program 7 times [2018-09-26 21:21:10,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:10,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:10,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:10,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:10,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:11,093 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 72 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-26 21:21:11,094 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:11,094 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 21:21:11,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:11,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 72 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-26 21:21:11,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:11,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:21:11,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:21:11,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:21:11,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:21:11,177 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 11 states. [2018-09-26 21:21:11,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:11,410 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2018-09-26 21:21:11,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:21:11,411 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2018-09-26 21:21:11,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:11,412 INFO L225 Difference]: With dead ends: 54 [2018-09-26 21:21:11,412 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:21:11,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:21:11,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:21:11,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-26 21:21:11,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:21:11,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-09-26 21:21:11,429 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 37 [2018-09-26 21:21:11,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:11,432 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-09-26 21:21:11,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:21:11,433 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-09-26 21:21:11,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-26 21:21:11,434 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:11,434 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 9, 3, 1, 1, 1] [2018-09-26 21:21:11,434 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:11,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:11,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1837705083, now seen corresponding path program 8 times [2018-09-26 21:21:11,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:11,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:11,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:11,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:11,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 80 proven. 135 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-26 21:21:11,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:11,744 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 21:21:11,754 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:11,767 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:11,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:11,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 80 proven. 135 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-26 21:21:11,802 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:11,803 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-26 21:21:11,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:21:11,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:21:11,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:21:11,804 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 12 states. [2018-09-26 21:21:11,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:11,902 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2018-09-26 21:21:11,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:21:11,903 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2018-09-26 21:21:11,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:11,904 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:21:11,904 INFO L226 Difference]: Without dead ends: 44 [2018-09-26 21:21:11,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:21:11,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-26 21:21:11,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-26 21:21:11,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-26 21:21:11,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2018-09-26 21:21:11,914 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 40 [2018-09-26 21:21:11,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:11,914 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2018-09-26 21:21:11,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:21:11,914 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2018-09-26 21:21:11,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-26 21:21:11,915 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:11,915 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 10, 3, 1, 1, 1] [2018-09-26 21:21:11,916 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:11,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:11,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1464858170, now seen corresponding path program 9 times [2018-09-26 21:21:11,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:11,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:11,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:11,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:11,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:11,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:12,067 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 88 proven. 165 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-26 21:21:12,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:12,068 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 21:21:12,076 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:21:12,105 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:21:12,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:12,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:12,196 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 110 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2018-09-26 21:21:12,217 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:12,217 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 17 [2018-09-26 21:21:12,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:21:12,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:21:12,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:21:12,219 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 17 states. [2018-09-26 21:21:12,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:12,354 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2018-09-26 21:21:12,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:21:12,355 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2018-09-26 21:21:12,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:12,357 INFO L225 Difference]: With dead ends: 64 [2018-09-26 21:21:12,357 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:21:12,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:21:12,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:21:12,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2018-09-26 21:21:12,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-26 21:21:12,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2018-09-26 21:21:12,366 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 43 [2018-09-26 21:21:12,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:12,367 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2018-09-26 21:21:12,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:21:12,367 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2018-09-26 21:21:12,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-26 21:21:12,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:12,368 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 11, 4, 1, 1, 1] [2018-09-26 21:21:12,368 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:12,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:12,369 INFO L82 PathProgramCache]: Analyzing trace with hash 469061468, now seen corresponding path program 10 times [2018-09-26 21:21:12,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:12,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:12,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:12,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:12,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:12,586 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 132 proven. 198 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-26 21:21:12,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:12,586 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 21:21:12,594 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:21:12,618 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:21:12,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:12,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 132 proven. 198 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-26 21:21:12,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:12,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:21:12,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:21:12,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:21:12,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:21:12,657 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 14 states. [2018-09-26 21:21:12,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:12,748 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2018-09-26 21:21:12,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:21:12,750 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2018-09-26 21:21:12,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:12,751 INFO L225 Difference]: With dead ends: 69 [2018-09-26 21:21:12,751 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:21:12,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:21:12,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:21:12,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-26 21:21:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-26 21:21:12,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2018-09-26 21:21:12,759 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 49 [2018-09-26 21:21:12,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:12,759 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2018-09-26 21:21:12,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:21:12,760 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2018-09-26 21:21:12,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-26 21:21:12,760 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:12,761 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 12, 4, 1, 1, 1] [2018-09-26 21:21:12,761 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:12,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:12,761 INFO L82 PathProgramCache]: Analyzing trace with hash -990261945, now seen corresponding path program 11 times [2018-09-26 21:21:12,761 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:12,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:12,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:12,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:12,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 143 proven. 234 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-26 21:21:12,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:12,979 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 21:21:12,988 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:21:13,019 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-09-26 21:21:13,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:13,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:13,037 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 143 proven. 234 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-26 21:21:13,060 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:13,060 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-26 21:21:13,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:21:13,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:21:13,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:21:13,061 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 15 states. [2018-09-26 21:21:13,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:13,208 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2018-09-26 21:21:13,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:21:13,208 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2018-09-26 21:21:13,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:13,209 INFO L225 Difference]: With dead ends: 72 [2018-09-26 21:21:13,209 INFO L226 Difference]: Without dead ends: 56 [2018-09-26 21:21:13,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:21:13,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-26 21:21:13,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-26 21:21:13,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-26 21:21:13,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2018-09-26 21:21:13,216 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 52 [2018-09-26 21:21:13,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:13,217 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2018-09-26 21:21:13,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:21:13,217 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2018-09-26 21:21:13,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-26 21:21:13,218 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:13,218 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 13, 4, 1, 1, 1] [2018-09-26 21:21:13,218 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:13,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:13,218 INFO L82 PathProgramCache]: Analyzing trace with hash -2035088516, now seen corresponding path program 12 times [2018-09-26 21:21:13,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:13,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:13,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:13,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:13,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:13,430 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 154 proven. 273 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-26 21:21:13,431 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:13,431 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 21:21:13,439 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:21:13,616 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-09-26 21:21:13,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:13,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 182 proven. 26 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2018-09-26 21:21:14,490 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:14,490 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 21 [2018-09-26 21:21:14,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:21:14,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:21:14,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:21:14,491 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 21 states. [2018-09-26 21:21:14,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:14,650 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2018-09-26 21:21:14,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:21:14,650 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2018-09-26 21:21:14,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:14,651 INFO L225 Difference]: With dead ends: 79 [2018-09-26 21:21:14,651 INFO L226 Difference]: Without dead ends: 63 [2018-09-26 21:21:14,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:21:14,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-26 21:21:14,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2018-09-26 21:21:14,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-26 21:21:14,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2018-09-26 21:21:14,661 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 55 [2018-09-26 21:21:14,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:14,661 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2018-09-26 21:21:14,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:21:14,662 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2018-09-26 21:21:14,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-26 21:21:14,663 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:14,663 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 14, 5, 1, 1, 1] [2018-09-26 21:21:14,663 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:14,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:14,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1900338010, now seen corresponding path program 13 times [2018-09-26 21:21:14,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:14,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:14,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:14,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:14,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 210 proven. 315 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-09-26 21:21:15,136 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:15,136 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 21:21:15,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:15,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 210 proven. 315 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-09-26 21:21:15,215 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:15,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-26 21:21:15,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:21:15,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:21:15,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:21:15,216 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 17 states. [2018-09-26 21:21:15,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:15,344 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2018-09-26 21:21:15,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:21:15,345 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2018-09-26 21:21:15,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:15,346 INFO L225 Difference]: With dead ends: 84 [2018-09-26 21:21:15,347 INFO L226 Difference]: Without dead ends: 65 [2018-09-26 21:21:15,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:21:15,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-26 21:21:15,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-26 21:21:15,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-26 21:21:15,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2018-09-26 21:21:15,363 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 61 [2018-09-26 21:21:15,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:15,364 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2018-09-26 21:21:15,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:21:15,364 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2018-09-26 21:21:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-26 21:21:15,366 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:15,366 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 15, 5, 1, 1, 1] [2018-09-26 21:21:15,367 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:15,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:15,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1598238523, now seen corresponding path program 14 times [2018-09-26 21:21:15,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:15,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:15,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:15,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:15,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:15,614 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 224 proven. 360 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-09-26 21:21:15,614 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:15,614 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 21:21:15,631 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:15,661 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:15,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:15,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 224 proven. 360 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-09-26 21:21:15,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:15,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-26 21:21:15,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:21:15,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:21:15,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:21:15,703 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 18 states. [2018-09-26 21:21:15,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:15,826 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2018-09-26 21:21:15,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:21:15,826 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 64 [2018-09-26 21:21:15,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:15,827 INFO L225 Difference]: With dead ends: 87 [2018-09-26 21:21:15,827 INFO L226 Difference]: Without dead ends: 68 [2018-09-26 21:21:15,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 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 21:21:15,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-26 21:21:15,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-26 21:21:15,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-26 21:21:15,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2018-09-26 21:21:15,834 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 64 [2018-09-26 21:21:15,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:15,835 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2018-09-26 21:21:15,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:21:15,835 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2018-09-26 21:21:15,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-26 21:21:15,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:15,836 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 16, 5, 1, 1, 1] [2018-09-26 21:21:15,836 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:15,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:15,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1720361094, now seen corresponding path program 15 times [2018-09-26 21:21:15,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:15,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:15,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:15,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:15,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 238 proven. 