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/toy/tooDifficultLoopInvariant/AnnoyingVillain.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-bd42740 [2018-09-23 21:32:21,982 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 21:32:21,984 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 21:32:21,997 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 21:32:21,997 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 21:32:21,998 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 21:32:21,999 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 21:32:22,001 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 21:32:22,003 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 21:32:22,004 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 21:32:22,005 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-23 21:32:22,005 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-23 21:32:22,006 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-23 21:32:22,007 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-23 21:32:22,008 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-23 21:32:22,009 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-23 21:32:22,014 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-23 21:32:22,019 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-23 21:32:22,021 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-23 21:32:22,025 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-23 21:32:22,026 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-23 21:32:22,030 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-23 21:32:22,037 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-23 21:32:22,044 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 21:32:22,059 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 21:32:22,059 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 21:32:22,060 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 21:32:22,060 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 21:32:22,061 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 21:32:22,061 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 21:32:22,061 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 21:32:22,062 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 21:32:22,062 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 21:32:22,062 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 21:32:22,062 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 21:32:22,062 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 21:32:22,063 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 21:32:22,063 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 21:32:22,063 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 21:32:22,063 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 21:32:22,063 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 21:32:22,063 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 21:32:22,064 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 21:32:22,064 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 21:32:22,064 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 21:32:22,064 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 21:32:22,064 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:32:22,065 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 21:32:22,065 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 21:32:22,065 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 21:32:22,065 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 21:32:22,065 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 21:32:22,066 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 21:32:22,066 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 21:32:22,126 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 21:32:22,140 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 21:32:22,144 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 21:32:22,147 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 21:32:22,148 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 21:32:22,148 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/AnnoyingVillain.bpl [2018-09-23 21:32:22,149 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/AnnoyingVillain.bpl' [2018-09-23 21:32:22,196 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 21:32:22,199 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 21:32:22,200 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 21:32:22,200 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 21:32:22,201 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 21:32:22,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:32:22" (1/1) ... [2018-09-23 21:32:22,236 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:32:22" (1/1) ... [2018-09-23 21:32:22,241 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-23 21:32:22,241 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-23 21:32:22,242 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-23 21:32:22,244 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 21:32:22,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 21:32:22,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 21:32:22,245 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 21:32:22,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:32:22" (1/1) ... [2018-09-23 21:32:22,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:32:22" (1/1) ... [2018-09-23 21:32:22,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:32:22" (1/1) ... [2018-09-23 21:32:22,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:32:22" (1/1) ... [2018-09-23 21:32:22,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:32:22" (1/1) ... [2018-09-23 21:32:22,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:32:22" (1/1) ... [2018-09-23 21:32:22,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:32:22" (1/1) ... [2018-09-23 21:32:22,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 21:32:22,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 21:32:22,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 21:32:22,272 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 21:32:22,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:32:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:32:22,354 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-23 21:32:22,354 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-23 21:32:22,354 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-23 21:32:22,523 INFO L351 CfgBuilder]: Using library mode [2018-09-23 21:32:22,524 INFO L202 PluginConnector]: Adding new model AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:32:22 BoogieIcfgContainer [2018-09-23 21:32:22,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 21:32:22,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 21:32:22,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 21:32:22,528 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 21:32:22,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:32:22" (1/2) ... [2018-09-23 21:32:22,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237c6078 and model type AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 09:32:22, skipping insertion in model container [2018-09-23 21:32:22,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:32:22" (2/2) ... [2018-09-23 21:32:22,532 INFO L112 eAbstractionObserver]: Analyzing ICFG AnnoyingVillain.bpl [2018-09-23 21:32:22,541 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 21:32:22,549 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 21:32:22,603 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 21:32:22,603 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 21:32:22,604 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 21:32:22,604 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 21:32:22,604 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 21:32:22,604 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 21:32:22,604 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 21:32:22,604 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 21:32:22,605 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 21:32:22,618 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-23 21:32:22,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-23 21:32:22,624 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:32:22,625 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-23 21:32:22,627 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:32:22,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:32:22,633 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-09-23 21:32:22,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:32:22,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:32:22,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:22,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:32:22,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:22,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:32:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:22,782 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:32:22,782 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-23 21:32:22,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 21:32:22,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 21:32:22,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:32:22,804 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-23 21:32:22,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:32:22,875 INFO L93 Difference]: Finished difference Result 11 states and 13 transitions. [2018-09-23 21:32:22,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 21:32:22,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-23 21:32:22,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:32:22,886 INFO L225 Difference]: With dead ends: 11 [2018-09-23 21:32:22,887 INFO L226 Difference]: Without dead ends: 5 [2018-09-23 21:32:22,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:32:22,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-23 21:32:22,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-23 21:32:22,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-23 21:32:22,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-23 21:32:22,928 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-23 21:32:22,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:32:22,928 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-23 21:32:22,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 21:32:22,929 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-23 21:32:22,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 21:32:22,929 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:32:22,929 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-23 21:32:22,930 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:32:22,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:32:22,930 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-09-23 21:32:22,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:32:22,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:32:22,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:22,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:32:22,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:32:23,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:23,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:32:23,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:32:23,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:32:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:32:23,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:32:23,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:23,274 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:32:23,274 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-23 21:32:23,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 21:32:23,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 21:32:23,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:32:23,276 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-23 21:32:23,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:32:23,386 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-23 21:32:23,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 21:32:23,387 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-23 21:32:23,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:32:23,387 INFO L225 Difference]: With dead ends: 8 [2018-09-23 21:32:23,388 INFO L226 Difference]: Without dead ends: 6 [2018-09-23 21:32:23,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:32:23,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-23 21:32:23,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-23 21:32:23,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-23 21:32:23,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-23 21:32:23,391 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-23 21:32:23,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:32:23,392 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-23 21:32:23,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 21:32:23,392 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-23 21:32:23,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 21:32:23,393 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:32:23,393 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-23 21:32:23,393 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:32:23,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:32:23,394 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2018-09-23 21:32:23,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:32:23,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:32:23,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:23,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:32:23,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:32:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:23,721 