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 0.1.23-1cc990c [2018-09-30 23:46:41,297 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:46:41,299 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:46:41,311 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:46:41,311 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:46:41,312 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:46:41,314 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:46:41,315 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:46:41,317 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:46:41,318 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:46:41,320 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 23:46:41,343 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 23:46:41,372 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:46:41,372 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:46:41,373 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:46:41,375 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:46:41,375 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:46:41,375 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:46:41,376 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:46:41,376 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:46:41,376 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:46:41,376 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:46:41,377 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:46:41,378 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:46:41,378 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:46:41,378 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:46:41,378 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:46:41,378 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:46:41,380 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:46:41,380 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:46:41,380 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:46:41,380 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:46:41,380 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:46:41,381 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:46:41,381 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:46:41,381 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:46:41,381 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:46:41,382 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:46:41,382 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:46:41,382 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:46:41,382 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:46:41,382 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:46:41,448 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:46:41,460 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:46:41,464 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:46:41,465 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:46:41,466 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:46:41,467 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/AnnoyingVillain.bpl [2018-09-30 23:46:41,467 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/AnnoyingVillain.bpl' [2018-09-30 23:46:41,517 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:46:41,521 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:46:41,521 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:46:41,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:46:41,523 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:46:41,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:46:41" (1/1) ... [2018-09-30 23:46:41,555 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:46:41" (1/1) ... [2018-09-30 23:46:41,559 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 23:46:41,560 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 23:46:41,560 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 23:46:41,562 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:46:41,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:46:41,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:46:41,563 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:46:41,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:46:41" (1/1) ... [2018-09-30 23:46:41,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:46:41" (1/1) ... [2018-09-30 23:46:41,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:46:41" (1/1) ... [2018-09-30 23:46:41,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:46:41" (1/1) ... [2018-09-30 23:46:41,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:46:41" (1/1) ... [2018-09-30 23:46:41,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:46:41" (1/1) ... [2018-09-30 23:46:41,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:46:41" (1/1) ... [2018-09-30 23:46:41,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:46:41,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:46:41,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:46:41,586 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:46:41,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:46:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:46:41,654 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 23:46:41,654 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 23:46:41,654 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 23:46:41,846 INFO L345 CfgBuilder]: Using library mode [2018-09-30 23:46:41,847 INFO L202 PluginConnector]: Adding new model AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:46:41 BoogieIcfgContainer [2018-09-30 23:46:41,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:46:41,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:46:41,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:46:41,851 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:46:41,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:46:41" (1/2) ... [2018-09-30 23:46:41,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76f74738 and model type AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:46:41, skipping insertion in model container [2018-09-30 23:46:41,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:46:41" (2/2) ... [2018-09-30 23:46:41,855 INFO L112 eAbstractionObserver]: Analyzing ICFG AnnoyingVillain.bpl [2018-09-30 23:46:41,865 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:46:41,873 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:46:41,926 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:46:41,927 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:46:41,927 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:46:41,927 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:46:41,928 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:46:41,928 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:46:41,928 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:46:41,928 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:46:41,928 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:46:41,947 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 23:46:41,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 23:46:41,964 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:41,968 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 23:46:41,969 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:41,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:41,977 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-09-30 23:46:41,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:41,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:42,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:42,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:46:42,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:42,144 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:46:42,145 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 23:46:42,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:46:42,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:46:42,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:46:42,162 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 23:46:42,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:42,233 INFO L93 Difference]: Finished difference Result 11 states and 13 transitions. [2018-09-30 23:46:42,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:46:42,236 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 23:46:42,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:42,246 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:46:42,247 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 23:46:42,251 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 [2018-09-30 23:46:42,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 23:46:42,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 23:46:42,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 23:46:42,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 23:46:42,285 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 23:46:42,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:42,286 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 23:46:42,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:46:42,286 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 23:46:42,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 23:46:42,286 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:42,287 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 23:46:42,287 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:42,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:42,287 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-09-30 23:46:42,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:42,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:42,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:42,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:46:42,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:42,495 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:42,495 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:46:42,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:46:42,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:42,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:42,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:42,646 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:42,647 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 23:46:42,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:46:42,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:46:42,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:46:42,651 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-30 23:46:42,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:42,771 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-30 23:46:42,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:46:42,775 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-30 23:46:42,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:42,776 INFO L225 Difference]: With dead ends: 8 [2018-09-30 23:46:42,776 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 23:46:42,777 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 [2018-09-30 23:46:42,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 23:46:42,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 23:46:42,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 23:46:42,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 23:46:42,782 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-30 23:46:42,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:42,782 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 23:46:42,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:46:42,783 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 23:46:42,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 23:46:42,783 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:42,783 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-30 23:46:42,784 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:42,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:42,785 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2018-09-30 23:46:42,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:42,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:42,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:42,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:46:42,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:43,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:43,033 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:46:43,052 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:46:43,089 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:46:43,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:43,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:43,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:43,153 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:43,153 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 23:46:43,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:46:43,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:46:43,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:46:43,154 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-30 23:46:43,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:43,204 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 23:46:43,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:46:43,205 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-30 23:46:43,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:43,206 INFO L225 Difference]: With dead ends: 9 [2018-09-30 23:46:43,206 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 23:46:43,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:46:43,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 23:46:43,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 23:46:43,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 23:46:43,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 23:46:43,210 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-30 23:46:43,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:43,210 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 23:46:43,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:46:43,211 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 23:46:43,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 23:46:43,211 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:43,212 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-30 23:46:43,212 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:43,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:43,213 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times [2018-09-30 23:46:43,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:43,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:43,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:43,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:43,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:43,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:43,434 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:43,434 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 [2018-09-30 23:46:43,451 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:46:43,489 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 23:46:43,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:43,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:43,532 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:43,533 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 23:46:43,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:46:43,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:46:43,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:46:43,534 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-30 23:46:43,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:43,741 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 23:46:43,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:46:43,743 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-30 23:46:43,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:43,743 INFO L225 Difference]: With dead ends: 10 [2018-09-30 23:46:43,744 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 23:46:43,744 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 [2018-09-30 23:46:43,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 23:46:43,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 23:46:43,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 23:46:43,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 23:46:43,747 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-30 23:46:43,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:43,748 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 23:46:43,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:46:43,748 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 23:46:43,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 23:46:43,749 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:43,749 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-30 23:46:43,749 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:43,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:43,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times [2018-09-30 