408 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-09-26 21:21:16,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:16,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:16,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:21:16,151 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:21:16,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:16,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 272 proven. 40 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2018-09-26 21:21:16,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:16,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 25 [2018-09-26 21:21:16,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:21:16,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:21:16,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:21:16,426 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 25 states. [2018-09-26 21:21:16,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:16,889 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2018-09-26 21:21:16,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:21:16,892 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 67 [2018-09-26 21:21:16,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:16,893 INFO L225 Difference]: With dead ends: 94 [2018-09-26 21:21:16,893 INFO L226 Difference]: Without dead ends: 75 [2018-09-26 21:21:16,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:21:16,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-26 21:21:16,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2018-09-26 21:21:16,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-26 21:21:16,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2018-09-26 21:21:16,900 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 67 [2018-09-26 21:21:16,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:16,900 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2018-09-26 21:21:16,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:21:16,901 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2018-09-26 21:21:16,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-26 21:21:16,902 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:16,902 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 17, 6, 1, 1, 1] [2018-09-26 21:21:16,902 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:16,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:16,902 INFO L82 PathProgramCache]: Analyzing trace with hash -867234020, now seen corresponding path program 16 times [2018-09-26 21:21:16,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:16,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:16,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:16,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:16,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 306 proven. 459 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-09-26 21:21:17,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:17,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:17,271 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:21:17,303 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:21:17,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:17,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 306 proven. 459 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-09-26 21:21:17,352 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:17,353 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:21:17,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:21:17,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:21:17,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:21:17,353 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 20 states. [2018-09-26 21:21:17,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:17,452 INFO L93 Difference]: Finished difference Result 99 states and 112 transitions. [2018-09-26 21:21:17,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:21:17,452 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 73 [2018-09-26 21:21:17,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:17,453 INFO L225 Difference]: With dead ends: 99 [2018-09-26 21:21:17,454 INFO L226 Difference]: Without dead ends: 77 [2018-09-26 21:21:17,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:21:17,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-26 21:21:17,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-26 21:21:17,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-26 21:21:17,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2018-09-26 21:21:17,460 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 73 [2018-09-26 21:21:17,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:17,460 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2018-09-26 21:21:17,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:21:17,460 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2018-09-26 21:21:17,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-26 21:21:17,461 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:17,461 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 18, 6, 1, 1, 1] [2018-09-26 21:21:17,461 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:17,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:17,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1757201401, now seen corresponding path program 17 times [2018-09-26 21:21:17,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:17,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:17,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:17,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:17,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 323 proven. 513 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-09-26 21:21:17,768 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:17,768 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:17,777 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:21:17,811 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-26 21:21:17,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:17,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 323 proven. 513 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-09-26 21:21:17,853 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:17,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-26 21:21:17,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:21:17,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:21:17,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:21:17,855 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand 21 states. [2018-09-26 21:21:17,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:17,978 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2018-09-26 21:21:17,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:21:17,979 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 76 [2018-09-26 21:21:17,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:17,980 INFO L225 Difference]: With dead ends: 102 [2018-09-26 21:21:17,980 INFO L226 Difference]: Without dead ends: 80 [2018-09-26 21:21:17,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 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 21:21:17,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-26 21:21:17,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-26 21:21:17,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-26 21:21:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2018-09-26 21:21:17,985 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 76 [2018-09-26 21:21:17,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:17,985 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2018-09-26 21:21:17,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:21:17,986 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2018-09-26 21:21:17,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-26 21:21:17,986 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:17,986 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 19, 6, 1, 1, 1] [2018-09-26 21:21:17,987 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:17,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:17,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1942330564, now seen corresponding path program 18 times [2018-09-26 21:21:17,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:17,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:17,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:17,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:17,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 340 proven. 570 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-09-26 21:21:18,567 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:18,568 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 21:21:18,575 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:21:18,613 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-09-26 21:21:18,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:18,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 380 proven. 57 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2018-09-26 21:21:18,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:18,823 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 29 [2018-09-26 21:21:18,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:21:18,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:21:18,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:21:18,824 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 29 states. [2018-09-26 21:21:19,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:19,002 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2018-09-26 21:21:19,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:21:19,003 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2018-09-26 21:21:19,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:19,004 INFO L225 Difference]: With dead ends: 109 [2018-09-26 21:21:19,004 INFO L226 Difference]: Without dead ends: 87 [2018-09-26 21:21:19,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:21:19,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-26 21:21:19,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2018-09-26 21:21:19,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-26 21:21:19,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2018-09-26 21:21:19,010 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 79 [2018-09-26 21:21:19,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:19,011 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2018-09-26 21:21:19,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:21:19,011 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2018-09-26 21:21:19,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-26 21:21:19,011 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:19,012 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 20, 7, 1, 1, 1] [2018-09-26 21:21:19,012 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:19,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:19,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1524001638, now seen corresponding path program 19 times [2018-09-26 21:21:19,012 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:19,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:19,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:19,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:19,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:19,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 420 proven. 630 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-09-26 21:21:19,289 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:19,289 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 21:21:19,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:19,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 420 proven. 630 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-09-26 21:21:19,355 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:19,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-26 21:21:19,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:21:19,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:21:19,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:21:19,357 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand 23 states. [2018-09-26 21:21:19,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:19,421 INFO L93 Difference]: Finished difference Result 114 states and 129 transitions. [2018-09-26 21:21:19,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:21:19,422 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 85 [2018-09-26 21:21:19,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:19,423 INFO L225 Difference]: With dead ends: 114 [2018-09-26 21:21:19,423 INFO L226 Difference]: Without dead ends: 89 [2018-09-26 21:21:19,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:21:19,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-26 21:21:19,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-26 21:21:19,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-26 21:21:19,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2018-09-26 21:21:19,427 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 85 [2018-09-26 21:21:19,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:19,427 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2018-09-26 21:21:19,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:21:19,427 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2018-09-26 21:21:19,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-26 21:21:19,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:19,428 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 21, 7, 1, 1, 1] [2018-09-26 21:21:19,429 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:19,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:19,429 INFO L82 PathProgramCache]: Analyzing trace with hash 427997445, now seen corresponding path program 20 times [2018-09-26 21:21:19,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:19,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:19,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:19,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:19,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 440 proven. 693 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-09-26 21:21:19,834 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:19,834 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 21:21:19,841 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:19,861 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:19,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:19,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 440 proven. 693 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-09-26 21:21:19,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:19,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-26 21:21:19,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:21:19,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:21:19,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:21:19,900 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand 24 states. [2018-09-26 21:21:20,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:20,151 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2018-09-26 21:21:20,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:21:20,154 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 88 [2018-09-26 21:21:20,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:20,155 INFO L225 Difference]: With dead ends: 117 [2018-09-26 21:21:20,155 INFO L226 Difference]: Without dead ends: 92 [2018-09-26 21:21:20,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:21:20,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-26 21:21:20,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-26 21:21:20,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-26 21:21:20,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2018-09-26 21:21:20,160 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 88 [2018-09-26 21:21:20,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:20,161 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2018-09-26 21:21:20,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:21:20,161 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2018-09-26 21:21:20,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-26 21:21:20,161 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:20,162 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 22, 7, 1, 1, 1] [2018-09-26 21:21:20,162 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:20,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:20,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1424508742, now seen corresponding path program 21 times [2018-09-26 21:21:20,162 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:20,162 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:20,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:20,163 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:20,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:20,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 460 proven. 759 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-09-26 21:21:20,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:20,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:20,580 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:21:20,599 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-26 21:21:20,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:20,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 506 proven. 77 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2018-09-26 21:21:21,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:21,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 10] total 33 [2018-09-26 21:21:21,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:21:21,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:21:21,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:21:21,117 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand 33 states. [2018-09-26 21:21:21,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:21,438 INFO L93 Difference]: Finished difference Result 124 states and 142 transitions. [2018-09-26 21:21:21,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:21:21,438 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 91 [2018-09-26 21:21:21,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:21,440 INFO L225 Difference]: With dead ends: 124 [2018-09-26 21:21:21,440 INFO L226 Difference]: Without dead ends: 99 [2018-09-26 21:21:21,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:21:21,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-26 21:21:21,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2018-09-26 21:21:21,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-26 21:21:21,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2018-09-26 21:21:21,448 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 91 [2018-09-26 21:21:21,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:21,448 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2018-09-26 21:21:21,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:21:21,448 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2018-09-26 21:21:21,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-26 21:21:21,449 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:21,449 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 23, 8, 1, 1, 1] [2018-09-26 21:21:21,449 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:21,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:21,449 INFO L82 PathProgramCache]: Analyzing trace with hash 201514716, now seen corresponding path program 22 times [2018-09-26 21:21:21,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:21,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:21,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:21,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:21,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 552 proven. 828 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-09-26 21:21:22,513 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:22,514 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 21:21:22,525 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:21:22,550 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:21:22,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:22,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 552 proven. 828 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-09-26 21:21:22,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:22,593 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 21:21:22,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:21:22,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:21:22,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:21:22,594 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand 26 states. [2018-09-26 21:21:22,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:22,680 INFO L93 Difference]: Finished difference Result 129 states and 146 transitions. [2018-09-26 21:21:22,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:21:22,681 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 97 [2018-09-26 21:21:22,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:22,682 INFO L225 Difference]: With dead ends: 129 [2018-09-26 21:21:22,682 INFO L226 Difference]: Without dead ends: 101 [2018-09-26 21:21:22,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:21:22,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-26 21:21:22,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-26 21:21:22,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-26 21:21:22,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2018-09-26 21:21:22,688 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 97 [2018-09-26 21:21:22,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:22,688 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2018-09-26 21:21:22,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:21:22,688 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2018-09-26 21:21:22,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-26 21:21:22,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:22,689 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 24, 8, 1, 1, 1] [2018-09-26 21:21:22,689 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:22,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:22,689 INFO L82 PathProgramCache]: Analyzing trace with hash -527844665, now seen corresponding path program 23 times [2018-09-26 21:21:22,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:22,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:22,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:22,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:22,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 575 proven. 