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:32:23,721 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:32:23,740 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:32:23,772 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:32:23,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:32:23,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:32:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:23,826 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:32:23,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 21:32:23,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 21:32:23,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 21:32:23,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:32:23,828 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-23 21:32:23,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:32:23,903 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-23 21:32:23,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 21:32:23,904 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-23 21:32:23,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:32:23,905 INFO L225 Difference]: With dead ends: 9 [2018-09-23 21:32:23,905 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 21:32:23,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:32:23,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 21:32:23,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 21:32:23,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 21:32:23,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-23 21:32:23,909 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-23 21:32:23,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:32:23,909 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-23 21:32:23,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 21:32:23,910 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-23 21:32:23,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 21:32:23,910 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:32:23,910 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-23 21:32:23,911 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:32:23,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:32:23,911 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times [2018-09-23 21:32:23,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:32:23,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:32:23,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:23,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:32:23,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:32:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:24,140 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:32:24,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:32:24,148 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:32:24,166 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 21:32:24,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:32:24,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:32:24,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:24,211 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:32:24,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 21:32:24,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 21:32:24,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 21:32:24,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:32:24,213 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-23 21:32:24,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:32:24,423 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-23 21:32:24,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 21:32:24,424 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-23 21:32:24,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:32:24,425 INFO L225 Difference]: With dead ends: 10 [2018-09-23 21:32:24,425 INFO L226 Difference]: Without dead ends: 8 [2018-09-23 21:32:24,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:32:24,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-23 21:32:24,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-23 21:32:24,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 21:32:24,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-23 21:32:24,429 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-23 21:32:24,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:32:24,429 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-23 21:32:24,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 21:32:24,430 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-23 21:32:24,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 21:32:24,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:32:24,430 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-23 21:32:24,430 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:32:24,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:32:24,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times [2018-09-23 21:32:24,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:32:24,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:32:24,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:24,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:32:24,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:32:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:24,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:32:24,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:32:24,548 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:32:24,558 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:32:24,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:32:24,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:32:24,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:24,612 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:32:24,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 21:32:24,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 21:32:24,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 21:32:24,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:32:24,614 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-23 21:32:24,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:32:24,728 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-23 21:32:24,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 21:32:24,729 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-23 21:32:24,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:32:24,729 INFO L225 Difference]: With dead ends: 11 [2018-09-23 21:32:24,729 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 21:32:24,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:32:24,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 21:32:24,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 21:32:24,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 21:32:24,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-23 21:32:24,733 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-23 21:32:24,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:32:24,734 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-23 21:32:24,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 21:32:24,734 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-23 21:32:24,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 21:32:24,735 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:32:24,735 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-23 21:32:24,735 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:32:24,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:32:24,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times [2018-09-23 21:32:24,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:32:24,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:32:24,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:24,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:32:24,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:32:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:24,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:32:24,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:32:24,961 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:32:24,972 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-23 21:32:24,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:32:24,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:32:25,004 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:25,032 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:32:25,032 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 21:32:25,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 21:32:25,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 21:32:25,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:32:25,033 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-23 21:32:25,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:32:25,118 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-23 21:32:25,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 21:32:25,118 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-23 21:32:25,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:32:25,119 INFO L225 Difference]: With dead ends: 12 [2018-09-23 21:32:25,120 INFO L226 Difference]: Without dead ends: 10 [2018-09-23 21:32:25,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:32:25,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-23 21:32:25,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-23 21:32:25,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 21:32:25,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-23 21:32:25,124 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-23 21:32:25,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:32:25,125 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-23 21:32:25,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 21:32:25,125 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-23 21:32:25,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 21:32:25,126 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:32:25,126 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-23 21:32:25,126 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:32:25,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:32:25,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times [2018-09-23 21:32:25,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:32:25,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:32:25,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:25,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:32:25,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:32:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:25,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:32:25,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:32:25,394 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:32:25,459 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-23 21:32:25,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:32:25,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:32:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:25,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:32:25,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 21:32:25,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 21:32:25,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 21:32:25,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:32:25,571 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-23 21:32:25,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:32:25,876 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-23 21:32:25,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:32:25,878 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-23 21:32:25,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:32:25,879 INFO L225 Difference]: With dead ends: 13 [2018-09-23 21:32:25,879 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 21:32:25,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:32:25,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 21:32:25,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 21:32:25,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 21:32:25,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-23 21:32:25,883 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-23 21:32:25,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:32:25,883 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-23 21:32:25,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 21:32:25,883 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-23 21:32:25,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 21:32:25,884 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:32:25,884 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-23 21:32:25,884 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:32:25,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:32:25,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times [2018-09-23 21:32:25,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:32:25,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:32:25,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:25,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:32:25,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:32:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:26,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:32:26,084 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:32:26,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:32:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:32:26,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:32:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:26,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:32:26,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 