23:46:43,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:43,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:43,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:43,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:43,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:43,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:43,880 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:43,880 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:46:43,889 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:46:43,896 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:46:43,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:43,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:43,927 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:43,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:43,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:46:43,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:46:43,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:46:43,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:46:43,956 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-30 23:46:44,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:44,062 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 23:46:44,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:46:44,063 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-30 23:46:44,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:44,064 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:46:44,065 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 23:46:44,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:46:44,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 23:46:44,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 23:46:44,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 23:46:44,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 23:46:44,069 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-30 23:46:44,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:44,069 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 23:46:44,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:46:44,069 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 23:46:44,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:46:44,070 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:44,070 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-30 23:46:44,070 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:44,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:44,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times [2018-09-30 23:46:44,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:44,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:44,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:44,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:44,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:44,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:44,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:44,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:46:44,277 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:46:44,289 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 23:46:44,289 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:44,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:44,347 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:44,347 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:46:44,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:46:44,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:46:44,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:46:44,348 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-30 23:46:44,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:44,450 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 23:46:44,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:46:44,451 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-30 23:46:44,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:44,452 INFO L225 Difference]: With dead ends: 12 [2018-09-30 23:46:44,452 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 23:46:44,453 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 [2018-09-30 23:46:44,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 23:46:44,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 23:46:44,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 23:46:44,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 23:46:44,457 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-30 23:46:44,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:44,457 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 23:46:44,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:46:44,458 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 23:46:44,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 23:46:44,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:44,458 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-30 23:46:44,459 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:44,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:44,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times [2018-09-30 23:46:44,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:44,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:44,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:44,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:44,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:44,686 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:44,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:46:44,694 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:46:44,764 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 23:46:44,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:44,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:44,867 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:44,867 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:46:44,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:46:44,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:46:44,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:46:44,868 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-30 23:46:45,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:45,105 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 23:46:45,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:46:45,106 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-30 23:46:45,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:45,106 INFO L225 Difference]: With dead ends: 13 [2018-09-30 23:46:45,106 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 23:46:45,107 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 [2018-09-30 23:46:45,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 23:46:45,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 23:46:45,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 23:46:45,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 23:46:45,111 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-30 23:46:45,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:45,111 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 23:46:45,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:46:45,111 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 23:46:45,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:46:45,112 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:45,112 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-30 23:46:45,112 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:45,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:45,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times [2018-09-30 23:46:45,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:45,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:45,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:45,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:45,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:45,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:45,287 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:45,287 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 [2018-09-30 23:46:45,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:46:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:45,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:45,343 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:45,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:45,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:46:45,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:46:45,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:46:45,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:46:45,372 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-30 23:46:45,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:45,489 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 23:46:45,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:46:45,490 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-30 23:46:45,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:45,490 INFO L225 Difference]: With dead ends: 14 [2018-09-30 23:46:45,490 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 23:46:45,491 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 [2018-09-30 23:46:45,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 23:46:45,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 23:46:45,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 23:46:45,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 23:46:45,494 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-30 23:46:45,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:45,494 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 23:46:45,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:46:45,494 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 23:46:45,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:46:45,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:45,495 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-30 23:46:45,495 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:45,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:45,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times [2018-09-30 23:46:45,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:45,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:45,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:45,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:46:45,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:45,781 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:45,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:45,782 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 [2018-09-30 23:46:45,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:46:45,809 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:46:45,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:45,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:46:46,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:46,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 18 [2018-09-30 23:46:46,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:46:46,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:46:46,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:46:46,225 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 19 states. [2018-09-30 23:46:47,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:47,071 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-09-30 23:46:47,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:46:47,072 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 11 [2018-09-30 23:46:47,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:47,073 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:46:47,073 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 23:46:47,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:46:47,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 23:46:47,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 19. [2018-09-30 23:46:47,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 23:46:47,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2018-09-30 23:46:47,081 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 11 [2018-09-30 23:46:47,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:47,081 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-09-30 23:46:47,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:46:47,081 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2018-09-30 23:46:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 23:46:47,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:47,082 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-30 23:46:47,082 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:47,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:47,083 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times [2018-09-30 23:46:47,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:47,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:47,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:47,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:47,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:47,460 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:47,460 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:46:47,467 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:46:47,480 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 23:46:47,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:47,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:47,508 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:47,532 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:47,533 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 23:46:47,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:46:47,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:46:47,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:46:47,534 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 12 states. [2018-09-30 23:46:47,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:47,703 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2018-09-30 23:46:47,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:46:47,703 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-30 23:46:47,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:47,705 INFO L225 Difference]: With dead ends: 23 [2018-09-30 23:46:47,705 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 23:46:47,706 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 [2018-09-30 23:46:47,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 23:46:47,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 23:46:47,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 23:46:47,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2018-09-30 23:46:47,711 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 12 [2018-09-30 23:46:47,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:47,712 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2018-09-30 23:46:47,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:46:47,712 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2018-09-30 23:46:47,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:46:47,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:47,713 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-30 23:46:47,713 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:47,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:47,713 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times [2018-09-30 23:46:47,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:47,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:47,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:47,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:47,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:47,988 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:47,989 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:46:47,997 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:46:48,015 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:46:48,016 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:48,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:48,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:48,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 23:46:48,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:46:48,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:46:48,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:46:48,050 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand 13 states. [2018-09-30 23:46:48,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:48,244 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2018-09-30 23:46:48,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:46:48,254 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-30 23:46:48,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:48,254 INFO L225 Difference]: With dead ends: 24 [2018-09-30 23:46:48,255 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 23:46:48,255 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 [2018-09-30 23:46:48,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 23:46:48,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 23:46:48,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:46:48,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2018-09-30 23:46:48,263 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 13 [2018-09-30 23:46:48,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:48,263 