900 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-09-26 21:21:23,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:23,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:23,716 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:21:23,764 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2018-09-26 21:21:23,764 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:23,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:23,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 575 proven. 900 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-09-26 21:21:23,831 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:23,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-26 21:21:23,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:21:23,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:21:23,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:21:23,833 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand 27 states. [2018-09-26 21:21:24,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:24,104 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2018-09-26 21:21:24,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:21:24,105 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 100 [2018-09-26 21:21:24,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:24,106 INFO L225 Difference]: With dead ends: 132 [2018-09-26 21:21:24,106 INFO L226 Difference]: Without dead ends: 104 [2018-09-26 21:21:24,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:21:24,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-26 21:21:24,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-26 21:21:24,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-26 21:21:24,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2018-09-26 21:21:24,114 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 100 [2018-09-26 21:21:24,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:24,114 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2018-09-26 21:21:24,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:21:24,115 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2018-09-26 21:21:24,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-26 21:21:24,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:24,115 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 25, 8, 1, 1, 1] [2018-09-26 21:21:24,116 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:24,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:24,116 INFO L82 PathProgramCache]: Analyzing trace with hash -633613572, now seen corresponding path program 24 times [2018-09-26 21:21:24,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:24,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:24,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:24,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:24,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 598 proven. 975 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-09-26 21:21:24,639 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:24,639 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 21:21:24,649 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:21:24,688 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-09-26 21:21:24,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:24,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 650 proven. 100 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2018-09-26 21:21:24,919 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:24,919 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 11] total 37 [2018-09-26 21:21:24,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-26 21:21:24,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-26 21:21:24,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:21:24,920 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand 37 states. [2018-09-26 21:21:25,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:25,069 INFO L93 Difference]: Finished difference Result 139 states and 159 transitions. [2018-09-26 21:21:25,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:21:25,070 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 103 [2018-09-26 21:21:25,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:25,071 INFO L225 Difference]: With dead ends: 139 [2018-09-26 21:21:25,071 INFO L226 Difference]: Without dead ends: 111 [2018-09-26 21:21:25,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:21:25,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-26 21:21:25,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2018-09-26 21:21:25,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-26 21:21:25,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 119 transitions. [2018-09-26 21:21:25,078 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 119 transitions. Word has length 103 [2018-09-26 21:21:25,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:25,078 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 119 transitions. [2018-09-26 21:21:25,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-26 21:21:25,079 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 119 transitions. [2018-09-26 21:21:25,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-26 21:21:25,079 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:25,079 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 26, 9, 1, 1, 1] [2018-09-26 21:21:25,079 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:25,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:25,080 INFO L82 PathProgramCache]: Analyzing trace with hash 223821274, now seen corresponding path program 25 times [2018-09-26 21:21:25,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:25,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:25,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:25,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:25,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 702 proven. 1053 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-09-26 21:21:25,786 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:25,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:25,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:25,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:25,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 702 proven. 1053 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-09-26 21:21:25,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:25,868 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-26 21:21:25,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:21:25,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:21:25,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:21:25,869 INFO L87 Difference]: Start difference. First operand 110 states and 119 transitions. Second operand 29 states. [2018-09-26 21:21:26,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:26,011 INFO L93 Difference]: Finished difference Result 144 states and 163 transitions. [2018-09-26 21:21:26,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:21:26,011 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 109 [2018-09-26 21:21:26,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:26,012 INFO L225 Difference]: With dead ends: 144 [2018-09-26 21:21:26,012 INFO L226 Difference]: Without dead ends: 113 [2018-09-26 21:21:26,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:21:26,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-26 21:21:26,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-26 21:21:26,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-26 21:21:26,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2018-09-26 21:21:26,018 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 109 [2018-09-26 21:21:26,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:26,018 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2018-09-26 21:21:26,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:21:26,018 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2018-09-26 21:21:26,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-26 21:21:26,019 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:26,019 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 27, 9, 1, 1, 1] [2018-09-26 21:21:26,019 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:26,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:26,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1370788165, now seen corresponding path program 26 times [2018-09-26 21:21:26,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:26,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:26,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:26,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:26,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 728 proven. 1134 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-09-26 21:21:26,407 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:26,407 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:26,415 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:26,442 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:26,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:26,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:26,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 728 proven. 1134 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-09-26 21:21:26,490 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:26,490 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-26 21:21:26,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:21:26,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:21:26,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:21:26,491 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 30 states. [2018-09-26 21:21:26,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:26,678 INFO L93 Difference]: Finished difference Result 147 states and 166 transitions. [2018-09-26 21:21:26,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:21:26,678 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 112 [2018-09-26 21:21:26,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:26,679 INFO L225 Difference]: With dead ends: 147 [2018-09-26 21:21:26,679 INFO L226 Difference]: Without dead ends: 116 [2018-09-26 21:21:26,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:21:26,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-26 21:21:26,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-26 21:21:26,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-26 21:21:26,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2018-09-26 21:21:26,685 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 112 [2018-09-26 21:21:26,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:26,685 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2018-09-26 21:21:26,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:21:26,686 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2018-09-26 21:21:26,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-26 21:21:26,686 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:26,686 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 28, 9, 1, 1, 1] [2018-09-26 21:21:26,687 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:26,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:26,687 INFO L82 PathProgramCache]: Analyzing trace with hash -98369030, now seen corresponding path program 27 times [2018-09-26 21:21:26,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:26,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:26,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:26,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:26,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 754 proven. 1218 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-09-26 21:21:27,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:27,894 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 21:21:27,901 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:21:27,925 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-26 21:21:27,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:27,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:28,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 812 proven. 126 refuted. 0 times theorem prover too weak. 1134 trivial. 0 not checked. [2018-09-26 21:21:28,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:28,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 12] total 41 [2018-09-26 21:21:28,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:21:28,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:21:28,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:21:28,236 INFO L87 Difference]: Start difference. First operand 116 states and 125 transitions. Second operand 41 states. [2018-09-26 21:21:28,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:28,513 INFO L93 Difference]: Finished difference Result 154 states and 176 transitions. [2018-09-26 21:21:28,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:21:28,514 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 115 [2018-09-26 21:21:28,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:28,515 INFO L225 Difference]: With dead ends: 154 [2018-09-26 21:21:28,515 INFO L226 Difference]: Without dead ends: 123 [2018-09-26 21:21:28,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:21:28,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-26 21:21:28,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2018-09-26 21:21:28,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-26 21:21:28,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2018-09-26 21:21:28,524 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 115 [2018-09-26 21:21:28,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:28,525 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2018-09-26 21:21:28,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:21:28,525 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2018-09-26 21:21:28,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-26 21:21:28,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:28,526 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 29, 10, 1, 1, 1] [2018-09-26 21:21:28,526 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:28,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:28,527 INFO L82 PathProgramCache]: Analyzing trace with hash -291193188, now seen corresponding path program 28 times [2018-09-26 21:21:28,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:28,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:28,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:28,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:28,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:28,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 870 proven. 1305 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-09-26 21:21:29,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:29,152 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 21:21:29,159 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:21:29,187 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:21:29,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:29,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 870 proven. 1305 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-09-26 21:21:29,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:29,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-26 21:21:29,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:21:29,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:21:29,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:21:29,233 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand 32 states. [2018-09-26 21:21:29,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:29,357 INFO L93 Difference]: Finished difference Result 159 states and 180 transitions. [2018-09-26 21:21:29,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:21:29,357 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 121 [2018-09-26 21:21:29,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:29,359 INFO L225 Difference]: With dead ends: 159 [2018-09-26 21:21:29,359 INFO L226 Difference]: Without dead ends: 125 [2018-09-26 21:21:29,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:21:29,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-26 21:21:29,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-26 21:21:29,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-26 21:21:29,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2018-09-26 21:21:29,366 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 121 [2018-09-26 21:21:29,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:29,367 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2018-09-26 21:21:29,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:21:29,367 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2018-09-26 21:21:29,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-26 21:21:29,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:29,368 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 30, 10, 1, 1, 1] [2018-09-26 21:21:29,368 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:29,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:29,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1151252089, now seen corresponding path program 29 times [2018-09-26 21:21:29,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:29,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:29,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:29,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:29,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:29,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 899 proven. 1395 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-09-26 21:21:29,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:29,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:29,821 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:21:29,885 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2018-09-26 21:21:29,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:29,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 899 proven. 1395 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-09-26 21:21:29,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:29,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-26 21:21:29,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:21:29,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:21:29,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:21:29,931 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand 33 states. [2018-09-26 21:21:30,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:30,053 INFO L93 Difference]: Finished difference Result 162 states and 183 transitions. [2018-09-26 21:21:30,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:21:30,054 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 124 [2018-09-26 21:21:30,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:30,055 INFO L225 Difference]: With dead ends: 162 [2018-09-26 21:21:30,055 INFO L226 Difference]: Without dead ends: 128 [2018-09-26 21:21:30,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:21:30,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-26 21:21:30,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-26 21:21:30,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-26 21:21:30,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2018-09-26 21:21:30,061 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 124 [2018-09-26 21:21:30,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:30,061 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2018-09-26 21:21:30,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:21:30,061 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2018-09-26 21:21:30,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-26 21:21:30,062 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:30,062 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 31, 10, 1, 1, 1] [2018-09-26 21:21:30,062 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:30,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:30,063 INFO L82 PathProgramCache]: Analyzing trace with hash 608916156, now seen corresponding path program 30 times [2018-09-26 21:21:30,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:30,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:30,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:30,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:30,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 928 proven. 1488 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-09-26 21:21:30,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:30,687 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 21:21:30,695 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:21:30,741 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2018-09-26 21:21:30,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:30,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 992 proven. 155 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2018-09-26 21:21:31,059 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:31,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 13] total 45 [2018-09-26 21:21:31,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-26 21:21:31,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-26 21:21:31,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:21:31,060 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand 45 states. [2018-09-26 21:21:31,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:31,265 INFO L93 Difference]: Finished difference Result 169 states and 193 transitions. [2018-09-26 21:21:31,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:21:31,266 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 127 [2018-09-26 21:21:31,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:31,267 INFO L225 Difference]: With dead ends: 169 [2018-09-26 21:21:31,267 INFO L226 Difference]: Without dead ends: 135 [2018-09-26 21:21:31,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:21:31,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-26 21:21:31,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2018-09-26 21:21:31,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-26 21:21:31,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 145 transitions. [2018-09-26 21:21:31,275 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 145 transitions. Word has length 127 [2018-09-26 21:21:31,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:31,276 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 145 transitions. [2018-09-26 21:21:31,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-26 21:21:31,276 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 145 transitions. [2018-09-26 21:21:31,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-26 21:21:31,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:31,277 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 32, 11, 1, 1, 1] [2018-09-26 21:21:31,277 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:31,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:31,277 INFO L82 PathProgramCache]: Analyzing trace with hash 918148890, now seen corresponding path program 31 times [2018-09-26 21:21:31,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:31,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:31,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:31,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:31,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 1056 proven. 