21:32:26,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:32:26,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:32:26,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:32:26,149 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-23 21:32:26,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:32:26,286 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-23 21:32:26,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 21:32:26,287 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-23 21:32:26,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:32:26,287 INFO L225 Difference]: With dead ends: 14 [2018-09-23 21:32:26,288 INFO L226 Difference]: Without dead ends: 12 [2018-09-23 21:32:26,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:32:26,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-23 21:32:26,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-23 21:32:26,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 21:32:26,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-23 21:32:26,292 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-23 21:32:26,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:32:26,292 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-23 21:32:26,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:32:26,292 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-23 21:32:26,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 21:32:26,293 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:32:26,293 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-23 21:32:26,293 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:32:26,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:32:26,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times [2018-09-23 21:32:26,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:32:26,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:32:26,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:26,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:32:26,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:32:26,491 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:26,491 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:32:26,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:32:26,508 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:32:26,520 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:32:26,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:32:26,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:32:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 21:32:26,961 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:32:26,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 18 [2018-09-23 21:32:26,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 21:32:26,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 21:32:26,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:32:26,962 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 19 states. [2018-09-23 21:32:27,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:32:27,851 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-09-23 21:32:27,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 21:32:27,853 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 11 [2018-09-23 21:32:27,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:32:27,855 INFO L225 Difference]: With dead ends: 35 [2018-09-23 21:32:27,855 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 21:32:27,856 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:32:27,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 21:32:27,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 19. [2018-09-23 21:32:27,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 21:32:27,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2018-09-23 21:32:27,862 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 11 [2018-09-23 21:32:27,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:32:27,863 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-09-23 21:32:27,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 21:32:27,863 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2018-09-23 21:32:27,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 21:32:27,863 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:32:27,863 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-23 21:32:27,864 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:32:27,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:32:27,864 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times [2018-09-23 21:32:27,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:32:27,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:32:27,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:27,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:32:27,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:32:28,255 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:28,256 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:32:28,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:32:28,266 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:32:28,283 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 21:32:28,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:32:28,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:32:28,307 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:28,334 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:32:28,334 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 21:32:28,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:32:28,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:32:28,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:32:28,335 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 12 states. [2018-09-23 21:32:28,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:32:28,507 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2018-09-23 21:32:28,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 21:32:28,508 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-23 21:32:28,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:32:28,511 INFO L225 Difference]: With dead ends: 23 [2018-09-23 21:32:28,511 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 21:32:28,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:32:28,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 21:32:28,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 21:32:28,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 21:32:28,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2018-09-23 21:32:28,518 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 12 [2018-09-23 21:32:28,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:32:28,518 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2018-09-23 21:32:28,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:32:28,519 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2018-09-23 21:32:28,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 21:32:28,519 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:32:28,519 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-23 21:32:28,520 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:32:28,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:32:28,520 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times [2018-09-23 21:32:28,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:32:28,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:32:28,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:28,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:32:28,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:32:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:28,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:32:28,794 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:32:28,806 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:32:28,820 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:32:28,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:32:28,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:32:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:28,872 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:32:28,872 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 21:32:28,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:32:28,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:32:28,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:32:28,873 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand 13 states. [2018-09-23 21:32:29,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:32:29,076 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2018-09-23 21:32:29,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 21:32:29,086 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-23 21:32:29,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:32:29,087 INFO L225 Difference]: With dead ends: 24 [2018-09-23 21:32:29,087 INFO L226 Difference]: Without dead ends: 22 [2018-09-23 21:32:29,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:32:29,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-23 21:32:29,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-23 21:32:29,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 21:32:29,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2018-09-23 21:32:29,098 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 13 [2018-09-23 21:32:29,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:32:29,099 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2018-09-23 21:32:29,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:32:29,099 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2018-09-23 21:32:29,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 21:32:29,099 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:32:29,100 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-23 21:32:29,100 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:32:29,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:32:29,100 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times [2018-09-23 21:32:29,101 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:32:29,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:32:29,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:29,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:32:29,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:32:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:29,480 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:32:29,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:32:29,487 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:32:29,510 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 21:32:29,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:32:29,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:32:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:29,591 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:32:29,591 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 21:32:29,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:32:29,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:32:29,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:32:29,592 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 14 states. [2018-09-23 21:32:29,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:32:29,850 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-09-23 21:32:29,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 21:32:29,851 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-23 21:32:29,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:32:29,852 INFO L225 Difference]: With dead ends: 25 [2018-09-23 21:32:29,852 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 21:32:29,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:32:29,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 21:32:29,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 21:32:29,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 21:32:29,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2018-09-23 21:32:29,858 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 14 [2018-09-23 21:32:29,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:32:29,858 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-09-23 21:32:29,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:32:29,858 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2018-09-23 21:32:29,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 21:32:29,859 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:32:29,859 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-23 21:32:29,859 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:32:29,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:32:29,860 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times [2018-09-23 21:32:29,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:32:29,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:32:29,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:29,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:32:29,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:32:30,422 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:30,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:32:30,422 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:32:30,430 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:32:30,450 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 21:32:30,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:32:30,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:32:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:30,509 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:32:30,509 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 