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2018-09-30 23:46:48,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:46:48,263 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2018-09-30 23:46:48,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:46:48,264 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:48,264 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-30 23:46:48,264 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:48,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:48,266 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times [2018-09-30 23:46:48,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:48,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:48,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:48,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:48,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:48,606 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:48,606 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:48,606 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:46:48,617 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:46:48,631 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 23:46:48,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:48,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:48,695 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:48,695 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 23:46:48,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:46:48,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:46:48,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:46:48,696 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 14 states. [2018-09-30 23:46:48,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:48,966 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-09-30 23:46:48,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:46:48,966 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 23:46:48,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:48,967 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:46:48,968 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 23:46:48,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:46:48,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 23:46:48,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 23:46:48,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 23:46:48,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2018-09-30 23:46:48,974 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 14 [2018-09-30 23:46:48,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:48,974 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-09-30 23:46:48,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:46:48,974 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2018-09-30 23:46:48,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:46:48,975 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:48,975 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-30 23:46:48,975 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:48,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:48,976 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times [2018-09-30 23:46:48,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:48,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:48,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:48,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:48,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:49,443 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:49,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:49,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:46:49,450 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:46:49,475 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:46:49,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:49,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:49,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:49,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 23:46:49,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:46:49,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:46:49,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:46:49,530 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 15 states. [2018-09-30 23:46:49,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:49,758 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2018-09-30 23:46:49,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:46:49,760 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-30 23:46:49,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:49,761 INFO L225 Difference]: With dead ends: 26 [2018-09-30 23:46:49,761 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 23:46:49,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:46:49,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 23:46:49,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 23:46:49,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:46:49,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2018-09-30 23:46:49,767 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 15 [2018-09-30 23:46:49,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:49,767 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2018-09-30 23:46:49,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:46:49,767 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2018-09-30 23:46:49,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 23:46:49,768 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:49,768 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-30 23:46:49,768 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:49,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:49,769 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times [2018-09-30 23:46:49,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:49,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:49,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:49,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:49,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:50,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:50,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:46:50,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:46:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:50,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:50,164 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:50,164 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 23:46:50,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:46:50,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:46:50,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:46:50,165 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 16 states. [2018-09-30 23:46:50,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:50,749 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2018-09-30 23:46:50,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:46:50,753 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-30 23:46:50,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:50,754 INFO L225 Difference]: With dead ends: 27 [2018-09-30 23:46:50,754 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 23:46:50,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:46:50,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 23:46:50,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 23:46:50,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 23:46:50,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2018-09-30 23:46:50,759 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 16 [2018-09-30 23:46:50,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:50,760 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2018-09-30 23:46:50,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:46:50,760 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2018-09-30 23:46:50,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:46:50,760 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:50,760 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-30 23:46:50,761 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:50,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:50,761 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times [2018-09-30 23:46:50,761 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:50,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:50,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:50,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:46:50,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:51,101 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:51,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:46:51,112 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:46:51,122 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:46:51,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:51,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:51,143 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:51,164 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:51,164 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 23:46:51,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:46:51,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:46:51,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:46:51,165 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 17 states. [2018-09-30 23:46:51,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:51,532 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2018-09-30 23:46:51,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:46:51,533 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-30 23:46:51,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:51,534 INFO L225 Difference]: With dead ends: 28 [2018-09-30 23:46:51,534 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 23:46:51,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:46:51,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 23:46:51,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 23:46:51,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:46:51,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2018-09-30 23:46:51,538 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2018-09-30 23:46:51,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:51,539 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2018-09-30 23:46:51,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:46:51,539 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2018-09-30 23:46:51,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:46:51,539 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:51,540 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-30 23:46:51,540 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:51,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:51,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times [2018-09-30 23:46:51,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:51,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:51,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:51,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:51,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:52,226 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:52,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:52,227 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:46:52,235 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:46:52,249 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 23:46:52,250 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:52,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:52,285 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:52,285 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 23:46:52,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:46:52,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:46:52,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:46:52,286 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 18 states. [2018-09-30 23:46:52,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:52,583 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2018-09-30 23:46:52,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:46:52,583 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-30 23:46:52,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:52,584 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:46:52,584 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:46:52,584 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 [2018-09-30 23:46:52,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:46:52,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 23:46:52,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 23:46:52,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2018-09-30 23:46:52,589 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 18 [2018-09-30 23:46:52,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:52,589 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2018-09-30 23:46:52,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:46:52,589 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2018-09-30 23:46:52,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 23:46:52,590 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:52,590 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-30 23:46:52,590 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:52,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:52,591 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 16 times [2018-09-30 23:46:52,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:52,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:52,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:52,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:52,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:55,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:55,121 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:46:55,135 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:46:55,171 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:46:55,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:55,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:55,281 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:55,282 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 23:46:55,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:46:55,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:46:55,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=342, Unknown=1, NotChecked=0, Total=380 [2018-09-30 23:46:55,283 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 20 states. [2018-09-30 23:46:59,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:59,994 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2018-09-30 23:46:59,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:46:59,995 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-30 23:46:59,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:59,996 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:46:59,996 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:46:59,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=37, Invalid=342, Unknown=1, NotChecked=0, Total=380 [2018-09-30 23:46:59,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:47:00,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 23:47:00,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 23:47:00,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2018-09-30 23:47:00,003 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 20 [2018-09-30 23:47:00,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:00,003 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2018-09-30 23:47:00,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:47:00,003 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2018-09-30 23:47:00,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:47:00,004 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:00,004 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-30 23:47:00,004 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:00,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:00,005 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 17 times [2018-09-30 23:47:00,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:00,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:00,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:00,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:00,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 169 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:06,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:06,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:47:06,977 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:47:07,050 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 23:47:07,050 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:07,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 169 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:07,093 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:07,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 23:47:07,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:47:07,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:47:07,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=378, Unknown=3, NotChecked=0, Total=420 [2018-09-30 23:47:07,094 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 