1584 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-09-26 21:21:31,944 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:31,944 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 21:21:31,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:31,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 1056 proven. 1584 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-09-26 21:21:32,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:32,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-26 21:21:32,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:21:32,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:21:32,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:21:32,027 INFO L87 Difference]: Start difference. First operand 134 states and 145 transitions. Second operand 35 states. [2018-09-26 21:21:32,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:32,180 INFO L93 Difference]: Finished difference Result 174 states and 197 transitions. [2018-09-26 21:21:32,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:21:32,180 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 133 [2018-09-26 21:21:32,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:32,182 INFO L225 Difference]: With dead ends: 174 [2018-09-26 21:21:32,182 INFO L226 Difference]: Without dead ends: 137 [2018-09-26 21:21:32,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:21:32,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-26 21:21:32,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-26 21:21:32,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-26 21:21:32,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2018-09-26 21:21:32,188 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 133 [2018-09-26 21:21:32,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:32,189 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2018-09-26 21:21:32,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:21:32,189 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2018-09-26 21:21:32,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-26 21:21:32,189 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:32,190 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 33, 11, 1, 1, 1] [2018-09-26 21:21:32,190 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:32,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:32,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1564367237, now seen corresponding path program 32 times [2018-09-26 21:21:32,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:32,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:32,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:32,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:32,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 1088 proven. 1683 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-09-26 21:21:32,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:32,895 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 21:21:32,901 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:32,934 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:32,935 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:32,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 1088 proven. 1683 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-09-26 21:21:32,975 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:32,975 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-26 21:21:32,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:21:32,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:21:32,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:21:32,976 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand 36 states. [2018-09-26 21:21:33,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:33,164 INFO L93 Difference]: Finished difference Result 177 states and 200 transitions. [2018-09-26 21:21:33,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:21:33,164 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 136 [2018-09-26 21:21:33,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:33,165 INFO L225 Difference]: With dead ends: 177 [2018-09-26 21:21:33,166 INFO L226 Difference]: Without dead ends: 140 [2018-09-26 21:21:33,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:21:33,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-26 21:21:33,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-26 21:21:33,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-26 21:21:33,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 151 transitions. [2018-09-26 21:21:33,172 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 151 transitions. Word has length 136 [2018-09-26 21:21:33,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:33,173 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 151 transitions. [2018-09-26 21:21:33,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:21:33,173 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 151 transitions. [2018-09-26 21:21:33,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-26 21:21:33,174 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:33,174 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 34, 11, 1, 1, 1] [2018-09-26 21:21:33,174 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:33,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:33,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1283245254, now seen corresponding path program 33 times [2018-09-26 21:21:33,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:33,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:33,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:33,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:33,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 1120 proven. 1785 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-09-26 21:21:34,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:34,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:34,138 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:21:34,168 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-26 21:21:34,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:34,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 1190 proven. 187 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2018-09-26 21:21:34,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:34,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 14] total 49 [2018-09-26 21:21:34,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-26 21:21:34,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-26 21:21:34,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:21:34,579 INFO L87 Difference]: Start difference. First operand 140 states and 151 transitions. Second operand 49 states. [2018-09-26 21:21:34,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:34,824 INFO L93 Difference]: Finished difference Result 184 states and 210 transitions. [2018-09-26 21:21:34,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:21:34,825 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 139 [2018-09-26 21:21:34,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:34,827 INFO L225 Difference]: With dead ends: 184 [2018-09-26 21:21:34,827 INFO L226 Difference]: Without dead ends: 147 [2018-09-26 21:21:34,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:21:34,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-26 21:21:34,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2018-09-26 21:21:34,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-26 21:21:34,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 158 transitions. [2018-09-26 21:21:34,835 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 158 transitions. Word has length 139 [2018-09-26 21:21:34,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:34,835 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 158 transitions. [2018-09-26 21:21:34,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-26 21:21:34,835 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 158 transitions. [2018-09-26 21:21:34,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-26 21:21:34,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:34,836 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 35, 12, 1, 1, 1] [2018-09-26 21:21:34,836 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:34,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:34,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1757982300, now seen corresponding path program 34 times [2018-09-26 21:21:34,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:34,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:34,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:34,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:34,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 1260 proven. 1890 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-09-26 21:21:35,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:35,496 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 21:21:35,504 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:21:35,548 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:21:35,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:35,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:35,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 1260 proven. 1890 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-09-26 21:21:35,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:35,615 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-26 21:21:35,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:21:35,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:21:35,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:21:35,616 INFO L87 Difference]: Start difference. First operand 146 states and 158 transitions. Second operand 38 states. [2018-09-26 21:21:36,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:36,376 INFO L93 Difference]: Finished difference Result 189 states and 214 transitions. [2018-09-26 21:21:36,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:21:36,376 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 145 [2018-09-26 21:21:36,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:36,378 INFO L225 Difference]: With dead ends: 189 [2018-09-26 21:21:36,378 INFO L226 Difference]: Without dead ends: 149 [2018-09-26 21:21:36,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:21:36,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-26 21:21:36,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-26 21:21:36,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-26 21:21:36,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 161 transitions. [2018-09-26 21:21:36,386 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 161 transitions. Word has length 145 [2018-09-26 21:21:36,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:36,386 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 161 transitions. [2018-09-26 21:21:36,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:21:36,386 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 161 transitions. [2018-09-26 21:21:36,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-26 21:21:36,387 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:36,387 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 36, 12, 1, 1, 1] [2018-09-26 21:21:36,388 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:36,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:36,388 INFO L82 PathProgramCache]: Analyzing trace with hash 593356871, now seen corresponding path program 35 times [2018-09-26 21:21:36,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:36,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:36,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:36,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:36,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 1295 proven. 1998 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-09-26 21:21:37,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:37,420 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 21:21:37,429 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:21:37,888 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-26 21:21:37,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:37,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:37,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 1295 proven. 1998 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-09-26 21:21:37,963 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:37,963 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-26 21:21:37,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-26 21:21:37,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-26 21:21:37,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:21:37,965 INFO L87 Difference]: Start difference. First operand 149 states and 161 transitions. Second operand 39 states. [2018-09-26 21:21:38,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:38,195 INFO L93 Difference]: Finished difference Result 192 states and 217 transitions. [2018-09-26 21:21:38,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:21:38,196 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 148 [2018-09-26 21:21:38,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:38,196 INFO L225 Difference]: With dead ends: 192 [2018-09-26 21:21:38,197 INFO L226 Difference]: Without dead ends: 152 [2018-09-26 21:21:38,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:21:38,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-26 21:21:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-09-26 21:21:38,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-09-26 21:21:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 164 transitions. [2018-09-26 21:21:38,204 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 164 transitions. Word has length 148 [2018-09-26 21:21:38,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:38,205 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 164 transitions. [2018-09-26 21:21:38,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-26 21:21:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 164 transitions. [2018-09-26 21:21:38,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-09-26 21:21:38,206 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:38,206 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 37, 12, 1, 1, 1] [2018-09-26 21:21:38,206 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:38,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:38,206 INFO L82 PathProgramCache]: Analyzing trace with hash -16981380, now seen corresponding path program 36 times [2018-09-26 21:21:38,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:38,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:38,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:38,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:38,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:40,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 1330 proven. 2109 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-09-26 21:21:40,265 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:40,265 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:40,273 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:21:40,331 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-09-26 21:21:40,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:40,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 1406 proven. 222 refuted. 0 times theorem prover too weak. 1998 trivial. 0 not checked. [2018-09-26 21:21:40,874 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:40,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 15] total 53 [2018-09-26 21:21:40,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:21:40,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:21:40,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:21:40,876 INFO L87 Difference]: Start difference. First operand 152 states and 164 transitions. Second operand 53 states. [2018-09-26 21:21:41,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:41,180 INFO L93 Difference]: Finished difference Result 199 states and 227 transitions. [2018-09-26 21:21:41,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:21:41,180 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 151 [2018-09-26 21:21:41,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:41,182 INFO L225 Difference]: With dead ends: 199 [2018-09-26 21:21:41,182 INFO L226 Difference]: Without dead ends: 159 [2018-09-26 21:21:41,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:21:41,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-26 21:21:41,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2018-09-26 21:21:41,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-26 21:21:41,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 171 transitions. [2018-09-26 21:21:41,189 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 171 transitions. Word has length 151 [2018-09-26 21:21:41,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:41,190 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 171 transitions. [2018-09-26 21:21:41,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:21:41,190 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 171 transitions. [2018-09-26 21:21:41,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-26 21:21:41,191 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:41,191 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 38, 13, 1, 1, 1] [2018-09-26 21:21:41,191 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:41,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:41,191 INFO L82 PathProgramCache]: Analyzing trace with hash 758997082, now seen corresponding path program 37 times [2018-09-26 21:21:41,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:41,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:41,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:41,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:41,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 1482 proven. 2223 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-09-26 21:21:41,889 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:41,889 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 21:21:41,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:41,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:41,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 1482 proven. 2223 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-09-26 21:21:41,983 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:41,984 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-26 21:21:41,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:21:41,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:21:41,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:21:41,985 INFO L87 Difference]: Start difference. First operand 158 states and 171 transitions. Second operand 41 states. [2018-09-26 21:21:42,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:42,129 INFO L93 Difference]: Finished difference Result 204 states and 231 transitions. [2018-09-26 21:21:42,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:21:42,130 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 157 [2018-09-26 21:21:42,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:42,131 INFO L225 Difference]: With dead ends: 204 [2018-09-26 21:21:42,131 INFO L226 Difference]: Without dead ends: 161 [2018-09-26 21:21:42,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 157 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 21:21:42,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-26 21:21:42,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-26 21:21:42,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-26 21:21:42,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 174 transitions. [2018-09-26 21:21:42,139 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 174 transitions. Word has length 157 [2018-09-26 21:21:42,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:42,140 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 174 transitions. [2018-09-26 21:21:42,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:21:42,140 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 174 transitions. [2018-09-26 21:21:42,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-26 21:21:42,141 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:42,141 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 39, 13, 1, 1, 1] [2018-09-26 21:21:42,141 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:42,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:42,141 INFO L82 PathProgramCache]: Analyzing trace with hash -821292603, now seen corresponding path program 38 times [2018-09-26 21:21:42,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:42,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:42,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:42,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:42,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:43,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 1520 proven. 2340 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-09-26 21:21:43,490 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:43,490 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 21:21:43,498 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:43,555 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:43,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:43,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 1520 proven. 