21:32:30,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:32:30,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:32:30,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:32:30,510 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 15 states. [2018-09-23 21:32:30,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:32:30,766 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2018-09-23 21:32:30,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 21:32:30,767 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-23 21:32:30,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:32:30,768 INFO L225 Difference]: With dead ends: 26 [2018-09-23 21:32:30,768 INFO L226 Difference]: Without dead ends: 24 [2018-09-23 21:32:30,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:32:30,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-23 21:32:30,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-23 21:32:30,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 21:32:30,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2018-09-23 21:32:30,774 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 15 [2018-09-23 21:32:30,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:32:30,774 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2018-09-23 21:32:30,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:32:30,774 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2018-09-23 21:32:30,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 21:32:30,775 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:32:30,775 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-23 21:32:30,775 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:32:30,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:32:30,776 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times [2018-09-23 21:32:30,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:32:30,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:32:30,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:30,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:32:30,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:32:31,183 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:31,184 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:32:31,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:32:31,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:32:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:32:31,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:32:31,237 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:31,271 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:32:31,271 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 21:32:31,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:32:31,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:32:31,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:32:31,273 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 16 states. [2018-09-23 21:32:31,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:32:31,760 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2018-09-23 21:32:31,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 21:32:31,764 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-23 21:32:31,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:32:31,765 INFO L225 Difference]: With dead ends: 27 [2018-09-23 21:32:31,765 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 21:32:31,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:32:31,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 21:32:31,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 21:32:31,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 21:32:31,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2018-09-23 21:32:31,771 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 16 [2018-09-23 21:32:31,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:32:31,771 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2018-09-23 21:32:31,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:32:31,772 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2018-09-23 21:32:31,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 21:32:31,772 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:32:31,772 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-23 21:32:31,772 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:32:31,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:32:31,773 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times [2018-09-23 21:32:31,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:32:31,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:32:31,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:31,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:32:31,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:32:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:32,211 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:32:32,211 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) [2018-09-23 21:32:32,226 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:32:32,241 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:32:32,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:32:32,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:32:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:32,281 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:32:32,281 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 21:32:32,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 21:32:32,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 21:32:32,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:32:32,282 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 17 states. [2018-09-23 21:32:32,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:32:32,628 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2018-09-23 21:32:32,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 21:32:32,629 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-23 21:32:32,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:32:32,630 INFO L225 Difference]: With dead ends: 28 [2018-09-23 21:32:32,630 INFO L226 Difference]: Without dead ends: 26 [2018-09-23 21:32:32,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:32:32,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-23 21:32:32,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-23 21:32:32,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 21:32:32,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2018-09-23 21:32:32,635 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2018-09-23 21:32:32,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:32:32,636 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2018-09-23 21:32:32,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 21:32:32,636 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2018-09-23 21:32:32,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:32:32,637 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:32:32,637 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-23 21:32:32,637 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:32:32,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:32:32,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times [2018-09-23 21:32:32,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:32:32,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:32:32,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:32,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:32:32,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:32,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:32:33,352 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:33,352 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:32:33,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:32:33,360 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:32:33,378 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 21:32:33,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:32:33,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:32:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:33,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:32:33,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 21:32:33,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:32:33,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:32:33,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:32:33,443 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 18 states. [2018-09-23 21:32:33,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:32:33,749 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2018-09-23 21:32:33,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 21:32:33,749 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-23 21:32:33,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:32:33,750 INFO L225 Difference]: With dead ends: 29 [2018-09-23 21:32:33,750 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 21:32:33,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:32:33,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 21:32:33,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 21:32:33,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 21:32:33,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2018-09-23 21:32:33,760 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 18 [2018-09-23 21:32:33,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:32:33,760 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2018-09-23 21:32:33,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:32:33,760 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2018-09-23 21:32:33,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 21:32:33,761 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:32:33,761 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-23 21:32:33,761 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:32:33,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:32:33,762 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 16 times [2018-09-23 21:32:33,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:32:33,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:32:33,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:33,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:32:33,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:32:36,648 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:36,649 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:32:36,649 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:32:36,656 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:32:36,670 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:32:36,670 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:32:36,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:32:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:36,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:32:36,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 21:32:36,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:32:36,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:32:36,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=342, Unknown=1, NotChecked=0, Total=380 [2018-09-23 21:32:36,726 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 20 states. [2018-09-23 21:32:37,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:32:37,322 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2018-09-23 21:32:37,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 21:32:37,322 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-23 21:32:37,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:32:37,323 INFO L225 Difference]: With dead ends: 31 [2018-09-23 21:32:37,323 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 21:32:37,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=37, Invalid=342, Unknown=1, NotChecked=0, Total=380 [2018-09-23 21:32:37,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 21:32:37,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 21:32:37,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 21:32:37,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2018-09-23 21:32:37,329 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 20 [2018-09-23 21:32:37,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:32:37,329 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2018-09-23 21:32:37,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:32:37,330 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2018-09-23 21:32:37,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 21:32:37,330 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:32:37,330 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-23 21:32:37,331 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:32:37,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:32:37,331 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 17 times [2018-09-23 21:32:37,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:32:37,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:32:37,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:37,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:32:37,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:32:39,206 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:39,207 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:32:39,207 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:32:39,215 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:32:39,280 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-23 21:32:39,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:32:39,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:32:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:39,313 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:32:39,313 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 