21 states. [2018-09-30 23:47:07,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:07,655 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2018-09-30 23:47:07,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:47:07,656 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-30 23:47:07,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:07,657 INFO L225 Difference]: With dead ends: 32 [2018-09-30 23:47:07,657 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 23:47:07,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=39, Invalid=378, Unknown=3, NotChecked=0, Total=420 [2018-09-30 23:47:07,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 23:47:07,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 23:47:07,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:47:07,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2018-09-30 23:47:07,665 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 21 [2018-09-30 23:47:07,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:07,665 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2018-09-30 23:47:07,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:47:07,665 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2018-09-30 23:47:07,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:47:07,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:07,666 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-30 23:47:07,666 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:07,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:07,667 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 18 times [2018-09-30 23:47:07,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:07,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:07,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:07,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:07,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:12,273 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 188 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:12,274 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:12,274 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:47:12,289 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:47:12,389 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-09-30 23:47:12,390 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:12,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 188 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:12,426 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:12,426 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 23:47:12,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:47:12,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:47:12,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=419, Unknown=2, NotChecked=0, Total=462 [2018-09-30 23:47:12,428 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 22 states. [2018-09-30 23:47:15,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:15,000 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2018-09-30 23:47:15,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 23:47:15,001 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-30 23:47:15,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:15,002 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:47:15,002 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:47:15,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=41, Invalid=419, Unknown=2, NotChecked=0, Total=462 [2018-09-30 23:47:15,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:47:15,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 23:47:15,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 23:47:15,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2018-09-30 23:47:15,010 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 22 [2018-09-30 23:47:15,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:15,010 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2018-09-30 23:47:15,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:47:15,010 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2018-09-30 23:47:15,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 23:47:15,011 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:15,011 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-30 23:47:15,011 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:15,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:15,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 19 times [2018-09-30 23:47:15,012 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:15,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:15,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:15,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:15,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:15,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:20,682 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 208 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:20,682 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:20,682 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:47:20,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:47:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:20,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:20,767 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 208 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:20,795 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:20,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 23:47:20,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:47:20,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:47:20,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=461, Unknown=2, NotChecked=0, Total=506 [2018-09-30 23:47:20,797 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 23 states. [2018-09-30 23:47:21,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:21,729 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2018-09-30 23:47:21,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:47:21,730 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-30 23:47:21,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:21,731 INFO L225 Difference]: With dead ends: 34 [2018-09-30 23:47:21,731 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 23:47:21,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=43, Invalid=461, Unknown=2, NotChecked=0, Total=506 [2018-09-30 23:47:21,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 23:47:21,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 23:47:21,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:47:21,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2018-09-30 23:47:21,738 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 23 [2018-09-30 23:47:21,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:21,738 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2018-09-30 23:47:21,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:47:21,738 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2018-09-30 23:47:21,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 23:47:21,739 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:21,739 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-30 23:47:21,739 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:21,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:21,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 20 times [2018-09-30 23:47:21,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:21,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:21,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:21,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:47:21,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 229 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:28,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:28,058 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:47:28,067 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:47:28,092 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:47:28,093 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:28,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 229 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:28,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:28,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 23:47:28,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:47:28,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:47:28,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=505, Unknown=2, NotChecked=0, Total=552 [2018-09-30 23:47:28,177 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 24 states. [2018-09-30 23:47:28,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:28,866 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-09-30 23:47:28,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:47:28,866 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-30 23:47:28,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:28,867 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:47:28,867 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:47:28,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=45, Invalid=505, Unknown=2, NotChecked=0, Total=552 [2018-09-30 23:47:28,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:47:28,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 23:47:28,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 23:47:28,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2018-09-30 23:47:28,873 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 24 [2018-09-30 23:47:28,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:28,873 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2018-09-30 23:47:28,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:47:28,874 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2018-09-30 23:47:28,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 23:47:28,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:28,874 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-30 23:47:28,874 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:28,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:28,875 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 21 times [2018-09-30 23:47:28,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:28,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:28,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:28,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:28,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 250 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:38,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:38,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:47:38,083 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:47:38,101 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 23:47:38,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:38,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:38,142 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 250 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:38,170 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:38,171 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 23:47:38,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 23:47:38,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 23:47:38,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=549, Unknown=4, NotChecked=0, Total=600 [2018-09-30 23:47:38,172 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 25 states. [2018-09-30 23:47:39,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:39,608 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2018-09-30 23:47:39,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:47:39,610 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-30 23:47:39,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:39,611 INFO L225 Difference]: With dead ends: 36 [2018-09-30 23:47:39,611 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 23:47:39,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=47, Invalid=549, Unknown=4, NotChecked=0, Total=600 [2018-09-30 23:47:39,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 23:47:39,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 23:47:39,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:47:39,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2018-09-30 23:47:39,616 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 25 [2018-09-30 23:47:39,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:39,616 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2018-09-30 23:47:39,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 23:47:39,617 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2018-09-30 23:47:39,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 23:47:39,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:39,617 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-30 23:47:39,618 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:39,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:39,618 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 22 times [2018-09-30 23:47:39,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:39,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:39,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:39,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:39,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:49,330 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 274 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:49,331 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:49,331 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:47:49,340 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:47:49,374 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:47:49,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:49,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 274 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:49,447 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:49,447 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 23:47:49,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:47:49,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:47:49,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=597, Unknown=4, NotChecked=0, Total=650 [2018-09-30 23:47:49,448 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 26 states. [2018-09-30 23:47:58,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:58,612 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2018-09-30 23:47:58,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:47:58,613 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-30 23:47:58,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:58,613 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:47:58,613 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:47:58,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=49, Invalid=597, Unknown=4, NotChecked=0, Total=650 [2018-09-30 23:47:58,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:47:58,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 23:47:58,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 23:47:58,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2018-09-30 23:47:58,619 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 26 [2018-09-30 23:47:58,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:58,620 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2018-09-30 23:47:58,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:47:58,620 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2018-09-30 23:47:58,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 23:47:58,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:58,620 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-30 23:47:58,621 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:58,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:58,621 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 23 times [2018-09-30 23:47:58,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:58,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:58,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:58,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:58,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:03,933 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 324 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:03,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:03,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:03,941 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:48:03,961 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-09-30 23:48:03,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:03,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 324 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:04,014 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:04,015 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 23:48:04,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:48:04,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:48:04,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=701, Unknown=2, NotChecked=0, Total=756 [2018-09-30 23:48:04,016 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 28 states. [2018-09-30 23:48:17,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:17,185 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2018-09-30 23:48:17,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 