2340 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-09-26 21:21:43,623 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:43,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-26 21:21:43,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:21:43,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:21:43,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:21:43,625 INFO L87 Difference]: Start difference. First operand 161 states and 174 transitions. Second operand 42 states. [2018-09-26 21:21:43,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:43,944 INFO L93 Difference]: Finished difference Result 207 states and 234 transitions. [2018-09-26 21:21:43,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:21:43,945 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 160 [2018-09-26 21:21:43,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:43,946 INFO L225 Difference]: With dead ends: 207 [2018-09-26 21:21:43,946 INFO L226 Difference]: Without dead ends: 164 [2018-09-26 21:21:43,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:21:43,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-26 21:21:43,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-26 21:21:43,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-26 21:21:43,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 177 transitions. [2018-09-26 21:21:43,955 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 177 transitions. Word has length 160 [2018-09-26 21:21:43,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:43,955 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 177 transitions. [2018-09-26 21:21:43,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:21:43,955 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 177 transitions. [2018-09-26 21:21:43,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-26 21:21:43,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:43,956 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 40, 13, 1, 1, 1] [2018-09-26 21:21:43,956 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:43,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:43,957 INFO L82 PathProgramCache]: Analyzing trace with hash -2094766982, now seen corresponding path program 39 times [2018-09-26 21:21:43,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:43,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:43,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:43,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:43,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 1558 proven. 2460 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-09-26 21:21:44,695 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:44,695 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 21:21:44,704 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:21:44,738 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-26 21:21:44,738 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:44,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 1640 proven. 260 refuted. 0 times theorem prover too weak. 2340 trivial. 0 not checked. [2018-09-26 21:21:45,696 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:45,696 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 16] total 57 [2018-09-26 21:21:45,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-26 21:21:45,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-26 21:21:45,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:21:45,697 INFO L87 Difference]: Start difference. First operand 164 states and 177 transitions. Second operand 57 states. [2018-09-26 21:21:46,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:46,247 INFO L93 Difference]: Finished difference Result 214 states and 244 transitions. [2018-09-26 21:21:46,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:21:46,248 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 163 [2018-09-26 21:21:46,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:46,249 INFO L225 Difference]: With dead ends: 214 [2018-09-26 21:21:46,249 INFO L226 Difference]: Without dead ends: 171 [2018-09-26 21:21:46,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:21:46,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-26 21:21:46,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2018-09-26 21:21:46,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-09-26 21:21:46,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 184 transitions. [2018-09-26 21:21:46,256 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 184 transitions. Word has length 163 [2018-09-26 21:21:46,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:46,256 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 184 transitions. [2018-09-26 21:21:46,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-26 21:21:46,256 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 184 transitions. [2018-09-26 21:21:46,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-09-26 21:21:46,257 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:46,257 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 41, 14, 1, 1, 1] [2018-09-26 21:21:46,257 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:46,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:46,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1878872548, now seen corresponding path program 40 times [2018-09-26 21:21:46,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:46,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:46,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:46,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:46,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 1722 proven. 2583 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-09-26 21:21:47,140 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:47,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:47,147 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:21:47,204 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:21:47,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:47,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:47,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 1722 proven. 2583 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-09-26 21:21:47,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:47,276 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-26 21:21:47,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:21:47,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:21:47,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:21:47,277 INFO L87 Difference]: Start difference. First operand 170 states and 184 transitions. Second operand 44 states. [2018-09-26 21:21:47,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:47,601 INFO L93 Difference]: Finished difference Result 219 states and 248 transitions. [2018-09-26 21:21:47,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:21:47,602 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 169 [2018-09-26 21:21:47,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:47,603 INFO L225 Difference]: With dead ends: 219 [2018-09-26 21:21:47,603 INFO L226 Difference]: Without dead ends: 173 [2018-09-26 21:21:47,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 169 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 21:21:47,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-26 21:21:47,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-26 21:21:47,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-26 21:21:47,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 187 transitions. [2018-09-26 21:21:47,611 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 187 transitions. Word has length 169 [2018-09-26 21:21:47,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:47,612 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 187 transitions. [2018-09-26 21:21:47,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:21:47,612 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 187 transitions. [2018-09-26 21:21:47,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-26 21:21:47,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:47,613 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 42, 14, 1, 1, 1] [2018-09-26 21:21:47,613 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:47,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:47,614 INFO L82 PathProgramCache]: Analyzing trace with hash 890476295, now seen corresponding path program 41 times [2018-09-26 21:21:47,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:47,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:47,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:47,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:47,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 1763 proven. 2709 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-09-26 21:21:49,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:49,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:49,138 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:21:49,236 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 57 check-sat command(s) [2018-09-26 21:21:49,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:49,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 1763 proven. 2709 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-09-26 21:21:49,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:49,307 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-26 21:21:49,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-26 21:21:49,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-26 21:21:49,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:21:49,309 INFO L87 Difference]: Start difference. First operand 173 states and 187 transitions. Second operand 45 states. [2018-09-26 21:21:49,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:49,525 INFO L93 Difference]: Finished difference Result 222 states and 251 transitions. [2018-09-26 21:21:49,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:21:49,525 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 172 [2018-09-26 21:21:49,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:49,527 INFO L225 Difference]: With dead ends: 222 [2018-09-26 21:21:49,527 INFO L226 Difference]: Without dead ends: 176 [2018-09-26 21:21:49,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:21:49,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-09-26 21:21:49,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-09-26 21:21:49,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-09-26 21:21:49,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 190 transitions. [2018-09-26 21:21:49,534 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 190 transitions. Word has length 172 [2018-09-26 21:21:49,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:49,534 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 190 transitions. [2018-09-26 21:21:49,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-26 21:21:49,535 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 190 transitions. [2018-09-26 21:21:49,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-09-26 21:21:49,535 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:49,535 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 43, 14, 1, 1, 1] [2018-09-26 21:21:49,535 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:49,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:49,536 INFO L82 PathProgramCache]: Analyzing trace with hash 535069244, now seen corresponding path program 42 times [2018-09-26 21:21:49,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:49,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:49,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:49,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:49,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 1804 proven. 2838 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-09-26 21:21:51,522 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:51,522 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 21:21:51,530 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:21:51,612 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2018-09-26 21:21:51,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:51,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 1892 proven. 301 refuted. 0 times theorem prover too weak. 2709 trivial. 0 not checked. [2018-09-26 21:21:52,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:52,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 17] total 61 [2018-09-26 21:21:52,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-26 21:21:52,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-26 21:21:52,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-26 21:21:52,198 INFO L87 Difference]: Start difference. First operand 176 states and 190 transitions. Second operand 61 states. [2018-09-26 21:21:52,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:52,508 INFO L93 Difference]: Finished difference Result 229 states and 261 transitions. [2018-09-26 21:21:52,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-26 21:21:52,508 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 175 [2018-09-26 21:21:52,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:52,510 INFO L225 Difference]: With dead ends: 229 [2018-09-26 21:21:52,510 INFO L226 Difference]: Without dead ends: 183 [2018-09-26 21:21:52,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-26 21:21:52,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-26 21:21:52,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2018-09-26 21:21:52,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-09-26 21:21:52,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 197 transitions. [2018-09-26 21:21:52,517 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 197 transitions. Word has length 175 [2018-09-26 21:21:52,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:52,517 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 197 transitions. [2018-09-26 21:21:52,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-26 21:21:52,517 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 197 transitions. [2018-09-26 21:21:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-09-26 21:21:52,518 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:52,518 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 44, 15, 1, 1, 1] [2018-09-26 21:21:52,519 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:52,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:52,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1003346330, now seen corresponding path program 43 times [2018-09-26 21:21:52,519 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:52,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:52,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:52,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:52,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 1980 proven. 2970 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-09-26 21:21:53,337 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:53,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:53,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:53,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:53,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 1980 proven. 2970 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-09-26 21:21:53,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:53,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-26 21:21:53,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:21:53,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:21:53,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:21:53,439 INFO L87 Difference]: Start difference. First operand 182 states and 197 transitions. Second operand 47 states. [2018-09-26 21:21:53,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:53,609 INFO L93 Difference]: Finished difference Result 234 states and 265 transitions. [2018-09-26 21:21:53,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:21:53,609 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 181 [2018-09-26 21:21:53,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:53,610 INFO L225 Difference]: With dead ends: 234 [2018-09-26 21:21:53,611 INFO L226 Difference]: Without dead ends: 185 [2018-09-26 21:21:53,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 181 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 21:21:53,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-26 21:21:53,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-26 21:21:53,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-26 21:21:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 200 transitions. [2018-09-26 21:21:53,620 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 200 transitions. Word has length 181 [2018-09-26 21:21:53,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:53,620 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 200 transitions. [2018-09-26 21:21:53,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:21:53,620 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 200 transitions. [2018-09-26 21:21:53,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-26 21:21:53,621 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:53,621 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 45, 15, 1, 1, 1] [2018-09-26 21:21:53,622 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:53,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:53,622 INFO L82 PathProgramCache]: Analyzing trace with hash 2030680581, now seen corresponding path program 44 times [2018-09-26 21:21:53,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:53,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:53,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:53,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:53,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 2024 proven. 3105 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-09-26 21:21:55,428 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:55,428 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 21:21:55,436 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:55,479 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:55,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:55,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:55,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 2024 proven. 3105 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-09-26 21:21:55,550 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:55,550 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-26 21:21:55,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:21:55,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:21:55,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:21:55,552 INFO L87 Difference]: Start difference. First operand 185 states and 200 transitions. Second operand 48 states. [2018-09-26 21:21:56,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:56,708 INFO L93 Difference]: Finished difference Result 237 states and 268 transitions. [2018-09-26 21:21:56,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:21:56,709 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 184 [2018-09-26 21:21:56,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:56,710 INFO L225 Difference]: With dead ends: 237 [2018-09-26 21:21:56,710 INFO L226 Difference]: Without dead ends: 188 [2018-09-26 21:21:56,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:21:56,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-09-26 21:21:56,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2018-09-26 21:21:56,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-09-26 21:21:56,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 203 transitions. [2018-09-26 21:21:56,717 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 203 transitions. Word has length 184 [2018-09-26 21:21:56,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:56,717 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 203 transitions. [2018-09-26 21:21:56,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:21:56,718 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 203 transitions. [2018-09-26 21:21:56,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-09-26 21:21:56,718 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:56,718 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 46, 15, 1, 1, 1] [2018-09-26 21:21:56,719 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:56,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:56,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1408400826, now seen corresponding path program 45 times [2018-09-26 21:21:56,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:56,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:56,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:56,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:56,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:57,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 2068 proven. 3243 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-09-26 21:21:57,672 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:57,672 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:57,679 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:21:57,713 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-26 21:21:57,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:57,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 2162 proven. 345 refuted. 0 times theorem prover too weak. 3105 trivial. 0 not checked. [2018-09-26 21:21:58,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:58,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 18] total 65 [2018-09-26 21:21:58,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-26 21:21:58,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-26 21:21:58,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:21:58,576 INFO L87 Difference]: Start difference. First operand 188 states and 203 transitions. Second operand 65 states. [2018-09-26 21:21:58,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:58,928 INFO L93 Difference]: Finished difference Result 244 states and 278 transitions. [2018-09-26 21:21:58,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:21:58,929 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 187 [2018-09-26 21:21:58,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:58,930 INFO L225 Difference]: With dead ends: 244 [2018-09-26 21:21:58,930 INFO L226 Difference]: Without dead ends: 195 [2018-09-26 21:21:58,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:21:58,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-26 21:21:58,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2018-09-26 21:21:58,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-09-26 21:21:58,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 210 transitions. [2018-09-26 21:21:58,937 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 210 transitions. Word has length 187 [2018-09-26 21:21:58,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:58,937 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 210 transitions. [2018-09-26 21:21:58,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-26 21:21:58,937 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 210 transitions. [2018-09-26 21:21:58,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-09-26 21:21:58,938 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:58,938 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 47, 16, 1, 1, 1] [2018-09-26 21:21:58,938 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:58,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:58,938 INFO L82 PathProgramCache]: Analyzing trace with hash -622412324, now seen corresponding path program 46 times [2018-09-26 21:21:58,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:58,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:58,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:58,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:58,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:00,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 2256 proven. 