21:32:39,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 21:32:39,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 21:32:39,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:32:39,314 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 21 states. [2018-09-23 21:32:41,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:32:41,865 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2018-09-23 21:32:41,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 21:32:41,866 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-23 21:32:41,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:32:41,866 INFO L225 Difference]: With dead ends: 32 [2018-09-23 21:32:41,867 INFO L226 Difference]: Without dead ends: 30 [2018-09-23 21:32:41,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:32:41,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-23 21:32:41,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-23 21:32:41,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 21:32:41,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2018-09-23 21:32:41,873 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 21 [2018-09-23 21:32:41,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:32:41,873 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2018-09-23 21:32:41,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 21:32:41,873 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2018-09-23 21:32:41,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 21:32:41,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:32:41,874 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-23 21:32:41,874 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:32:41,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:32:41,875 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 18 times [2018-09-23 21:32:41,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:32:41,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:32:41,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:41,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:32:41,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:32:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:42,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:32:42,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:32:42,363 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:32:42,389 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-09-23 21:32:42,390 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:32:42,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:32:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:42,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:32:42,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 21:32:42,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 21:32:42,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 21:32:42,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:32:42,432 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 22 states. [2018-09-23 21:32:45,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:32:45,048 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2018-09-23 21:32:45,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 21:32:45,049 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-23 21:32:45,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:32:45,050 INFO L225 Difference]: With dead ends: 33 [2018-09-23 21:32:45,050 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 21:32:45,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:32:45,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 21:32:45,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 21:32:45,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 21:32:45,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2018-09-23 21:32:45,056 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 22 [2018-09-23 21:32:45,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:32:45,056 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2018-09-23 21:32:45,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 21:32:45,057 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2018-09-23 21:32:45,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 21:32:45,057 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:32:45,057 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-23 21:32:45,058 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:32:45,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:32:45,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 19 times [2018-09-23 21:32:45,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:32:45,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:32:45,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:45,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:32:45,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:32:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 209 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:49,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:32:49,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:32:50,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:32:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:32:50,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:32:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 209 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:50,074 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:32:50,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 21:32:50,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 21:32:50,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 21:32:50,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=461, Unknown=2, NotChecked=0, Total=506 [2018-09-23 21:32:50,075 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 23 states. [2018-09-23 21:32:52,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:32:52,672 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2018-09-23 21:32:52,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:32:52,673 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-23 21:32:52,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:32:52,674 INFO L225 Difference]: With dead ends: 34 [2018-09-23 21:32:52,674 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 21:32:52,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=43, Invalid=461, Unknown=2, NotChecked=0, Total=506 [2018-09-23 21:32:52,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 21:32:52,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-23 21:32:52,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 21:32:52,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2018-09-23 21:32:52,679 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 23 [2018-09-23 21:32:52,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:32:52,679 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2018-09-23 21:32:52,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 21:32:52,680 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2018-09-23 21:32:52,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 21:32:52,680 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:32:52,680 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-23 21:32:52,681 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:32:52,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:32:52,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 20 times [2018-09-23 21:32:52,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:32:52,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:32:52,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:52,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:32:52,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:32:52,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:32:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 230 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:55,651 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:32:55,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:32:55,660 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:32:55,683 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:32:55,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:32:55,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:32:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 230 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:32:55,781 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:32:55,781 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 21:32:55,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 21:32:55,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 21:32:55,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=506, Unknown=1, NotChecked=0, Total=552 [2018-09-23 21:32:55,782 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 24 states. [2018-09-23 21:33:00,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:00,491 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-09-23 21:33:00,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 21:33:00,491 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-23 21:33:00,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:00,492 INFO L225 Difference]: With dead ends: 35 [2018-09-23 21:33:00,493 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 21:33:00,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=45, Invalid=506, Unknown=1, NotChecked=0, Total=552 [2018-09-23 21:33:00,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 21:33:00,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 21:33:00,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 21:33:00,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2018-09-23 21:33:00,498 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 24 [2018-09-23 21:33:00,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:00,499 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2018-09-23 21:33:00,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 21:33:00,499 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2018-09-23 21:33:00,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 21:33:00,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:00,500 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-23 21:33:00,500 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:00,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:00,500 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 21 times [2018-09-23 21:33:00,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:00,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:00,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:00,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:00,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:05,666 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 252 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:05,666 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:05,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:33:05,677 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:33:05,696 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-23 21:33:05,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:05,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 252 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:05,767 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:05,767 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 21:33:05,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 21:33:05,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 21:33:05,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=551, Unknown=2, NotChecked=0, Total=600 [2018-09-23 21:33:05,768 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 25 states. [2018-09-23 21:33:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:08,952 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2018-09-23 21:33:08,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 21:33:08,954 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-23 21:33:08,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:08,954 INFO L225 Difference]: With dead ends: 36 [2018-09-23 21:33:08,954 INFO L226 Difference]: Without dead ends: 34 [2018-09-23 21:33:08,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=47, Invalid=551, Unknown=2, NotChecked=0, Total=600 [2018-09-23 21:33:08,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-23 21:33:08,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-23 21:33:08,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 21:33:08,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2018-09-23 21:33:08,960 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 25 [2018-09-23 21:33:08,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:08,960 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2018-09-23 21:33:08,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 21:33:08,960 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2018-09-23 21:33:08,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 21:33:08,961 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:08,961 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-23 21:33:08,961 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:08,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:08,961 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 22 times [2018-09-23 21:33:08,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:08,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:08,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:08,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:08,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:10,898 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:10,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:33:10,905 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:33:10,935 