23:48:17,186 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-30 23:48:17,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:17,187 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:48:17,187 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:48:17,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=53, Invalid=701, Unknown=2, NotChecked=0, Total=756 [2018-09-30 23:48:17,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:48:17,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 23:48:17,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 23:48:17,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2018-09-30 23:48:17,195 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 28 [2018-09-30 23:48:17,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:17,196 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2018-09-30 23:48:17,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:48:17,196 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2018-09-30 23:48:17,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 23:48:17,197 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:17,197 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-30 23:48:17,197 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:17,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:17,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 24 times [2018-09-30 23:48:17,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:17,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:17,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:17,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:17,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 348 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:25,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:25,349 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:25,356 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:48:25,380 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-30 23:48:25,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:25,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 348 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:25,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:25,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 23:48:25,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 23:48:25,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 23:48:25,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=754, Unknown=3, NotChecked=0, Total=812 [2018-09-30 23:48:25,441 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 29 states. [2018-09-30 23:48:30,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:30,649 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2018-09-30 23:48:30,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:48:30,650 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-30 23:48:30,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:30,650 INFO L225 Difference]: With dead ends: 40 [2018-09-30 23:48:30,650 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 23:48:30,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=55, Invalid=754, Unknown=3, NotChecked=0, Total=812 [2018-09-30 23:48:30,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 23:48:30,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 23:48:30,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 23:48:30,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2018-09-30 23:48:30,655 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 29 [2018-09-30 23:48:30,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:30,655 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2018-09-30 23:48:30,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 23:48:30,655 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2018-09-30 23:48:30,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 23:48:30,656 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:30,656 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-30 23:48:30,656 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:30,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:30,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 25 times [2018-09-30 23:48:30,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:30,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:30,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:30,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:30,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:36,932 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 377 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:36,932 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:36,932 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:36,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:36,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 377 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:37,014 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:37,015 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 23:48:37,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 23:48:37,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 23:48:37,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=811, Unknown=2, NotChecked=0, Total=870 [2018-09-30 23:48:37,016 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 30 states. [2018-09-30 23:48:40,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:40,291 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2018-09-30 23:48:40,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 23:48:40,292 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-30 23:48:40,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:40,293 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:48:40,293 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:48:40,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=57, Invalid=811, Unknown=2, NotChecked=0, Total=870 [2018-09-30 23:48:40,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:48:40,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 23:48:40,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 23:48:40,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2018-09-30 23:48:40,297 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 30 [2018-09-30 23:48:40,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:40,297 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2018-09-30 23:48:40,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 23:48:40,297 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2018-09-30 23:48:40,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 23:48:40,298 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:40,298 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-30 23:48:40,298 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:40,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:40,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 26 times [2018-09-30 23:48:40,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:40,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:40,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:40,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:40,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:46,869 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 405 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:46,869 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:46,869 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:46,883 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:48:46,902 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:48:46,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:46,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:46,921 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 405 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:46,942 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:46,942 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 23:48:46,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 23:48:46,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 23:48:46,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=869, Unknown=2, NotChecked=0, Total=930 [2018-09-30 23:48:46,943 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 31 states. [2018-09-30 23:48:50,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:50,178 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2018-09-30 23:48:50,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:48:50,180 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-30 23:48:50,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:50,180 INFO L225 Difference]: With dead ends: 42 [2018-09-30 23:48:50,180 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 23:48:50,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=59, Invalid=869, Unknown=2, NotChecked=0, Total=930 [2018-09-30 23:48:50,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 23:48:50,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 23:48:50,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 23:48:50,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2018-09-30 23:48:50,185 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 31 [2018-09-30 23:48:50,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:50,185 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2018-09-30 23:48:50,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 23:48:50,185 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2018-09-30 23:48:50,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 23:48:50,185 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:50,186 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-30 23:48:50,186 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:50,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:50,186 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 27 times [2018-09-30 23:48:50,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:50,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:50,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:50,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:50,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:59,238 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 432 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:59,239 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:59,239 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:59,252 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:48:59,278 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 23:48:59,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:59,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 432 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:59,340 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:59,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 23:48:59,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 23:48:59,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 23:48:59,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=928, Unknown=3, NotChecked=0, Total=992 [2018-09-30 23:48:59,343 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 32 states. [2018-09-30 23:49:06,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:06,658 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2018-09-30 23:49:06,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:49:06,659 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-30 23:49:06,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:06,660 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:49:06,660 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:49:06,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=61, Invalid=928, Unknown=3, NotChecked=0, Total=992 [2018-09-30 23:49:06,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:49:06,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 23:49:06,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 23:49:06,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2018-09-30 23:49:06,666 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 32 [2018-09-30 23:49:06,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:06,666 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2018-09-30 23:49:06,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 23:49:06,666 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2018-09-30 23:49:06,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 23:49:06,667 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:06,667 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-30 23:49:06,667 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:06,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:06,668 INFO L82 PathProgramCache]: Analyzing trace with hash -410989408, now seen corresponding path program 28 times [2018-09-30 23:49:06,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:06,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:06,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:06,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:06,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:06,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 461 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:19,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:19,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:19,594 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:49:19,613 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:49:19,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:19,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:19,641 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 461 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:19,676 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:19,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 23:49:19,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 23:49:19,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 23:49:19,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=989, Unknown=4, NotChecked=0, Total=1056 [2018-09-30 23:49:19,677 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 33 states. [2018-09-30 23:49:25,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:25,540 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2018-09-30 23:49:25,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 23:49:25,542 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-30 23:49:25,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:25,543 INFO L225 Difference]: With dead ends: 44 [2018-09-30 23:49:25,543 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 23:49:25,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=63, Invalid=989, Unknown=4, NotChecked=0, Total=1056 [2018-09-30 23:49:25,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 23:49:25,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 23:49:25,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 23:49:25,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2018-09-30 23:49:25,554 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 33 [2018-09-30 23:49:25,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:25,554 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2018-09-30 23:49:25,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 23:49:25,554 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2018-09-30 23:49:25,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 23:49:25,555 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:25,555 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-30 23:49:25,555 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:25,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:25,555 INFO L82 PathProgramCache]: Analyzing trace with hash 144226374, now seen corresponding path program 29 times [2018-09-30 23:49:25,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:25,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:25,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:25,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:25,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:36,109 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 495 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:36,109 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:36,109 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:36,116 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:49:36,143 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-09-30 23:49:36,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:36,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 495 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:36,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:36,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 23:49:36,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 23:49:36,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 23:49:36,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1053, Unknown=4, NotChecked=0, Total=1122 [2018-09-30 23:49:36,181 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 34 states. [2018-09-30 23:49:43,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:43,816 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2018-09-30 23:49:43,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:49:43,816 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-30 23:49:43,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:43,817 