3384 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-26 21:22:00,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:00,011 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 21:22:00,022 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:22:00,067 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:22:00,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:00,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 2256 proven. 3384 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-26 21:22:00,167 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:00,167 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-26 21:22:00,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:22:00,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:22:00,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:22:00,168 INFO L87 Difference]: Start difference. First operand 194 states and 210 transitions. Second operand 50 states. [2018-09-26 21:22:00,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:00,577 INFO L93 Difference]: Finished difference Result 249 states and 282 transitions. [2018-09-26 21:22:00,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:22:00,577 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 193 [2018-09-26 21:22:00,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:00,579 INFO L225 Difference]: With dead ends: 249 [2018-09-26 21:22:00,579 INFO L226 Difference]: Without dead ends: 197 [2018-09-26 21:22:00,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:22:00,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-26 21:22:00,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-26 21:22:00,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-26 21:22:00,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 213 transitions. [2018-09-26 21:22:00,586 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 213 transitions. Word has length 193 [2018-09-26 21:22:00,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:00,586 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 213 transitions. [2018-09-26 21:22:00,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:22:00,586 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 213 transitions. [2018-09-26 21:22:00,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-26 21:22:00,587 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:00,587 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 48, 16, 1, 1, 1] [2018-09-26 21:22:00,588 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:00,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:00,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1846957511, now seen corresponding path program 47 times [2018-09-26 21:22:00,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:00,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:00,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:00,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:00,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 2303 proven. 3528 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-26 21:22:01,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:01,665 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 21:22:01,671 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:22:01,779 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2018-09-26 21:22:01,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:01,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 2303 proven. 3528 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-26 21:22:01,836 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:01,837 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-26 21:22:01,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-26 21:22:01,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-26 21:22:01,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:22:01,838 INFO L87 Difference]: Start difference. First operand 197 states and 213 transitions. Second operand 51 states. [2018-09-26 21:22:02,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:02,961 INFO L93 Difference]: Finished difference Result 252 states and 285 transitions. [2018-09-26 21:22:02,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:22:02,961 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 196 [2018-09-26 21:22:02,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:02,963 INFO L225 Difference]: With dead ends: 252 [2018-09-26 21:22:02,963 INFO L226 Difference]: Without dead ends: 200 [2018-09-26 21:22:02,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 196 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 21:22:02,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-09-26 21:22:02,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-09-26 21:22:02,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-09-26 21:22:02,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 216 transitions. [2018-09-26 21:22:02,971 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 216 transitions. Word has length 196 [2018-09-26 21:22:02,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:02,972 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 216 transitions. [2018-09-26 21:22:02,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-26 21:22:02,972 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 216 transitions. [2018-09-26 21:22:02,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-09-26 21:22:02,973 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:02,973 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 49, 16, 1, 1, 1] [2018-09-26 21:22:02,974 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:02,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:02,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1651101188, now seen corresponding path program 48 times [2018-09-26 21:22:02,974 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:02,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:02,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:02,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:02,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:02,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 2350 proven. 3675 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-26 21:22:04,608 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:04,608 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 21:22:04,615 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:22:04,695 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2018-09-26 21:22:04,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:04,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 2450 proven. 392 refuted. 0 times theorem prover too weak. 3528 trivial. 0 not checked. [2018-09-26 21:22:05,418 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:05,418 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 19] total 69 [2018-09-26 21:22:05,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-26 21:22:05,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-26 21:22:05,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:22:05,420 INFO L87 Difference]: Start difference. First operand 200 states and 216 transitions. Second operand 69 states. [2018-09-26 21:22:05,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:05,855 INFO L93 Difference]: Finished difference Result 259 states and 295 transitions. [2018-09-26 21:22:05,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-26 21:22:05,855 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 199 [2018-09-26 21:22:05,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:05,857 INFO L225 Difference]: With dead ends: 259 [2018-09-26 21:22:05,857 INFO L226 Difference]: Without dead ends: 207 [2018-09-26 21:22:05,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:22:05,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-26 21:22:05,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2018-09-26 21:22:05,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-09-26 21:22:05,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 223 transitions. [2018-09-26 21:22:05,864 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 223 transitions. Word has length 199 [2018-09-26 21:22:05,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:05,865 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 223 transitions. [2018-09-26 21:22:05,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-26 21:22:05,865 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 223 transitions. [2018-09-26 21:22:05,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-09-26 21:22:05,866 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:05,866 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 50, 17, 1, 1, 1] [2018-09-26 21:22:05,866 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:05,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:05,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1403567398, now seen corresponding path program 49 times [2018-09-26 21:22:05,867 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:05,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:05,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:05,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:05,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:05,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 2832 proven. 551 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2018-09-26 21:22:06,205 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:06,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:22:06,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:06,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:07,982 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:07,982 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 69] total 72 [2018-09-26 21:22:07,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-26 21:22:07,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-26 21:22:07,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:22:07,983 INFO L87 Difference]: Start difference. First operand 206 states and 223 transitions. Second operand 72 states. [2018-09-26 21:22:08,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:08,388 INFO L93 Difference]: Finished difference Result 218 states and 241 transitions. [2018-09-26 21:22:08,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-26 21:22:08,389 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 205 [2018-09-26 21:22:08,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:08,391 INFO L225 Difference]: With dead ends: 218 [2018-09-26 21:22:08,391 INFO L226 Difference]: Without dead ends: 216 [2018-09-26 21:22:08,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:22:08,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-09-26 21:22:08,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2018-09-26 21:22:08,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-26 21:22:08,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 235 transitions. [2018-09-26 21:22:08,399 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 235 transitions. Word has length 205 [2018-09-26 21:22:08,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:08,400 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 235 transitions. [2018-09-26 21:22:08,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-26 21:22:08,400 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 235 transitions. [2018-09-26 21:22:08,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-26 21:22:08,401 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:08,401 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 50, 20, 1, 1, 1] [2018-09-26 21:22:08,402 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:08,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:08,402 INFO L82 PathProgramCache]: Analyzing trace with hash 29832167, now seen corresponding path program 50 times [2018-09-26 21:22:08,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:08,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:08,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:08,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:08,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 3264 proven. 737 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2018-09-26 21:22:08,749 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:08,749 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 21:22:08,756 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:22:08,806 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:22:08,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:08,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:10,810 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:10,811 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 72] total 75 [2018-09-26 21:22:10,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-26 21:22:10,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-26 21:22:10,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-26 21:22:10,812 INFO L87 Difference]: Start difference. First operand 215 states and 235 transitions. Second operand 75 states. [2018-09-26 21:22:11,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:11,167 INFO L93 Difference]: Finished difference Result 227 states and 253 transitions. [2018-09-26 21:22:11,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-26 21:22:11,167 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 214 [2018-09-26 21:22:11,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:11,169 INFO L225 Difference]: With dead ends: 227 [2018-09-26 21:22:11,169 INFO L226 Difference]: Without dead ends: 225 [2018-09-26 21:22:11,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2200 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-26 21:22:11,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-09-26 21:22:11,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2018-09-26 21:22:11,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-09-26 21:22:11,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 247 transitions. [2018-09-26 21:22:11,178 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 247 transitions. Word has length 214 [2018-09-26 21:22:11,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:11,179 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 247 transitions. [2018-09-26 21:22:11,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-26 21:22:11,179 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 247 transitions. [2018-09-26 21:22:11,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-09-26 21:22:11,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:11,180 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 50, 23, 1, 1, 1] [2018-09-26 21:22:11,181 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:11,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:11,181 INFO L82 PathProgramCache]: Analyzing trace with hash -462347910, now seen corresponding path program 51 times [2018-09-26 21:22:11,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:11,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:11,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:11,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:11,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:11,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 3696 proven. 950 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2018-09-26 21:22:11,989 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:11,990 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 21:22:11,998 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:22:12,061 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-26 21:22:12,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:12,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:12,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 3550 proven. 805 refuted. 0 times theorem prover too weak. 3675 trivial. 0 not checked. [2018-09-26 21:22:12,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:12,130 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 28 [2018-09-26 21:22:12,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:22:12,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:22:12,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:22:12,131 INFO L87 Difference]: Start difference. First operand 224 states and 247 transitions. Second operand 28 states. [2018-09-26 21:22:12,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:12,412 INFO L93 Difference]: Finished difference Result 236 states and 265 transitions. [2018-09-26 21:22:12,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:22:12,413 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 223 [2018-09-26 21:22:12,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:12,414 INFO L225 Difference]: With dead ends: 236 [2018-09-26 21:22:12,415 INFO L226 Difference]: Without dead ends: 234 [2018-09-26 21:22:12,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:22:12,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-09-26 21:22:12,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2018-09-26 21:22:12,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-09-26 21:22:12,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 259 transitions. [2018-09-26 21:22:12,422 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 259 transitions. Word has length 223 [2018-09-26 21:22:12,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:12,422 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 259 transitions. [2018-09-26 21:22:12,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:22:12,422 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 259 transitions. [2018-09-26 21:22:12,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-09-26 21:22:12,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:12,423 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 50, 26, 1, 1, 1] [2018-09-26 21:22:12,423 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:12,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:12,423 INFO L82 PathProgramCache]: Analyzing trace with hash 869124423, now seen corresponding path program 52 times [2018-09-26 21:22:12,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:12,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:12,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:12,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:12,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 4128 proven. 1190 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2018-09-26 21:22:12,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:12,866 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 21:22:12,873 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:22:12,928 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:22:12,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:12,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:13,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:13,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 78] total 81 [2018-09-26 21:22:13,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-26 21:22:13,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-26 21:22:13,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-26 21:22:13,943 INFO L87 Difference]: Start difference. First operand 233 states and 259 transitions. Second operand 81 states. [2018-09-26 21:22:14,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:14,642 INFO L93 Difference]: Finished difference Result 245 states and 277 transitions. [2018-09-26 21:22:14,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-26 21:22:14,643 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 232 [2018-09-26 21:22:14,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:14,644 INFO L225 Difference]: With dead ends: 245 [2018-09-26 21:22:14,644 INFO L226 Difference]: Without dead ends: 243 [2018-09-26 21:22:14,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2800 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-26 21:22:14,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-26 21:22:14,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 242. [2018-09-26 21:22:14,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-09-26 21:22:14,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 271 transitions. [2018-09-26 21:22:14,650 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 271 transitions. Word has length 232 [2018-09-26 21:22:14,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:14,651 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 271 transitions. [2018-09-26 21:22:14,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-26 21:22:14,651 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 271 transitions. [2018-09-26 21:22:14,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-09-26 21:22:14,652 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:14,652 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 50, 29, 1, 1, 1] [2018-09-26 21:22:14,653 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:14,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:14,653 INFO L82 PathProgramCache]: Analyzing trace with hash -208889830, now seen corresponding path program 53 times [2018-09-26 21:22:14,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:14,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:14,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:14,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:14,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:14,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 4560 proven. 1457 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2018-09-26 21:22:15,151 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:15,151 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:22:15,159 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:22:15,630 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 80 check-sat command(s) [2018-09-26 21:22:15,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:15,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 4470 proven. 3626 refuted. 0 times theorem prover too weak. 1305 trivial. 