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:33:10,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:10,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:11,026 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:11,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 21:33:11,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 21:33:11,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 21:33:11,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:33:11,027 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 26 states. [2018-09-23 21:33:14,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:14,035 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2018-09-23 21:33:14,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 21:33:14,036 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-23 21:33:14,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:14,037 INFO L225 Difference]: With dead ends: 37 [2018-09-23 21:33:14,037 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 21:33:14,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:33:14,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 21:33:14,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 21:33:14,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 21:33:14,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2018-09-23 21:33:14,043 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 26 [2018-09-23 21:33:14,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:14,043 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2018-09-23 21:33:14,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 21:33:14,043 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2018-09-23 21:33:14,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 21:33:14,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:14,044 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-23 21:33:14,044 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:14,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:14,044 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 23 times [2018-09-23 21:33:14,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:14,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:14,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:14,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:14,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:16,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:16,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:33:16,107 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:33:16,126 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-09-23 21:33:16,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:16,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:16,160 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:16,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:16,187 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 21:33:16,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 21:33:16,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 21:33:16,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:33:16,188 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 28 states. [2018-09-23 21:33:17,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:17,147 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2018-09-23 21:33:17,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 21:33:17,148 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-23 21:33:17,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:17,149 INFO L225 Difference]: With dead ends: 39 [2018-09-23 21:33:17,149 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 21:33:17,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:33:17,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 21:33:17,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 21:33:17,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 21:33:17,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2018-09-23 21:33:17,156 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 28 [2018-09-23 21:33:17,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:17,157 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2018-09-23 21:33:17,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 21:33:17,157 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2018-09-23 21:33:17,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 21:33:17,158 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:17,158 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-23 21:33:17,158 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:17,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:17,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 24 times [2018-09-23 21:33:17,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:17,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:17,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:17,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:17,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 349 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:23,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:23,683 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:33:23,691 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:33:23,715 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-23 21:33:23,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:23,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 349 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:23,765 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:23,765 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 21:33:23,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 21:33:23,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 21:33:23,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=755, Unknown=2, NotChecked=0, Total=812 [2018-09-23 21:33:23,766 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 29 states. [2018-09-23 21:33:34,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:34,769 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2018-09-23 21:33:34,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 21:33:34,770 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-23 21:33:34,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:34,771 INFO L225 Difference]: With dead ends: 40 [2018-09-23 21:33:34,771 INFO L226 Difference]: Without dead ends: 38 [2018-09-23 21:33:34,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=55, Invalid=755, Unknown=2, NotChecked=0, Total=812 [2018-09-23 21:33:34,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-23 21:33:34,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-23 21:33:34,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-23 21:33:34,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2018-09-23 21:33:34,776 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 29 [2018-09-23 21:33:34,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:34,776 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2018-09-23 21:33:34,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 21:33:34,776 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2018-09-23 21:33:34,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 21:33:34,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:34,777 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-23 21:33:34,777 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:34,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:34,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 25 times [2018-09-23 21:33:34,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:34,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:34,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:34,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:34,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:39,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:39,249 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:33:39,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:39,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:39,312 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:39,336 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:39,336 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 21:33:39,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 21:33:39,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 21:33:39,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=812, Unknown=1, NotChecked=0, Total=870 [2018-09-23 21:33:39,337 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 30 states. [2018-09-23 21:33:44,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:44,368 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2018-09-23 21:33:44,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 21:33:44,368 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-23 21:33:44,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:44,369 INFO L225 Difference]: With dead ends: 41 [2018-09-23 21:33:44,369 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 21:33:44,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=57, Invalid=812, Unknown=1, NotChecked=0, Total=870 [2018-09-23 21:33:44,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 21:33:44,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 21:33:44,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 21:33:44,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2018-09-23 21:33:44,375 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 30 [2018-09-23 21:33:44,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:44,375 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2018-09-23 21:33:44,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 21:33:44,375 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2018-09-23 21:33:44,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-23 21:33:44,376 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:44,376 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-23 21:33:44,376 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:44,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:44,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 26 times [2018-09-23 21:33:44,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:44,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:44,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:44,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:44,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 403 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:56,314 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:56,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:33:56,328 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:33:56,349 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:33:56,349 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:56,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:56,379 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 403 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:56,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:56,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 21:33:56,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 21:33:56,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 21:33:56,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=866, Unknown=5, NotChecked=0, Total=930 [2018-09-23 21:33:56,400 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 31 states. [2018-09-23 21:34:02,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:02,200 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2018-09-23 21:34:02,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 21:34:02,202 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-23 21:34:02,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:02,203 INFO L225 Difference]: With dead ends: 42 [2018-09-23 21:34:02,203 INFO L226 Difference]: Without dead ends: 40 [2018-09-23 21:34:02,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=59, Invalid=866, Unknown=5, NotChecked=0, Total=930 [2018-09-23 21:34:02,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-23 21:34:02,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-23 21:34:02,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 21:34:02,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2018-09-23 21:34:02,209 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 31 [2018-09-23 21:34:02,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:02,209 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2018-09-23 21:34:02,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 21:34:02,209 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2018-09-23 21:34:02,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 21:34:02,210 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:02,210 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-23 21:34:02,210 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:02,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:02,210 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 27 times [2018-09-23 21:34:02,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:02,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:02,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:02,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:02,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 433 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:08,907 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:08,908 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:08,923 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:34:08,946 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-23 21:34:08,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:08,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:08,975 