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:49:43,817 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:49:43,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=65, Invalid=1053, Unknown=4, NotChecked=0, Total=1122 [2018-09-30 23:49:43,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:49:43,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 23:49:43,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 23:49:43,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2018-09-30 23:49:43,822 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 34 [2018-09-30 23:49:43,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:43,822 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2018-09-30 23:49:43,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 23:49:43,823 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2018-09-30 23:49:43,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 23:49:43,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:43,823 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-30 23:49:43,823 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:43,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:43,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468230, now seen corresponding path program 30 times [2018-09-30 23:49:43,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:43,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:43,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:43,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:43,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 558 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:55,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:55,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:55,855 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:49:55,882 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-09-30 23:49:55,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:55,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 558 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:55,919 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:55,919 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 23:49:55,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 23:49:55,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 23:49:55,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1187, Unknown=4, NotChecked=0, Total=1260 [2018-09-30 23:49:55,920 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 36 states. [2018-09-30 23:50:06,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:06,306 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2018-09-30 23:50:06,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 23:50:06,306 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-30 23:50:06,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:06,307 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:50:06,307 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:50:06,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=69, Invalid=1187, Unknown=4, NotChecked=0, Total=1260 [2018-09-30 23:50:06,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:50:06,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 23:50:06,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 23:50:06,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2018-09-30 23:50:06,312 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 36 [2018-09-30 23:50:06,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:06,312 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2018-09-30 23:50:06,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 23:50:06,312 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2018-09-30 23:50:06,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 23:50:06,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:06,313 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-30 23:50:06,313 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:06,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:06,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772896, now seen corresponding path program 31 times [2018-09-30 23:50:06,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:06,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:06,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:06,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:06,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 589 refuted. 6 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:22,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:22,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:22,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:50:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:22,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 589 refuted. 6 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:22,800 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:22,800 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 23:50:22,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 23:50:22,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 23:50:22,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1255, Unknown=6, NotChecked=0, Total=1332 [2018-09-30 23:50:22,801 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 37 states. [2018-09-30 23:50:30,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:30,459 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2018-09-30 23:50:30,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 23:50:30,460 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-30 23:50:30,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:30,461 INFO L225 Difference]: With dead ends: 48 [2018-09-30 23:50:30,461 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 23:50:30,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=71, Invalid=1255, Unknown=6, NotChecked=0, Total=1332 [2018-09-30 23:50:30,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 23:50:30,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 23:50:30,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 23:50:30,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2018-09-30 23:50:30,466 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 37 [2018-09-30 23:50:30,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:30,466 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2018-09-30 23:50:30,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 23:50:30,466 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2018-09-30 23:50:30,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 23:50:30,467 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:30,467 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-30 23:50:30,467 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:30,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:30,467 INFO L82 PathProgramCache]: Analyzing trace with hash 440348358, now seen corresponding path program 32 times [2018-09-30 23:50:30,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:30,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:30,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:30,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:50:30,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 626 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:42,438 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:42,439 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:42,446 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:50:42,472 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:50:42,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:42,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 626 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:42,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:42,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 23:50:42,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:50:42,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:50:42,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1329, Unknown=4, NotChecked=0, Total=1406 [2018-09-30 23:50:42,514 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 38 states. [2018-09-30 23:50:58,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:58,948 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2018-09-30 23:50:58,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 23:50:58,948 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-30 23:50:58,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:58,949 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:50:58,949 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:50:58,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=73, Invalid=1329, Unknown=4, NotChecked=0, Total=1406 [2018-09-30 23:50:58,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:50:58,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 23:50:58,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 23:50:58,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2018-09-30 23:50:58,954 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 38 [2018-09-30 23:50:58,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:58,954 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2018-09-30 23:50:58,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:50:58,955 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2018-09-30 23:50:58,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 23:50:58,955 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:58,955 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-30 23:50:58,955 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:58,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:58,955 INFO L82 PathProgramCache]: Analyzing trace with hash 765893344, now seen corresponding path program 33 times [2018-09-30 23:50:58,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:58,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:58,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:58,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:58,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:58,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 663 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:13,943 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:13,943 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:13,951 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:51:13,983 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-09-30 23:51:13,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:13,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 663 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:14,019 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:14,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 23:51:14,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 23:51:14,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 23:51:14,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1402, Unknown=5, NotChecked=0, Total=1482 [2018-09-30 23:51:14,021 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 39 states. [2018-09-30 23:51:26,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:26,544 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2018-09-30 23:51:26,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:51:26,545 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-30 23:51:26,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:26,545 INFO L225 Difference]: With dead ends: 50 [2018-09-30 23:51:26,546 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 23:51:26,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=75, Invalid=1402, Unknown=5, NotChecked=0, Total=1482 [2018-09-30 23:51:26,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 23:51:26,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 23:51:26,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 23:51:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2018-09-30 23:51:26,551 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 39 [2018-09-30 23:51:26,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:26,551 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2018-09-30 23:51:26,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 23:51:26,552 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2018-09-30 23:51:26,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 23:51:26,552 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:26,552 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-30 23:51:26,552 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:26,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:26,553 INFO L82 PathProgramCache]: Analyzing trace with hash -2027113978, now seen corresponding path program 34 times [2018-09-30 23:51:26,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:26,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:26,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:26,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:26,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 698 refuted. 5 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:44,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:44,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:44,587 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:51:44,612 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:51:44,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:44,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:44,625 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 698 refuted. 5 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:44,646 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:44,647 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 23:51:44,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 23:51:44,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 23:51:44,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1476, Unknown=7, NotChecked=0, Total=1560 [2018-09-30 23:51:44,648 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 40 states. [2018-09-30 23:52:05,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:05,201 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2018-09-30 23:52:05,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 23:52:05,201 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-30 23:52:05,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:05,202 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:52:05,202 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:52:05,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=77, Invalid=1476, Unknown=7, NotChecked=0, Total=1560 [2018-09-30 23:52:05,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:52:05,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 23:52:05,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 23:52:05,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2018-09-30 23:52:05,207 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 40 [2018-09-30 23:52:05,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:05,208 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2018-09-30 23:52:05,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 23:52:05,208 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2018-09-30 23:52:05,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 23:52:05,208 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:05,208 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-30 23:52:05,208 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:05,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:05,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972256, now seen corresponding path program 35 times [2018-09-30 23:52:05,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:05,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:05,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:05,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:05,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 739 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:23,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:23,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:23,465 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:52:23,512 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-09-30 23:52:23,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:23,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:23,527 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 739 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:23,547 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:23,547 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 23:52:23,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 23:52:23,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 23:52:23,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1554, Unknown=7, NotChecked=0, Total=1640 [2018-09-30 23:52:23,548 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 41 states. [2018-09-30 23:52:42,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:42,571 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2018-09-30 23:52:42,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 23:52:42,572 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-30 23:52:42,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:42,573 INFO L225 Difference]: With dead ends: 52 [2018-09-30 23:52:42,573 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 23:52:42,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=79, Invalid=1554, Unknown=7, NotChecked=0, Total=1640 [2018-09-30 23:52:42,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 23:52:42,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 23:52:42,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 23:52:42,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2018-09-30 23:52:42,577 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 41 [2018-09-30 23:52:42,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:42,578 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2018-09-30 23:52:42,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 23:52:42,578 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2018-09-30 23:52:42,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 23:52:42,578 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:42,578 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-30 23:52:42,579 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:42,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:42,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495814, now seen corresponding path program 36 times [2018-09-30 23:52:42,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:42,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:42,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:42,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:42,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 774 refuted. 