0 not checked. [2018-09-26 21:22:16,335 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:16,335 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 52] total 52 [2018-09-26 21:22:16,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:22:16,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:22:16,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:22:16,336 INFO L87 Difference]: Start difference. First operand 242 states and 271 transitions. Second operand 52 states. [2018-09-26 21:22:16,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:16,833 INFO L93 Difference]: Finished difference Result 307 states and 377 transitions. [2018-09-26 21:22:16,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:22:16,833 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 241 [2018-09-26 21:22:16,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:16,835 INFO L225 Difference]: With dead ends: 307 [2018-09-26 21:22:16,835 INFO L226 Difference]: Without dead ends: 305 [2018-09-26 21:22:16,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:22:16,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2018-09-26 21:22:16,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2018-09-26 21:22:16,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2018-09-26 21:22:16,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 355 transitions. [2018-09-26 21:22:16,845 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 355 transitions. Word has length 241 [2018-09-26 21:22:16,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:16,845 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 355 transitions. [2018-09-26 21:22:16,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:22:16,846 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 355 transitions. [2018-09-26 21:22:16,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-09-26 21:22:16,847 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:16,848 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 50, 50, 1, 1, 1] [2018-09-26 21:22:16,848 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:16,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:16,848 INFO L82 PathProgramCache]: Analyzing trace with hash 602025671, now seen corresponding path program 54 times [2018-09-26 21:22:16,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:16,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:16,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:16,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:16,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:16,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 0 proven. 11225 refuted. 0 times theorem prover too weak. 3825 trivial. 0 not checked. [2018-09-26 21:22:19,465 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:19,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:22:19,474 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:22:19,787 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 101 check-sat command(s) [2018-09-26 21:22:19,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:19,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:20,238 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 0 proven. 11225 refuted. 0 times theorem prover too weak. 3825 trivial. 0 not checked. [2018-09-26 21:22:20,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:20,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-26 21:22:20,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:22:20,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:22:20,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:22:20,260 INFO L87 Difference]: Start difference. First operand 305 states and 355 transitions. Second operand 53 states. [2018-09-26 21:22:22,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:22,728 INFO L93 Difference]: Finished difference Result 4284 states and 5659 transitions. [2018-09-26 21:22:22,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:22:22,728 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 304 [2018-09-26 21:22:22,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:22,743 INFO L225 Difference]: With dead ends: 4284 [2018-09-26 21:22:22,744 INFO L226 Difference]: Without dead ends: 4282 [2018-09-26 21:22:22,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 302 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:22:22,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4282 states. [2018-09-26 21:22:22,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4282 to 308. [2018-09-26 21:22:22,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2018-09-26 21:22:22,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 359 transitions. [2018-09-26 21:22:22,937 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 359 transitions. Word has length 304 [2018-09-26 21:22:22,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:22,938 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 359 transitions. [2018-09-26 21:22:22,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:22:22,938 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 359 transitions. [2018-09-26 21:22:22,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-09-26 21:22:22,939 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:22,940 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 51, 50, 1, 1, 1] [2018-09-26 21:22:22,940 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:22,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:22,940 INFO L82 PathProgramCache]: Analyzing trace with hash -834605638, now seen corresponding path program 55 times [2018-09-26 21:22:22,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:22,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:22,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:22,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:22,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 15352 backedges. 11527 proven. 0 refuted. 0 times theorem prover too weak. 3825 trivial. 0 not checked. [2018-09-26 21:22:24,534 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:22:24,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2018-09-26 21:22:24,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:22:24,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:22:24,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:22:24,535 INFO L87 Difference]: Start difference. First operand 308 states and 359 transitions. Second operand 52 states. [2018-09-26 21:22:24,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:24,916 INFO L93 Difference]: Finished difference Result 457 states and 557 transitions. [2018-09-26 21:22:24,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:22:24,917 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 307 [2018-09-26 21:22:24,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:24,918 INFO L225 Difference]: With dead ends: 457 [2018-09-26 21:22:24,918 INFO L226 Difference]: Without dead ends: 0 [2018-09-26 21:22:24,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:22:24,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-09-26 21:22:24,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-09-26 21:22:24,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-09-26 21:22:24,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-09-26 21:22:24,920 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 307 [2018-09-26 21:22:24,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:24,920 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-09-26 21:22:24,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:22:24,920 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-09-26 21:22:24,920 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-09-26 21:22:24,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-09-26 21:22:25,721 WARN L178 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 1832 DAG size of output: 407 [2018-09-26 21:22:26,372 WARN L178 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 1827 DAG size of output: 400 [2018-09-26 21:22:26,901 WARN L178 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 1832 DAG size of output: 407 [2018-09-26 21:22:31,920 WARN L178 SmtUtils]: Spent 4.99 s on a formula simplification. DAG size of input: 407 DAG size of output: 357 [2018-09-26 21:22:33,560 WARN L178 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 400 DAG size of output: 351 [2018-09-26 21:22:35,341 WARN L178 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 407 DAG size of output: 357 [2018-09-26 21:22:35,346 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 43) no Hoare annotation was computed. [2018-09-26 21:22:35,347 INFO L422 ceAbstractionStarter]: At program point L32(lines 29 38) the Hoare annotation is: (or (and (and (<= ULTIMATE.start_main_~y~4 96) (<= 96 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 96)) (<= 96 ULTIMATE.start_main_~x~4)) (and (<= 79 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 79) (<= 79 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 79))) (and (and (<= ULTIMATE.start_main_~y~4 97) (<= ULTIMATE.start_main_~x~4 97) (<= 97 ULTIMATE.start_main_~y~4)) (<= 97 ULTIMATE.start_main_~x~4)) (and (and (<= 95 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 95) (<= ULTIMATE.start_main_~x~4 95)) (<= 95 ULTIMATE.start_main_~x~4)) (and (and (<= 91 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 91) (<= ULTIMATE.start_main_~y~4 91)) (<= 91 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 72) (<= 72 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 72)) (<= 72 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 62) (<= 62 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 62)) (<= 62 ULTIMATE.start_main_~x~4)) (and (<= 54 ULTIMATE.start_main_~x~4) (and (<= 54 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 54) (<= ULTIMATE.start_main_~y~4 54))) (and (<= 60 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 60) (<= ULTIMATE.start_main_~x~4 60) (<= 60 ULTIMATE.start_main_~y~4))) (and (<= 98 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 98) (<= ULTIMATE.start_main_~y~4 98) (<= 98 ULTIMATE.start_main_~y~4))) (and (and (<= 88 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 88) (<= ULTIMATE.start_main_~x~4 88)) (<= 88 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 73) (<= 73 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 73)) (<= 73 ULTIMATE.start_main_~x~4)) (and (<= 64 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 64) (<= 64 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 64))) (and (and (<= ULTIMATE.start_main_~x~4 76) (<= 76 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 76)) (<= 76 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~y~4 84) (<= ULTIMATE.start_main_~x~4 84) (<= 84 ULTIMATE.start_main_~y~4)) (<= 84 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~y~4 85) (<= 85 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 85)) (<= 85 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 61) (<= 61 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 61)) (<= 61 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 59) (<= ULTIMATE.start_main_~y~4 59) (<= 59 ULTIMATE.start_main_~y~4)) (<= 59 ULTIMATE.start_main_~x~4)) (and (<= 69 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 69) (<= ULTIMATE.start_main_~x~4 69) (<= 69 ULTIMATE.start_main_~y~4))) (and (and (<= 55 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 55) (<= ULTIMATE.start_main_~x~4 55)) (<= 55 ULTIMATE.start_main_~x~4)) (and (and (<= 99 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 99) (<= ULTIMATE.start_main_~x~4 99)) (<= 99 ULTIMATE.start_main_~x~4)) (and (<= 53 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 53) (<= ULTIMATE.start_main_~y~4 53) (<= 53 ULTIMATE.start_main_~y~4))) (and (<= 77 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 77) (<= ULTIMATE.start_main_~y~4 77) (<= 77 ULTIMATE.start_main_~y~4))) (and (<= 89 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 89) (<= ULTIMATE.start_main_~x~4 89) (<= 89 ULTIMATE.start_main_~y~4))) (and (<= 94 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 94) (<= ULTIMATE.start_main_~x~4 94) (<= 94 ULTIMATE.start_main_~y~4))) (and (and (<= ULTIMATE.start_main_~y~4 93) (<= 93 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 93)) (<= 93 ULTIMATE.start_main_~x~4)) (and (<= 68 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 68) (<= ULTIMATE.start_main_~y~4 68) (<= 68 ULTIMATE.start_main_~y~4))) (and (and (<= ULTIMATE.start_main_~y~4 81) (<= ULTIMATE.start_main_~x~4 81) (<= 81 ULTIMATE.start_main_~y~4)) (<= 81 ULTIMATE.start_main_~x~4)) (and (and (<= 57 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 57) (<= ULTIMATE.start_main_~x~4 57)) (<= 57 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 82) (<= 82 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 82)) (<= 82 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~y~4 58) (<= ULTIMATE.start_main_~x~4 58) (<= 58 ULTIMATE.start_main_~y~4)) (<= 58 ULTIMATE.start_main_~x~4)) (and (<= 78 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 78) (<= 78 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 78))) (and (and (<= ULTIMATE.start_main_~y~4 65) (<= ULTIMATE.start_main_~x~4 65) (<= 65 ULTIMATE.start_main_~y~4)) (<= 65 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 90) (<= 90 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 90)) (<= 90 ULTIMATE.start_main_~x~4)) (and (<= 63 ULTIMATE.start_main_~x~4) (and (<= 63 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 63) (<= ULTIMATE.start_main_~x~4 63))) (and (<= 51 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 51) (<= 51 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 51))) (and (<= 52 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 52) (<= 52 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 52))) (and (and (<= 74 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 74) (<= ULTIMATE.start_main_~y~4 74)) (<= 74 ULTIMATE.start_main_~x~4)) (and (<= 86 ULTIMATE.start_main_~x~4) (and (<= 86 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 86) (<= ULTIMATE.start_main_~x~4 86))) (and (<= 56 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 56) (<= ULTIMATE.start_main_~x~4 56) (<= 56 ULTIMATE.start_main_~y~4))) (and (<= 67 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 67) (<= 67 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 67))) (and (<= 83 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 83) (<= 83 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 83))) (and (and (<= ULTIMATE.start_main_~x~4 87) (<= 87 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 87)) (<= 87 ULTIMATE.start_main_~x~4)) (and (<= 66 ULTIMATE.start_main_~x~4) (and (<= 66 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 66) (<= ULTIMATE.start_main_~x~4 66))) (and (and (<= 80 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 80) (<= ULTIMATE.start_main_~y~4 80)) (<= 80 ULTIMATE.start_main_~x~4)) (and (<= 70 ULTIMATE.start_main_~x~4) (and (<= 70 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 70) (<= ULTIMATE.start_main_~y~4 70))) (and (<= 71 ULTIMATE.start_main_~x~4) (and (<= 71 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 71) (<= ULTIMATE.start_main_~y~4 71))) (and (and (<= ULTIMATE.start_main_~x~4 75) (<= ULTIMATE.start_main_~y~4 75) (<= 75 ULTIMATE.start_main_~y~4)) (<= 75 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 50) (<= ULTIMATE.start_main_~y~4 50) (<= 50 ULTIMATE.start_main_~y~4)) (and (and (<= ULTIMATE.start_main_~x~4 92) (<= 92 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 92)) (<= 92 ULTIMATE.start_main_~x~4))) [2018-09-26 21:22:35,347 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 1 43) no Hoare annotation was computed. [2018-09-26 21:22:35,347 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 43) no Hoare annotation was computed. [2018-09-26 21:22:35,348 INFO L422 ceAbstractionStarter]: At program point L26(lines 26 30) the Hoare annotation is: false [2018-09-26 21:22:35,348 INFO L422 ceAbstractionStarter]: At program point L16(lines 16 27) the Hoare annotation is: (or (and (and (<= ULTIMATE.start_main_~y~4 96) (<= 96 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 96)) (<= 96 ULTIMATE.start_main_~x~4)) (and (<= 79 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 79) (<= 79 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 79))) (and (and (<= ULTIMATE.start_main_~y~4 97) (<= ULTIMATE.start_main_~x~4 97) (<= 97 ULTIMATE.start_main_~y~4)) (<= 97 ULTIMATE.start_main_~x~4)) (and (and (<= 95 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 95) (<= ULTIMATE.start_main_~x~4 95)) (<= 95 ULTIMATE.start_main_~x~4)) (and (and (<= 91 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 91) (<= ULTIMATE.start_main_~y~4 91)) (<= 91 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 72) (<= 72 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 72)) (<= 72 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 62) (<= 62 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 62)) (<= 62 ULTIMATE.start_main_~x~4)) (and (<= 54 ULTIMATE.start_main_~x~4) (and (<= 54 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 54) (<= ULTIMATE.start_main_~y~4 54))) (and (<= 60 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 60) (<= ULTIMATE.start_main_~x~4 60) (<= 60 ULTIMATE.start_main_~y~4))) (and (<= 98 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 98) (<= ULTIMATE.start_main_~y~4 98) (<= 98 ULTIMATE.start_main_~y~4))) (and (and (<= 88 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 88) (<= ULTIMATE.start_main_~x~4 88)) (<= 88 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 73) (<= 73 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 73)) (<= 73 ULTIMATE.start_main_~x~4)) (and (<= 64 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 64) (<= 64 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 64))) (and (and (<= ULTIMATE.start_main_~x~4 76) (<= 76 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 76)) (<= 76 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~y~4 84) (<= ULTIMATE.start_main_~x~4 84) (<= 84 ULTIMATE.start_main_~y~4)) (<= 84 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~y~4 85) (<= 85 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 85)) (<= 85 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 61) (<= 61 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 61)) (<= 61 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 59) (<= ULTIMATE.start_main_~y~4 59) (<= 59 ULTIMATE.start_main_~y~4)) (<= 59 ULTIMATE.start_main_~x~4)) (and (<= 69 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 69) (<= ULTIMATE.start_main_~x~4 69) (<= 69 ULTIMATE.start_main_~y~4))) (and (and (<= 55 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 55) (<= ULTIMATE.start_main_~x~4 55)) (<= 55 ULTIMATE.start_main_~x~4)) (and (and (<= 99 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 99) (<= ULTIMATE.start_main_~x~4 99)) (<= 99 ULTIMATE.start_main_~x~4)) (and (<= 53 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 53) (<= ULTIMATE.start_main_~y~4 53) (<= 53 ULTIMATE.start_main_~y~4))) (and (<= 77 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 77) (<= ULTIMATE.start_main_~y~4 77) (<= 77 ULTIMATE.start_main_~y~4))) (and (<= 89 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 89) (<= ULTIMATE.start_main_~x~4 89) (<= 89 ULTIMATE.start_main_~y~4))) (and (<= 94 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 94) (<= ULTIMATE.start_main_~x~4 94) (<= 94 ULTIMATE.start_main_~y~4))) (and (and (<= ULTIMATE.start_main_~y~4 93) (<= 93 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 93)) (<= 93 ULTIMATE.start_main_~x~4)) (and (<= 68 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 68) (<= ULTIMATE.start_main_~y~4 68) (<= 68 ULTIMATE.start_main_~y~4))) (and (and (<= ULTIMATE.start_main_~y~4 81) (<= ULTIMATE.start_main_~x~4 81) (<= 81 ULTIMATE.start_main_~y~4)) (<= 81 ULTIMATE.start_main_~x~4)) (and (and (<= 57 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 57) (<= ULTIMATE.start_main_~x~4 57)) (<= 57 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 82) (<= 82 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 82)) (<= 82 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~y~4 58) (<= ULTIMATE.start_main_~x~4 58) (<= 58 ULTIMATE.start_main_~y~4)) (<= 58 ULTIMATE.start_main_~x~4)) (and (<= 78 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 78) (<= 78 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 78))) (and (and (<= ULTIMATE.start_main_~y~4 65) (<= ULTIMATE.start_main_~x~4 65) (<= 65 ULTIMATE.start_main_~y~4)) (<= 65 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 90) (<= 90 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 90)) (<= 90 ULTIMATE.start_main_~x~4)) (and (<= 63 ULTIMATE.start_main_~x~4) (and (<= 63 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 63) (<= ULTIMATE.start_main_~x~4 63))) (and (<= 51 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 51) (<= 51 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 51))) (and (<= 52 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 52) (<= 52 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 52))) (and (and (<= 74 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 74) (<= ULTIMATE.start_main_~y~4 74)) (<= 74 ULTIMATE.start_main_~x~4)) (and (<= 86 ULTIMATE.start_main_~x~4) (and (<= 86 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 86) (<= ULTIMATE.start_main_~x~4 86))) (and (<= 56 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 56) (<= ULTIMATE.start_main_~x~4 56) (<= 56 ULTIMATE.start_main_~y~4))) (and (<= 67 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 67) (<= 67 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 67))) (and (<= 83 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 83) (<= 83 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 83))) (and (and (<= ULTIMATE.start_main_~x~4 87) (<= 87 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 87)) (<= 87 ULTIMATE.start_main_~x~4)) (and (<= 66 ULTIMATE.start_main_~x~4) (and (<= 66 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 66) (<= ULTIMATE.start_main_~x~4 66))) (and (and (<= 80 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 80) (<= ULTIMATE.start_main_~y~4 80)) (<= 80 ULTIMATE.start_main_~x~4)) (and (<= 70 ULTIMATE.start_main_~x~4) (and (<= 70 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 70) (<= ULTIMATE.start_main_~y~4 70))) (and (<= 71 ULTIMATE.start_main_~x~4) (and (<= 71 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 71) (<= ULTIMATE.start_main_~y~4 71))) (and (and (<= ULTIMATE.start_main_~x~4 75) (<= ULTIMATE.start_main_~y~4 75) (<= 75 ULTIMATE.start_main_~y~4)) (<= 75 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~y~4 100) (< 99 ULTIMATE.start_main_~y~4)) (<= 100 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 50) (<= ULTIMATE.start_main_~y~4 50) (<= 50 ULTIMATE.start_main_~y~4)) (and (and (<= ULTIMATE.start_main_~x~4 92) (<= 92 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 92)) (<= 92 ULTIMATE.start_main_~x~4))) [2018-09-26 21:22:35,349 INFO L422 ceAbstractionStarter]: At program point L42(lines 13 42) the Hoare annotation is: (or (and (and (<= ULTIMATE.start_main_~y~4 96) (<= 96 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 