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 433 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:09,009 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:09,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 21:34:09,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 21:34:09,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 21:34:09,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=929, Unknown=2, NotChecked=0, Total=992 [2018-09-23 21:34:09,010 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 32 states. [2018-09-23 21:34:10,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:10,175 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2018-09-23 21:34:10,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:34:10,175 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-23 21:34:10,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:10,176 INFO L225 Difference]: With dead ends: 43 [2018-09-23 21:34:10,177 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 21:34:10,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=61, Invalid=929, Unknown=2, NotChecked=0, Total=992 [2018-09-23 21:34:10,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 21:34:10,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 21:34:10,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 21:34:10,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2018-09-23 21:34:10,183 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 32 [2018-09-23 21:34:10,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:10,183 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2018-09-23 21:34:10,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 21:34:10,184 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2018-09-23 21:34:10,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 21:34:10,184 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:10,184 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-23 21:34:10,185 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:10,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:10,185 INFO L82 PathProgramCache]: Analyzing trace with hash -410989408, now seen corresponding path program 28 times [2018-09-23 21:34:10,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:10,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:10,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:10,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:10,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:18,389 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 463 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:18,389 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:18,389 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:18,397 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:34:18,416 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:34:18,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:18,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:18,443 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 463 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:18,475 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:18,475 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 21:34:18,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 21:34:18,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 21:34:18,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=991, Unknown=2, NotChecked=0, Total=1056 [2018-09-23 21:34:18,477 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 33 states. [2018-09-23 21:34:23,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:23,929 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2018-09-23 21:34:23,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 21:34:23,931 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-23 21:34:23,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:23,932 INFO L225 Difference]: With dead ends: 44 [2018-09-23 21:34:23,932 INFO L226 Difference]: Without dead ends: 42 [2018-09-23 21:34:23,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=63, Invalid=991, Unknown=2, NotChecked=0, Total=1056 [2018-09-23 21:34:23,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-23 21:34:23,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-23 21:34:23,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-23 21:34:23,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2018-09-23 21:34:23,938 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 33 [2018-09-23 21:34:23,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:23,938 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2018-09-23 21:34:23,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 21:34:23,938 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2018-09-23 21:34:23,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 21:34:23,939 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:23,939 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-23 21:34:23,939 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:23,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:23,939 INFO L82 PathProgramCache]: Analyzing trace with hash 144226374, now seen corresponding path program 29 times [2018-09-23 21:34:23,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:23,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:23,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:23,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:23,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 495 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:33,580 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:33,580 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:33,587 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:34:33,627 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-09-23 21:34:33,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:33,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:33,647 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 495 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:33,670 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:33,670 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 21:34:33,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 21:34:33,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 21:34:33,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1054, Unknown=3, NotChecked=0, Total=1122 [2018-09-23 21:34:33,672 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 34 states. [2018-09-23 21:34:45,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:45,253 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2018-09-23 21:34:45,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 21:34:45,254 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-23 21:34:45,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:45,255 INFO L225 Difference]: With dead ends: 45 [2018-09-23 21:34:45,255 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 21:34:45,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=65, Invalid=1054, Unknown=3, NotChecked=0, Total=1122 [2018-09-23 21:34:45,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 21:34:45,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 21:34:45,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 21:34:45,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2018-09-23 21:34:45,260 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 34 [2018-09-23 21:34:45,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:45,261 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2018-09-23 21:34:45,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 21:34:45,261 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2018-09-23 21:34:45,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 21:34:45,261 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:45,261 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-23 21:34:45,263 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:45,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:45,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468230, now seen corresponding path program 30 times [2018-09-23 21:34:45,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:45,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:45,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:45,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:45,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 560 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:50,191 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:50,192 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 [2018-09-23 21:34:50,200 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:34:50,228 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-09-23 21:34:50,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:50,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:50,248 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 560 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:50,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:50,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 21:34:50,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 21:34:50,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 21:34:50,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1190, Unknown=1, NotChecked=0, Total=1260 [2018-09-23 21:34:50,269 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 36 states. [2018-09-23 21:34:55,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:55,886 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2018-09-23 21:34:55,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 21:34:55,887 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-23 21:34:55,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:55,888 INFO L225 Difference]: With dead ends: 47 [2018-09-23 21:34:55,888 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 21:34:55,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=69, Invalid=1190, Unknown=1, NotChecked=0, Total=1260 [2018-09-23 21:34:55,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 21:34:55,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 21:34:55,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 21:34:55,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2018-09-23 21:34:55,893 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 36 [2018-09-23 21:34:55,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:55,893 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2018-09-23 21:34:55,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 21:34:55,893 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2018-09-23 21:34:55,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-23 21:34:55,894 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:55,894 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-23 21:34:55,894 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:55,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:55,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772896, now seen corresponding path program 31 times [2018-09-23 21:34:55,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:55,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:55,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:55,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:55,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:10,429 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 591 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:10,429 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:10,429 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 [2018-09-23 21:35:10,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:10,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:10,495 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 591 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:10,520 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:10,520 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 21:35:10,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 21:35:10,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 21:35:10,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1256, Unknown=5, NotChecked=0, Total=1332 [2018-09-23 21:35:10,522 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 37 states. [2018-09-23 21:35:16,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:16,571 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2018-09-23 21:35:16,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 21:35:16,572 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-23 21:35:16,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:16,572 INFO L225 Difference]: With dead ends: 48 [2018-09-23 21:35:16,572 INFO L226 Difference]: Without dead ends: 46 [2018-09-23 21:35:16,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=71, Invalid=1256, Unknown=5, NotChecked=0, Total=1332 [2018-09-23 21:35:16,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-23 21:35:16,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-23 21:35:16,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-23 21:35:16,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2018-09-23 21:35:16,578 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 37 [2018-09-23 21:35:16,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:16,578 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2018-09-23 21:35:16,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 21:35:16,578 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2018-09-23 21:35:16,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 21:35:16,579 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:16,579 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-23 21:35:16,579 