6 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:02,851 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:02,851 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:02,860 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:53:02,897 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-09-30 23:53:02,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:02,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 774 refuted. 6 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:02,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:02,937 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 23:53:02,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 23:53:02,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 23:53:02,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1634, Unknown=7, NotChecked=0, Total=1722 [2018-09-30 23:53:02,938 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 42 states. [2018-09-30 23:53:21,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:21,701 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2018-09-30 23:53:21,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 23:53:21,702 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-30 23:53:21,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:21,702 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:53:21,703 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:53:21,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=81, Invalid=1634, Unknown=7, NotChecked=0, Total=1722 [2018-09-30 23:53:21,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:53:21,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 23:53:21,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 23:53:21,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2018-09-30 23:53:21,708 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 42 [2018-09-30 23:53:21,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:21,708 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2018-09-30 23:53:21,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 23:53:21,708 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2018-09-30 23:53:21,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 23:53:21,709 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:21,709 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-30 23:53:21,709 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:21,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:21,709 INFO L82 PathProgramCache]: Analyzing trace with hash -692041594, now seen corresponding path program 37 times [2018-09-30 23:53:21,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:21,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:21,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:21,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:21,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 854 refuted. 7 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:45,824 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:45,824 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:45,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:45,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 854 refuted. 7 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:45,892 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:45,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 23:53:45,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 23:53:45,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 23:53:45,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1798, Unknown=9, NotChecked=0, Total=1892 [2018-09-30 23:53:45,893 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 44 states. [2018-09-30 23:54:08,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:08,224 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2018-09-30 23:54:08,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 23:54:08,224 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-30 23:54:08,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:08,225 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:54:08,225 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:54:08,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=85, Invalid=1798, Unknown=9, NotChecked=0, Total=1892 [2018-09-30 23:54:08,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:54:08,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 23:54:08,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 23:54:08,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2018-09-30 23:54:08,229 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 44 [2018-09-30 23:54:08,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:08,230 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2018-09-30 23:54:08,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 23:54:08,230 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2018-09-30 23:54:08,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 23:54:08,230 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:08,230 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-30 23:54:08,230 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:08,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:08,231 INFO L82 PathProgramCache]: Analyzing trace with hash 21543200, now seen corresponding path program 38 times [2018-09-30 23:54:08,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:08,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:08,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:08,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:54:08,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 896 refuted. 7 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:39,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:39,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:39,581 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:54:39,609 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:54:39,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:39,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:39,646 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 896 refuted. 7 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:39,666 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:39,667 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 23:54:39,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 23:54:39,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 23:54:39,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1881, Unknown=12, NotChecked=0, Total=1980 [2018-09-30 23:54:39,668 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 45 states. [2018-09-30 23:54:59,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:59,388 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2018-09-30 23:54:59,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 23:54:59,389 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-30 23:54:59,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:59,389 INFO L225 Difference]: With dead ends: 56 [2018-09-30 23:54:59,390 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 23:54:59,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=87, Invalid=1881, Unknown=12, NotChecked=0, Total=1980 [2018-09-30 23:54:59,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 23:54:59,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 23:54:59,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 23:54:59,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2018-09-30 23:54:59,396 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 45 [2018-09-30 23:54:59,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:59,396 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2018-09-30 23:54:59,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 23:54:59,396 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2018-09-30 23:54:59,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 23:54:59,397 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:59,397 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-30 23:54:59,397 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:59,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:59,398 INFO L82 PathProgramCache]: Analyzing trace with hash 667835334, now seen corresponding path program 39 times [2018-09-30 23:54:59,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:59,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:59,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:59,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:59,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 943 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:18,320 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:18,320 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:18,328 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:55:18,367 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-09-30 23:55:18,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:18,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:18,399 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 943 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:18,420 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:18,420 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 23:55:18,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 23:55:18,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 23:55:18,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1975, Unknown=6, NotChecked=0, Total=2070 [2018-09-30 23:55:18,421 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 46 states. [2018-09-30 23:55:35,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:35,507 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2018-09-30 23:55:35,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 23:55:35,508 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-30 23:55:35,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:35,508 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:55:35,509 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:55:35,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=89, Invalid=1975, Unknown=6, NotChecked=0, Total=2070 [2018-09-30 23:55:35,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:55:35,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 23:55:35,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 23:55:35,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2018-09-30 23:55:35,513 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 46 [2018-09-30 23:55:35,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:35,514 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2018-09-30 23:55:35,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 23:55:35,514 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2018-09-30 23:55:35,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 23:55:35,514 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:35,514 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-30 23:55:35,514 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:35,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:35,515 INFO L82 PathProgramCache]: Analyzing trace with hash -771944992, now seen corresponding path program 40 times [2018-09-30 23:55:35,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:35,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:35,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:35,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:35,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:35,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:59,443 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 986 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:59,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:59,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:59,451 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:55:59,480 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:55:59,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:59,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 986 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:59,517 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:59,517 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 23:55:59,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 23:55:59,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 23:55:59,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2063, Unknown=8, NotChecked=0, Total=2162 [2018-09-30 23:55:59,518 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 47 states. [2018-09-30 23:56:18,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:18,935 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2018-09-30 23:56:18,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:56:18,935 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-30 23:56:18,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:18,936 INFO L225 Difference]: With dead ends: 58 [2018-09-30 23:56:18,936 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 23:56:18,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=91, Invalid=2063, Unknown=8, NotChecked=0, Total=2162 [2018-09-30 23:56:18,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 23:56:18,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 23:56:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 23:56:18,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2018-09-30 23:56:18,943 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 47 [2018-09-30 23:56:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:18,943 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2018-09-30 23:56:18,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 23:56:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2018-09-30 23:56:18,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 23:56:18,944 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:18,944 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-30 23:56:18,944 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:18,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:18,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505158, now seen corresponding path program 41 times [2018-09-30 23:56:18,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:18,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:18,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:18,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:18,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:39,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1031 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:39,459 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:39,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:39,466 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:56:39,503 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 23:56:39,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:39,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:39,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1031 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:39,541 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:39,541 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 23:56:39,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 23:56:39,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 23:56:39,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2156, Unknown=7, NotChecked=0, Total=2256 [2018-09-30 23:56:39,542 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 48 states. [2018-09-30 23:57:00,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:00,524 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2018-09-30 23:57:00,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 23:57:00,524 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-30 23:57:00,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:00,525 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:57:00,525 