96)) (<= 96 ULTIMATE.start_main_~x~4)) (and (<= 79 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 79) (<= 79 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 79))) (and (and (<= ULTIMATE.start_main_~y~4 97) (<= ULTIMATE.start_main_~x~4 97) (<= 97 ULTIMATE.start_main_~y~4)) (<= 97 ULTIMATE.start_main_~x~4)) (and (and (<= 95 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 95) (<= ULTIMATE.start_main_~x~4 95)) (<= 95 ULTIMATE.start_main_~x~4)) (and (and (<= 91 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 91) (<= ULTIMATE.start_main_~y~4 91)) (<= 91 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 72) (<= 72 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 72)) (<= 72 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 62) (<= 62 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 62)) (<= 62 ULTIMATE.start_main_~x~4)) (and (<= 54 ULTIMATE.start_main_~x~4) (and (<= 54 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 54) (<= ULTIMATE.start_main_~y~4 54))) (and (<= 60 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 60) (<= ULTIMATE.start_main_~x~4 60) (<= 60 ULTIMATE.start_main_~y~4))) (and (<= 98 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 98) (<= ULTIMATE.start_main_~y~4 98) (<= 98 ULTIMATE.start_main_~y~4))) (and (and (<= 88 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 88) (<= ULTIMATE.start_main_~x~4 88)) (<= 88 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 73) (<= 73 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 73)) (<= 73 ULTIMATE.start_main_~x~4)) (and (<= 64 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 64) (<= 64 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 64))) (and (and (<= ULTIMATE.start_main_~x~4 76) (<= 76 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 76)) (<= 76 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~y~4 84) (<= ULTIMATE.start_main_~x~4 84) (<= 84 ULTIMATE.start_main_~y~4)) (<= 84 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~y~4 85) (<= 85 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 85)) (<= 85 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 61) (<= 61 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 61)) (<= 61 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 59) (<= ULTIMATE.start_main_~y~4 59) (<= 59 ULTIMATE.start_main_~y~4)) (<= 59 ULTIMATE.start_main_~x~4)) (and (<= 69 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 69) (<= ULTIMATE.start_main_~x~4 69) (<= 69 ULTIMATE.start_main_~y~4))) (and (and (<= 55 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 55) (<= ULTIMATE.start_main_~x~4 55)) (<= 55 ULTIMATE.start_main_~x~4)) (and (and (<= 99 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 99) (<= ULTIMATE.start_main_~x~4 99)) (<= 99 ULTIMATE.start_main_~x~4)) (and (<= 53 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 53) (<= ULTIMATE.start_main_~y~4 53) (<= 53 ULTIMATE.start_main_~y~4))) (and (<= 77 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 77) (<= ULTIMATE.start_main_~y~4 77) (<= 77 ULTIMATE.start_main_~y~4))) (and (<= 89 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 89) (<= ULTIMATE.start_main_~x~4 89) (<= 89 ULTIMATE.start_main_~y~4))) (and (<= 94 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 94) (<= ULTIMATE.start_main_~x~4 94) (<= 94 ULTIMATE.start_main_~y~4))) (and (and (<= ULTIMATE.start_main_~y~4 93) (<= 93 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 93)) (<= 93 ULTIMATE.start_main_~x~4)) (and (<= 68 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 68) (<= ULTIMATE.start_main_~y~4 68) (<= 68 ULTIMATE.start_main_~y~4))) (and (and (<= ULTIMATE.start_main_~y~4 81) (<= ULTIMATE.start_main_~x~4 81) (<= 81 ULTIMATE.start_main_~y~4)) (<= 81 ULTIMATE.start_main_~x~4)) (and (and (<= 57 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 57) (<= ULTIMATE.start_main_~x~4 57)) (<= 57 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 82) (<= 82 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 82)) (<= 82 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~y~4 58) (<= ULTIMATE.start_main_~x~4 58) (<= 58 ULTIMATE.start_main_~y~4)) (<= 58 ULTIMATE.start_main_~x~4)) (and (<= 78 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 78) (<= 78 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 78))) (and (and (<= ULTIMATE.start_main_~y~4 65) (<= ULTIMATE.start_main_~x~4 65) (<= 65 ULTIMATE.start_main_~y~4)) (<= 65 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~x~4 90) (<= 90 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 90)) (<= 90 ULTIMATE.start_main_~x~4)) (and (<= 63 ULTIMATE.start_main_~x~4) (and (<= 63 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 63) (<= ULTIMATE.start_main_~x~4 63))) (and (<= 51 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 51) (<= 51 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 51))) (and (<= 52 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~x~4 52) (<= 52 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 52))) (and (and (<= 74 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 74) (<= ULTIMATE.start_main_~y~4 74)) (<= 74 ULTIMATE.start_main_~x~4)) (and (<= 86 ULTIMATE.start_main_~x~4) (and (<= 86 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 86) (<= ULTIMATE.start_main_~x~4 86))) (and (<= 56 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 56) (<= ULTIMATE.start_main_~x~4 56) (<= 56 ULTIMATE.start_main_~y~4))) (and (<= 67 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 67) (<= 67 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 67))) (and (<= 83 ULTIMATE.start_main_~x~4) (and (<= ULTIMATE.start_main_~y~4 83) (<= 83 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 83))) (and (and (<= ULTIMATE.start_main_~x~4 87) (<= 87 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 87)) (<= 87 ULTIMATE.start_main_~x~4)) (and (<= 66 ULTIMATE.start_main_~x~4) (and (<= 66 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 66) (<= ULTIMATE.start_main_~x~4 66))) (and (and (<= 80 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 80) (<= ULTIMATE.start_main_~y~4 80)) (<= 80 ULTIMATE.start_main_~x~4)) (and (<= 70 ULTIMATE.start_main_~x~4) (and (<= 70 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 70) (<= ULTIMATE.start_main_~y~4 70))) (and (<= 71 ULTIMATE.start_main_~x~4) (and (<= 71 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~x~4 71) (<= ULTIMATE.start_main_~y~4 71))) (and (and (<= ULTIMATE.start_main_~x~4 75) (<= ULTIMATE.start_main_~y~4 75) (<= 75 ULTIMATE.start_main_~y~4)) (<= 75 ULTIMATE.start_main_~x~4)) (and (and (<= ULTIMATE.start_main_~y~4 100) (< 99 ULTIMATE.start_main_~y~4)) (<= 100 ULTIMATE.start_main_~x~4)) (and (<= ULTIMATE.start_main_~x~4 50) (<= ULTIMATE.start_main_~y~4 50) (<= 50 ULTIMATE.start_main_~y~4)) (and (and (<= ULTIMATE.start_main_~x~4 92) (<= 92 ULTIMATE.start_main_~y~4) (<= ULTIMATE.start_main_~y~4 92)) (<= 92 ULTIMATE.start_main_~x~4))) [2018-09-26 21:22:35,349 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 31) no Hoare annotation was computed. [2018-09-26 21:22:35,379 INFO L202 PluginConnector]: Adding new model gj2007.c.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:22:35 BoogieIcfgContainer [2018-09-26 21:22:35,380 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:22:35,380 INFO L168 Benchmark]: Toolchain (without parser) took 88264.11 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 684.7 MB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 118.4 kB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-09-26 21:22:35,381 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:22:35,382 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.36 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 21:22:35,382 INFO L168 Benchmark]: Boogie Preprocessor took 19.81 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 21:22:35,383 INFO L168 Benchmark]: RCFGBuilder took 300.75 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 21:22:35,383 INFO L168 Benchmark]: TraceAbstraction took 87897.06 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 684.7 MB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -21.0 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-09-26 21:22:35,386 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 0.14 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.36 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 19.81 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 300.75 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 87897.06 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 684.7 MB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -21.0 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 31]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((main_~y~4 <= 96 && 96 <= main_~y~4) && main_~x~4 <= 96) && 96 <= main_~x~4) || (79 <= main_~x~4 && (main_~y~4 <= 79 && 79 <= main_~y~4) && main_~x~4 <= 79)) || (((main_~y~4 <= 97 && main_~x~4 <= 97) && 97 <= main_~y~4) && 97 <= main_~x~4)) || (((95 <= main_~y~4 && main_~y~4 <= 95) && main_~x~4 <= 95) && 95 <= main_~x~4)) || (((91 <= main_~y~4 && main_~x~4 <= 91) && main_~y~4 <= 91) && 91 <= main_~x~4)) || (((main_~x~4 <= 72 && 72 <= main_~y~4) && main_~y~4 <= 72) && 72 <= main_~x~4)) || (((main_~x~4 <= 62 && 62 <= main_~y~4) && main_~y~4 <= 62) && 62 <= main_~x~4)) || (54 <= main_~x~4 && (54 <= main_~y~4 && main_~x~4 <= 54) && main_~y~4 <= 54)) || (60 <= main_~x~4 && (main_~y~4 <= 60 && main_~x~4 <= 60) && 60 <= main_~y~4)) || (98 <= main_~x~4 && (main_~x~4 <= 98 && main_~y~4 <= 98) && 98 <= main_~y~4)) || (((88 <= main_~y~4 && main_~y~4 <= 88) && main_~x~4 <= 88) && 88 <= main_~x~4)) || (((main_~x~4 <= 73 && 73 <= main_~y~4) && main_~y~4 <= 73) && 73 <= main_~x~4)) || (64 <= main_~x~4 && (main_~x~4 <= 64 && 64 <= main_~y~4) && main_~y~4 <= 64)) || (((main_~x~4 <= 76 && 76 <= main_~y~4) && main_~y~4 <= 76) && 76 <= main_~x~4)) || (((main_~y~4 <= 84 && main_~x~4 <= 84) && 84 <= main_~y~4) && 84 <= main_~x~4)) || (((main_~y~4 <= 85 && 85 <= main_~y~4) && main_~x~4 <= 85) && 85 <= main_~x~4)) || (((main_~x~4 <= 61 && 61 <= main_~y~4) && main_~y~4 <= 61) && 61 <= main_~x~4)) || (((main_~x~4 <= 59 && main_~y~4 <= 59) && 59 <= main_~y~4) && 59 <= main_~x~4)) || (69 <= main_~x~4 && (main_~y~4 <= 69 && main_~x~4 <= 69) && 69 <= main_~y~4)) || (((55 <= main_~y~4 && main_~y~4 <= 55) && main_~x~4 <= 55) && 55 <= main_~x~4)) || (((99 <= main_~y~4 && main_~y~4 <= 99) && main_~x~4 <= 99) && 99 <= main_~x~4)) || (53 <= main_~x~4 && (main_~x~4 <= 53 && main_~y~4 <= 53) && 53 <= main_~y~4)) || (77 <= main_~x~4 && (main_~x~4 <= 77 && main_~y~4 <= 77) && 77 <= main_~y~4)) || (89 <= main_~x~4 && (main_~y~4 <= 89 && main_~x~4 <= 89) && 89 <= main_~y~4)) || (94 <= main_~x~4 && (main_~y~4 <= 94 && main_~x~4 <= 94) && 94 <= main_~y~4)) || (((main_~y~4 <= 93 && 93 <= main_~y~4) && main_~x~4 <= 93) && 93 <= main_~x~4)) || (68 <= main_~x~4 && (main_~x~4 <= 68 && main_~y~4 <= 68) && 68 <= main_~y~4)) || (((main_~y~4 <= 81 && main_~x~4 <= 81) && 81 <= main_~y~4) && 81 <= main_~x~4)) || (((57 <= main_~y~4 && main_~y~4 <= 57) && main_~x~4 <= 57) && 57 <= main_~x~4)) || (((main_~x~4 <= 82 && 82 <= main_~y~4) && main_~y~4 <= 82) && 82 <= main_~x~4)) || (((main_~y~4 <= 58 && main_~x~4 <= 58) && 58 <= main_~y~4) && 58 <= main_~x~4)) || (78 <= main_~x~4 && (main_~x~4 <= 78 && 78 <= main_~y~4) && main_~y~4 <= 78)) || (((main_~y~4 <= 65 && main_~x~4 <= 65) && 65 <= main_~y~4) && 65 <= main_~x~4)) || (((main_~x~4 <= 90 && 90 <= main_~y~4) && main_~y~4 <= 90) && 90 <= main_~x~4)) || (63 <= main_~x~4 && (63 <= main_~y~4 && main_~y~4 <= 63) && main_~x~4 <= 63)) || (51 <= main_~x~4 && (main_~y~4 <= 51 && 51 <= main_~y~4) && main_~x~4 <= 51)) || (52 <= main_~x~4 && (main_~x~4 <= 52 && 52 <= main_~y~4) && main_~y~4 <= 52)) || (((74 <= main_~y~4 && main_~x~4 <= 74) && main_~y~4 <= 74) && 74 <= main_~x~4)) || (86 <= main_~x~4 && (86 <= main_~y~4 && main_~y~4 <= 86) && main_~x~4 <= 86)) || (56 <= main_~x~4 && (main_~y~4 <= 56 && main_~x~4 <= 56) && 56 <= main_~y~4)) || (67 <= main_~x~4 && (main_~y~4 <= 67 && 67 <= main_~y~4) && main_~x~4 <= 67)) || (83 <= main_~x~4 && (main_~y~4 <= 83 && 83 <= main_~y~4) && main_~x~4 <= 83)) || (((main_~x~4 <= 87 && 87 <= main_~y~4) && main_~y~4 <= 87) && 87 <= main_~x~4)) || (66 <= main_~x~4 && (66 <= main_~y~4 && main_~y~4 <= 66) && main_~x~4 <= 66)) || (((80 <= main_~y~4 && main_~x~4 <= 80) && main_~y~4 <= 80) && 80 <= main_~x~4)) || (70 <= main_~x~4 && (70 <= main_~y~4 && main_~x~4 <= 70) && main_~y~4 <= 70)) || (71 <= main_~x~4 && (71 <= main_~y~4 && main_~x~4 <= 71) && main_~y~4 <= 71)) || (((main_~x~4 <= 75 && main_~y~4 <= 75) && 75 <= main_~y~4) && 75 <= main_~x~4)) || ((main_~y~4 <= 100 && 99 < main_~y~4) && 100 <= main_~x~4)) || ((main_~x~4 <= 50 && main_~y~4 <= 50) && 50 <= main_~y~4)) || (((main_~x~4 <= 92 && 92 <= main_~y~4) && main_~y~4 <= 92) && 92 <= main_~x~4) - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: false - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((main_~y~4 <= 96 && 96 <= main_~y~4) && main_~x~4 <= 96) && 96 <= main_~x~4) || (79 <= main_~x~4 && (main_~y~4 <= 79 && 79 <= main_~y~4) && main_~x~4 <= 79)) || (((main_~y~4 <= 97 && main_~x~4 <= 97) && 97 <= main_~y~4) && 97 <= main_~x~4)) || (((95 <= main_~y~4 && main_~y~4 <= 95) && main_~x~4 <= 95) && 95 <= main_~x~4)) || (((91 <= main_~y~4 && main_~x~4 <= 91) && main_~y~4 <= 91) && 91 <= main_~x~4)) || (((main_~x~4 <= 72 && 72 <= main_~y~4) && main_~y~4 <= 72) && 72 <= main_~x~4)) || (((main_~x~4 <= 62 && 62 <= main_~y~4) && main_~y~4 <= 62) && 62 <= main_~x~4)) || (54 <= main_~x~4 && (54 <= main_~y~4 && main_~x~4 <= 54) && main_~y~4 <= 54)) || (60 <= main_~x~4 && (main_~y~4 <= 60 && main_~x~4 <= 60) && 60 <= main_~y~4)) || (98 <= main_~x~4 && (main_~x~4 <= 98 && main_~y~4 <= 98) && 98 <= main_~y~4)) || (((88 <= main_~y~4 && main_~y~4 <= 88) && main_~x~4 <= 88) && 88 <= main_~x~4)) || (((main_~x~4 <= 73 && 73 <= main_~y~4) && main_~y~4 <= 73) && 73 <= main_~x~4)) || (64 <= main_~x~4 && (main_~x~4 <= 64 && 64 <= main_~y~4) && main_~y~4 <= 64)) || (((main_~x~4 <= 76 && 76 <= main_~y~4) && main_~y~4 <= 76) && 76 <= main_~x~4)) || (((main_~y~4 <= 84 && main_~x~4 <= 84) && 84 <= main_~y~4) && 84 <= main_~x~4)) || (((main_~y~4 <= 85 && 85 <= main_~y~4) && main_~x~4 <= 85) && 85 <= main_~x~4)) || (((main_~x~4 <= 61 && 61 <= main_~y~4) && main_~y~4 <= 61) && 61 <= main_~x~4)) || (((main_~x~4 <= 59 && main_~y~4 <= 59) && 59 <= main_~y~4) && 59 <= main_~x~4)) || (69 <= main_~x~4 && (main_~y~4 <= 69 && main_~x~4 <= 69) && 69 <= main_~y~4)) || (((55 <= main_~y~4 && main_~y~4 <= 55) && main_~x~4 <= 55) && 55 <= main_~x~4)) || (((99 <= main_~y~4 && main_~y~4 <= 99) && main_~x~4 <= 99) && 99 <= main_~x~4)) || (53 <= main_~x~4 && (main_~x~4 <= 53 && main_~y~4 <= 53) && 53 <= main_~y~4)) || (77 <= main_~x~4 && (main_~x~4 <= 77 && main_~y~4 <= 77) && 77 <= main_~y~4)) || (89 <= main_~x~4 && (main_~y~4 <= 89 && main_~x~4 <= 89) && 89 <= main_~y~4)) || (94 <= main_~x~4 && (main_~y~4 <= 94 && main_~x~4 <= 94) && 94 <= main_~y~4)) || (((main_~y~4 <= 93 && 93 <= main_~y~4) && main_~x~4 <= 93) && 93 <= main_~x~4)) || (68 <= main_~x~4 && (main_~x~4 <= 68 && main_~y~4 <= 68) && 68 <= main_~y~4)) || (((main_~y~4 <= 81 && main_~x~4 <= 81) && 81 <= main_~y~4) && 81 <= main_~x~4)) || (((57 <= main_~y~4 && main_~y~4 <= 57) && main_~x~4 <= 57) && 57 <= main_~x~4)) || (((main_~x~4 <= 82 && 82 <= main_~y~4) && main_~y~4 <= 82) && 82 <= main_~x~4)) || (((main_~y~4 <= 58 && main_~x~4 <= 58) && 58 <= main_~y~4) && 58 <= main_~x~4)) || (78 <= main_~x~4 && (main_~x~4 <= 78 && 78 <= main_~y~4) && main_~y~4 <= 78)) || (((main_~y~4 <= 65 && main_~x~4 <= 65) && 65 <= main_~y~4) && 65 <= main_~x~4)) || (((main_~x~4 <= 90 && 90 <= main_~y~4) && main_~y~4 <= 90) && 90 <= main_~x~4)) || (63 <= main_~x~4 && (63 <= main_~y~4 && main_~y~4 <= 63) && main_~x~4 <= 63)) || (51 <= main_~x~4 && (main_~y~4 <= 51 && 51 <= main_~y~4) && main_~x~4 <= 51)) || (52 <= main_~x~4 && (main_~x~4 <= 52 && 52 <= main_~y~4) && main_~y~4 <= 52)) || (((74 <= main_~y~4 && main_~x~4 <= 74) && main_~y~4 <= 74) && 74 <= main_~x~4)) || (86 <= main_~x~4 && (86 <= main_~y~4 && main_~y~4 <= 86) && main_~x~4 <= 86)) || (56 <= main_~x~4 && (main_~y~4 <= 56 && main_~x~4 <= 56) && 56 <= main_~y~4)) || (67 <= main_~x~4 && (main_~y~4 <= 67 && 67 <= main_~y~4) && main_~x~4 <= 67)) || (83 <= main_~x~4 && (main_~y~4 <= 83 && 83 <= main_~y~4) && main_~x~4 <= 83)) || (((main_~x~4 <= 87 && 87 <= main_~y~4) && main_~y~4 <= 87) && 87 <= main_~x~4)) || (66 <= main_~x~4 && (66 <= main_~y~4 && main_~y~4 <= 66) && main_~x~4 <= 66)) || (((80 <= main_~y~4 && main_~x~4 <= 80) && main_~y~4 <= 80) && 80 <= main_~x~4)) || (70 <= main_~x~4 && (70 <= main_~y~4 && main_~x~4 <= 70) && main_~y~4 <= 70)) || (71 <= main_~x~4 && (71 <= main_~y~4 && main_~x~4 <= 71) && main_~y~4 <= 71)) || (((main_~x~4 <= 75 && main_~y~4 <= 75) && 75 <= main_~y~4) && 75 <= main_~x~4)) || ((main_~y~4 <= 100 && 99 < main_~y~4) && 100 <= main_~x~4)) || ((main_~x~4 <= 50 && main_~y~4 <= 50) && 50 <= main_~y~4)) || (((main_~x~4 <= 92 && 92 <= main_~y~4) && main_~y~4 <= 92) && 92 <= main_~x~4) - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((main_~y~4 <= 96 && 96 <= main_~y~4) && main_~x~4 <= 96) && 96 <= main_~x~4) || (79 <= main_~x~4 && (main_~y~4 <= 79 && 79 <= main_~y~4) && main_~x~4 <= 79)) || (((main_~y~4 <= 97 && main_~x~4 <= 97) && 97 <= main_~y~4) && 97 <= main_~x~4)) || (((95 <= main_~y~4 && main_~y~4 <= 95) && main_~x~4 <= 95) && 95 <= main_~x~4)) || (((91 <= main_~y~4 && main_~x~4 <= 91) && main_~y~4 <= 91) && 91 <= main_~x~4)) || (((main_~x~4 <= 72 && 72 <= main_~y~4) && main_~y~4 <= 72) && 72 <= main_~x~4)) || (((main_~x~4 <= 62 && 62 <= main_~y~4) && main_~y~4 <= 62) && 62 <= main_~x~4)) || (54 <= main_~x~4 && (54 <= main_~y~4 && main_~x~4 <= 54) && main_~y~4 <= 54)) || (60 <= main_~x~4 && (main_~y~4 <= 60 && main_~x~4 <= 60) && 60 <= main_~y~4)) || (98 <= main_~x~4 && (main_~x~4 <= 98 && main_~y~4 <= 98) && 98 <= main_~y~4)) || (((88 <= main_~y~4 && main_~y~4 <= 88) && main_~x~4 <= 88) && 88 <= main_~x~4)) || (((main_~x~4 <= 73 && 73 <= main_~y~4) && main_~y~4 <= 73) && 73 <= main_~x~4)) || (64 <= main_~x~4 && (main_~x~4 <= 64 && 64 <= main_~y~4) && main_~y~4 <= 64)) || (((main_~x~4 <= 76 && 76 <= main_~y~4) && main_~y~4 <= 76) && 76 <= main_~x~4)) || (((main_~y~4 <= 84 && main_~x~4 <= 84) && 84 <= main_~y~4) && 84 <= main_~x~4)) || (((main_~y~4 <= 85 && 85 <= main_~y~4) && main_~x~4 <= 85) && 85 <= main_~x~4)) || (((main_~x~4 <= 61 && 61 <= main_~y~4) && main_~y~4 <= 61) && 61 <= main_~x~4)) || (((main_~x~4 <= 59 && main_~y~4 <= 59) && 59 <= main_~y~4) && 59 <= main_~x~4)) || (69 <= main_~x~4 && (main_~y~4 <= 69 && main_~x~4 <= 69) && 69 <= main_~y~4)) || (((55 <= main_~y~4 && main_~y~4 <= 55) && main_~x~4 <= 55) && 55 <= main_~x~4)) || (((99 <= main_~y~4 && main_~y~4 <= 99) && main_~x~4 <= 99) && 99 <= main_~x~4)) || (53 <= main_~x~4 && (main_~x~4 <= 53 && main_~y~4 <= 53) && 53 <= main_~y~4)) || (77 <= main_~x~4 && (main_~x~4 <= 77 && main_~y~4 <= 77) && 77 <= main_~y~4)) || (89 <= main_~x~4 && (main_~y~4 <= 89 && main_~x~4 <= 89) && 89 <= main_~y~4)) || (94 <= main_~x~4 && (main_~y~4 <= 94 && main_~x~4 <= 94) && 94 <= main_~y~4)) || (((main_~y~4 <= 93 && 93 <= main_~y~4) && main_~x~4 <= 93) && 93 <= main_~x~4)) || (68 <= main_~x~4 && (main_~x~4 <= 68 && main_~y~4 <= 68) && 68 <= main_~y~4)) || (((main_~y~4 <= 81 && main_~x~4 <= 81) && 81 <= main_~y~4) && 81 <= main_~x~4)) || (((57 <= main_~y~4 && main_~y~4 <= 57) && main_~x~4 <= 57) && 57 <= main_~x~4)) || (((main_~x~4 <= 82 && 82 <= main_~y~4) && main_~y~4 <= 82) && 82 <= main_~x~4)) || (((main_~y~4 <= 58 && main_~x~4 <= 58) && 58 <= main_~y~4) && 58 <= main_~x~4)) || (78 <= main_~x~4 && (main_~x~4 <= 78 && 78 <= main_~y~4) && main_~y~4 <= 78)) || (((main_~y~4 <= 65 && main_~x~4 <= 65) && 65 <= main_~y~4) && 65 <= main_~x~4)) || (((main_~x~4 <= 90 && 90 <= main_~y~4) && main_~y~4 <= 90) && 90 <= main_~x~4)) || (63 <= main_~x~4 && (63 <= main_~y~4 && main_~y~4 <= 63) && main_~x~4 <= 63)) || (51 <= main_~x~4 && (main_~y~4 <= 51 && 51 <= main_~y~4) && main_~x~4 <= 51)) || (52 <= main_~x~4 && (main_~x~4 <= 52 && 52 <= main_~y~4) && main_~y~4 <= 52)) || (((74 <= main_~y~4 && main_~x~4 <= 74) && main_~y~4 <= 74) && 74 <= main_~x~4)) || (86 <= main_~x~4 && (86 <= main_~y~4 && main_~y~4 <= 86) && main_~x~4 <= 86)) || (56 <= main_~x~4 && (main_~y~4 <= 56 && main_~x~4 <= 56) && 56 <= main_~y~4)) || (67 <= main_~x~4 && (main_~y~4 <= 67 && 67 <= main_~y~4) && main_~x~4 <= 67)) || (83 <= main_~x~4 && (main_~y~4 <= 83 && 83 <= main_~y~4) && main_~x~4 <= 83)) || (((main_~x~4 <= 87 && 87 <= main_~y~4) && main_~y~4 <= 87) && 87 <= main_~x~4)) || (66 <= main_~x~4 && (66 <= main_~y~4 && main_~y~4 <= 66) && main_~x~4 <= 66)) || (((80 <= main_~y~4 && main_~x~4 <= 80) && main_~y~4 <= 80) && 80 <= main_~x~4)) || (70 <= main_~x~4 && (70 <= main_~y~4 && main_~x~4 <= 70) && main_~y~4 <= 70)) || (71 <= main_~x~4 && (71 <= main_~y~4 && main_~x~4 <= 71) && main_~y~4 <= 71)) || (((main_~x~4 <= 75 && main_~y~4 <= 75) && 75 <= main_~y~4) && 75 <= main_~x~4)) || ((main_~x~4 <= 50 && main_~y~4 <= 50) && 50 <= main_~y~4)) || (((main_~x~4 <= 92 && 92 <= main_~y~4) && main_~y~4 <= 92) && 92 <= main_~x~4) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 8 locations, 1 error locations. SAFE Result, 87.7s OverallTime, 57 OverallIterations, 102 TraceHistogramMax, 17.6s AutomataDifference, 0.0s DeadEndRemovalTime, 10.4s HoareAnnotationTime, HoareTripleCheckerStatistics: 464 SDtfs, 947 SDslu, 10266 SDs, 0 SdLazy, 8094 SolverSat, 1708 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8028 GetRequests, 6199 SyntacticMatches, 2 SemanticMatches, 1827 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6900 ImplicationChecksByTransitivity, 49.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=308occurred in iteration=56, 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: 0.5s AutomataMinimizationTime, 57 MinimizatonAttempts, 3995 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 306 NumberOfFragments, 2114 HoareAnnotationTreeSize, 4 FomulaSimplifications, 40190 FormulaSimplificationTreeSizeReduction, 1.9s HoareSimplificationTime, 4 FomulaSimplificationsInter, 596 FormulaSimplificationTreeSizeReductionInter, 8.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 52.1s InterpolantComputationTime, 13339 NumberOfCodeBlocks, 12541 NumberOfCodeBlocksAsserted, 964 NumberOfCheckSat, 13227 ConstructedInterpolants, 0 QuantifiedInterpolants, 5674359 SizeOfPredicates, 25 NumberOfNonLiveVariables, 11131 ConjunctsInSsa, 1456 ConjunctsInUnsatCore, 112 InterpolantComputations, 3 PerfectInterpolantSequences, 183380/343178 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/gj2007.c.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-22-35-403.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/gj2007.c.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-22-35-403.csv Received shutdown request...