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:16,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:16,580 INFO L82 PathProgramCache]: Analyzing trace with hash 440348358, now seen corresponding path program 32 times [2018-09-23 21:35:16,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:16,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:16,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:16,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:16,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 626 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:30,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:30,545 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 [2018-09-23 21:35:30,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:35:30,579 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:35:30,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:30,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 626 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:30,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:30,618 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 21:35:30,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 21:35:30,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 21:35:30,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1328, Unknown=5, NotChecked=0, Total=1406 [2018-09-23 21:35:30,620 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 38 states. [2018-09-23 21:35:38,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:38,574 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2018-09-23 21:35:38,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 21:35:38,575 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-23 21:35:38,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:38,575 INFO L225 Difference]: With dead ends: 49 [2018-09-23 21:35:38,575 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 21:35:38,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=73, Invalid=1328, Unknown=5, NotChecked=0, Total=1406 [2018-09-23 21:35:38,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 21:35:38,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 21:35:38,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 21:35:38,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2018-09-23 21:35:38,581 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 38 [2018-09-23 21:35:38,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:38,581 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2018-09-23 21:35:38,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 21:35:38,581 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2018-09-23 21:35:38,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-23 21:35:38,582 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:38,582 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-23 21:35:38,582 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:38,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:38,582 INFO L82 PathProgramCache]: Analyzing trace with hash 765893344, now seen corresponding path program 33 times [2018-09-23 21:35:38,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:38,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:38,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:38,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:38,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 662 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:55,964 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:55,964 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 [2018-09-23 21:35:55,972 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:35:56,005 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-09-23 21:35:56,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:56,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 662 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:56,042 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:56,042 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 21:35:56,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 21:35:56,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 21:35:56,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1401, Unknown=6, NotChecked=0, Total=1482 [2018-09-23 21:35:56,043 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 39 states. [2018-09-23 21:36:10,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:10,112 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2018-09-23 21:36:10,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 21:36:10,112 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-23 21:36:10,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:10,113 INFO L225 Difference]: With dead ends: 50 [2018-09-23 21:36:10,113 INFO L226 Difference]: Without dead ends: 48 [2018-09-23 21:36:10,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=75, Invalid=1401, Unknown=6, NotChecked=0, Total=1482 [2018-09-23 21:36:10,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-23 21:36:10,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-23 21:36:10,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-23 21:36:10,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2018-09-23 21:36:10,119 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 39 [2018-09-23 21:36:10,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:10,119 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2018-09-23 21:36:10,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 21:36:10,119 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2018-09-23 21:36:10,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 21:36:10,120 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:10,120 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-23 21:36:10,120 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:10,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:10,121 INFO L82 PathProgramCache]: Analyzing trace with hash -2027113978, now seen corresponding path program 34 times [2018-09-23 21:36:10,121 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:10,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:10,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:10,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:10,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:10,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 702 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:17,451 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:17,451 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 [2018-09-23 21:36:17,467 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:36:17,516 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:36:17,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:17,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 702 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:17,632 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:17,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 21:36:17,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 21:36:17,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 21:36:17,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1482, Unknown=1, NotChecked=0, Total=1560 [2018-09-23 21:36:17,634 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 40 states. [2018-09-23 21:36:34,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:34,459 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2018-09-23 21:36:34,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 21:36:34,459 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-23 21:36:34,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:34,460 INFO L225 Difference]: With dead ends: 51 [2018-09-23 21:36:34,460 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 21:36:34,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=77, Invalid=1482, Unknown=1, NotChecked=0, Total=1560 [2018-09-23 21:36:34,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 21:36:34,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 21:36:34,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 21:36:34,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2018-09-23 21:36:34,465 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 40 [2018-09-23 21:36:34,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:34,466 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2018-09-23 21:36:34,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 21:36:34,466 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2018-09-23 21:36:34,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-23 21:36:34,466 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:34,466 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-23 21:36:34,466 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:34,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:34,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972256, now seen corresponding path program 35 times [2018-09-23 21:36:34,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:34,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:34,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:34,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:34,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:34,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 737 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:48,749 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:48,749 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:36:48,757 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:36:48,804 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-09-23 21:36:48,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:48,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:48,818 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 737 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:48,839 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:48,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 21:36:48,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 21:36:48,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 21:36:48,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1557, Unknown=4, NotChecked=0, Total=1640 [2018-09-23 21:36:48,841 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 41 states. Received shutdown request... [2018-09-23 21:37:00,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:37:00,726 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 21:37:00,733 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 21:37:00,733 INFO L202 PluginConnector]: Adding new model AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 09:37:00 BoogieIcfgContainer [2018-09-23 21:37:00,733 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 21:37:00,734 INFO L168 Benchmark]: Toolchain (without parser) took 278537.33 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 152.6 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 417.5 MB). Peak memory consumption was 570.1 MB. Max. memory is 7.1 GB. [2018-09-23 21:37:00,736 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:37:00,736 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.33 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. [2018-09-23 21:37:00,737 INFO L168 Benchmark]: Boogie Preprocessor took 26.54 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. [2018-09-23 21:37:00,737 INFO L168 Benchmark]: RCFGBuilder took 252.22 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 21:37:00,738 INFO L168 Benchmark]: TraceAbstraction took 278208.30 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 152.6 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 396.4 MB). Peak memory consumption was 548.9 MB. Max. memory is 7.1 GB. [2018-09-23 21:37:00,741 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.33 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 26.54 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 252.22 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 278208.30 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 152.6 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 396.4 MB). Peak memory consumption was 548.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 24]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 24). Cancelled while BasicCegarLoop was constructing difference of abstraction (49states) and FLOYD_HOARE automaton (currently 32 states, 41 states before enhancement), while ReachableStatesComputation was computing reachable states (30 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 278.1s OverallTime, 36 OverallIterations, 38 TraceHistogramMax, 126.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 114 SDtfs, 57 SDslu, 682 SDs, 0 SdLazy, 19681 SolverSat, 42 SolverUnsat, 48 SolverUnknown, 0 SolverNotchecked, 122.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1495 GetRequests, 732 SyntacticMatches, 34 SemanticMatches, 729 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 147.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=35, 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: 0.1s AutomataMinimizationTime, 35 MinimizatonAttempts, 13 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 148.2s InterpolantComputationTime, 1551 NumberOfCodeBlocks, 1551 NumberOfCodeBlocksAsserted, 257 NumberOfCheckSat, 1480 ConstructedInterpolants, 0 QuantifiedInterpolants, 418554 SizeOfPredicates, 34 NumberOfNonLiveVariables, 2991 ConjunctsInSsa, 1408 ConjunctsInUnsatCore, 71 InterpolantComputations, 1 PerfectInterpolantSequences, 1/17832 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/AnnoyingVillain.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_21-37-00-754.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/AnnoyingVillain.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_21-37-00-754.csv Completed graceful shutdown