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:57:00,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=93, Invalid=2156, Unknown=7, NotChecked=0, Total=2256 [2018-09-30 23:57:00,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:57:00,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 23:57:00,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 23:57:00,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2018-09-30 23:57:00,530 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 48 [2018-09-30 23:57:00,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:00,530 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2018-09-30 23:57:00,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 23:57:00,530 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2018-09-30 23:57:00,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 23:57:00,531 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:00,531 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-30 23:57:00,531 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:00,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:00,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081184, now seen corresponding path program 42 times [2018-09-30 23:57:00,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:00,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:00,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:00,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:00,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:16,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1078 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:16,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:16,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:16,816 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:16,854 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-09-30 23:57:16,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:16,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1078 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:16,894 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:16,894 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 23:57:16,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 23:57:16,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 23:57:16,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2253, Unknown=4, NotChecked=0, Total=2352 [2018-09-30 23:57:16,895 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 49 states. [2018-09-30 23:57:32,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:32,638 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2018-09-30 23:57:32,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:57:32,638 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-30 23:57:32,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:32,639 INFO L225 Difference]: With dead ends: 60 [2018-09-30 23:57:32,639 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 23:57:32,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=95, Invalid=2253, Unknown=4, NotChecked=0, Total=2352 [2018-09-30 23:57:32,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 23:57:32,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 23:57:32,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 23:57:32,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2018-09-30 23:57:32,646 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 49 [2018-09-30 23:57:32,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:32,646 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2018-09-30 23:57:32,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 23:57:32,646 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2018-09-30 23:57:32,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 23:57:32,646 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:32,647 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-30 23:57:32,647 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:32,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:32,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192826, now seen corresponding path program 43 times [2018-09-30 23:57:32,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:32,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:32,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:32,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:32,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1124 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:56,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:56,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:56,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:56,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:56,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1124 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:56,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:56,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 23:57:56,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:57:56,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:57:56,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2345, Unknown=8, NotChecked=0, Total=2450 [2018-09-30 23:57:56,461 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 50 states. [2018-09-30 23:58:21,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:21,200 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2018-09-30 23:58:21,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 23:58:21,201 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-30 23:58:21,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:21,202 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:58:21,202 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:58:21,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=97, Invalid=2345, Unknown=8, NotChecked=0, Total=2450 [2018-09-30 23:58:21,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:58:21,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 23:58:21,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 23:58:21,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2018-09-30 23:58:21,206 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 50 [2018-09-30 23:58:21,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:21,207 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2018-09-30 23:58:21,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:58:21,207 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2018-09-30 23:58:21,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 23:58:21,207 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:21,207 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-30 23:58:21,208 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:21,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:21,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1250314874, now seen corresponding path program 44 times [2018-09-30 23:58:21,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:21,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:21,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:21,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:21,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1218 refuted. 7 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:47,416 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:47,416 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:47,426 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:47,459 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:47,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:47,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:47,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1218 refuted. 7 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:47,498 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:47,499 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 23:58:47,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 23:58:47,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 23:58:47,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2543, Unknown=8, NotChecked=0, Total=2652 [2018-09-30 23:58:47,500 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 52 states. [2018-09-30 23:59:16,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:16,687 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2018-09-30 23:59:16,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 23:59:16,688 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-30 23:59:16,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:16,689 INFO L225 Difference]: With dead ends: 63 [2018-09-30 23:59:16,689 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 23:59:16,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=101, Invalid=2543, Unknown=8, NotChecked=0, Total=2652 [2018-09-30 23:59:16,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 23:59:16,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 23:59:16,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 23:59:16,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2018-09-30 23:59:16,694 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 52 [2018-09-30 23:59:16,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:16,694 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2018-09-30 23:59:16,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 23:59:16,694 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2018-09-30 23:59:16,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 23:59:16,695 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:16,695 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-30 23:59:16,695 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:16,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:16,695 INFO L82 PathProgramCache]: Analyzing trace with hash -105059296, now seen corresponding path program 45 times [2018-09-30 23:59:16,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:16,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:16,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:16,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:16,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1267 refuted. 8 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:47,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:47,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:47,524 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:47,577 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2018-09-30 23:59:47,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:47,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1267 refuted. 8 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:47,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:47,615 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 23:59:47,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 23:59:47,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 23:59:47,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2642, Unknown=11, NotChecked=0, Total=2756 [2018-09-30 23:59:47,616 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 53 states. [2018-10-01 00:00:10,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:10,656 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2018-10-01 00:00:10,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-01 00:00:10,656 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-10-01 00:00:10,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:10,657 INFO L225 Difference]: With dead ends: 64 [2018-10-01 00:00:10,657 INFO L226 Difference]: Without dead ends: 62 [2018-10-01 00:00:10,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=103, Invalid=2642, Unknown=11, NotChecked=0, Total=2756 [2018-10-01 00:00:10,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-01 00:00:10,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-01 00:00:10,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-01 00:00:10,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2018-10-01 00:00:10,662 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 53 [2018-10-01 00:00:10,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:10,663 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2018-10-01 00:00:10,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-01 00:00:10,663 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2018-10-01 00:00:10,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-01 00:00:10,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:10,663 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-10-01 00:00:10,663 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:10,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:10,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125254, now seen corresponding path program 46 times [2018-10-01 00:00:10,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:10,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:10,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:10,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:10,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1316 refuted. 10 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:49,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:49,439 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:49,447 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:00:49,480 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:00:49,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:49,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1316 refuted. 10 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:49,534 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:49,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-01 00:00:49,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-01 00:00:49,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-01 00:00:49,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2742, Unknown=15, NotChecked=0, Total=2862 [2018-10-01 00:00:49,535 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 54 states. Received shutdown request... [2018-10-01 00:01:15,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-01 00:01:15,233 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-01 00:01:15,239 WARN L206 ceAbstractionStarter]: Timeout [2018-10-01 00:01:15,240 INFO L202 PluginConnector]: Adding new model AnnoyingVillain.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.10 12:01:15 BoogieIcfgContainer [2018-10-01 00:01:15,240 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-01 00:01:15,241 INFO L168 Benchmark]: Toolchain (without parser) took 873722.90 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 61.9 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 372.5 MB). Peak memory consumption was 434.3 MB. Max. memory is 7.1 GB. [2018-10-01 00:01:15,243 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:01:15,243 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.87 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:01:15,243 INFO L168 Benchmark]: Boogie Preprocessor took 22.57 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:01:15,244 INFO L168 Benchmark]: RCFGBuilder took 261.47 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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. [2018-10-01 00:01:15,244 INFO L168 Benchmark]: TraceAbstraction took 873392.02 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 61.9 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 351.3 MB). Peak memory consumption was 413.2 MB. Max. memory is 7.1 GB. [2018-10-01 00:01:15,247 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.87 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.57 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 261.47 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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 873392.02 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 61.9 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 351.3 MB). Peak memory consumption was 413.2 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 (62states) and FLOYD_HOARE automaton (currently 48 states, 54 states before enhancement), while ReachableStatesComputation was computing reachable states (46 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 873.3s OverallTime, 47 OverallIterations, 51 TraceHistogramMax, 393.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 147 SDtfs, 68 SDslu, 1166 SDs, 0 SdLazy, 44198 SolverSat, 53 SolverUnsat, 157 SolverUnknown, 0 SolverNotchecked, 383.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2533 GetRequests, 1251 SyntacticMatches, 45 SemanticMatches, 1237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 474.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=46, 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: 0.2s AutomataMinimizationTime, 46 MinimizatonAttempts, 13 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 476.0s InterpolantComputationTime, 2611 NumberOfCodeBlocks, 2611 NumberOfCodeBlocksAsserted, 396 NumberOfCheckSat, 2518 ConstructedInterpolants, 0 QuantifiedInterpolants, 945992 SizeOfPredicates, 45 NumberOfNonLiveVariables, 5078 ConjunctsInSsa, 2424 ConjunctsInUnsatCore, 93 InterpolantComputations, 1 PerfectInterpolantSequences, 1/40932 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-0-2018-10-01_00-01-15-258.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/AnnoyingVillain.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-01_00-01-15-258.csv Completed graceful shutdown