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_PUPT.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f-m [2018-10-04 14:37:50,215 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 14:37:50,217 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 14:37:50,231 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 14:37:50,231 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 14:37:50,232 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 14:37:50,234 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 14:37:50,236 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 14:37:50,238 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 14:37:50,240 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 14:37:50,241 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 14:37:50,275 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-04 14:37:50,299 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 14:37:50,299 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 14:37:50,300 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 14:37:50,300 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 14:37:50,301 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 14:37:50,301 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 14:37:50,301 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 14:37:50,302 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 14:37:50,302 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 14:37:50,302 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 14:37:50,302 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 14:37:50,302 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 14:37:50,303 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 14:37:50,303 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 14:37:50,303 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 14:37:50,303 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 14:37:50,303 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 14:37:50,305 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 14:37:50,305 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 14:37:50,305 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 14:37:50,305 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 14:37:50,305 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 14:37:50,306 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 14:37:50,306 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 14:37:50,306 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 14:37:50,306 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 14:37:50,306 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 14:37:50,307 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 14:37:50,307 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 14:37:50,307 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 14:37:50,308 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 14:37:50,372 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 14:37:50,385 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 14:37:50,393 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 14:37:50,395 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 14:37:50,395 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 14:37:50,396 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl [2018-10-04 14:37:50,397 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl' [2018-10-04 14:37:50,438 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 14:37:50,440 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 14:37:50,441 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 14:37:50,441 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 14:37:50,441 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 14:37:50,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:37:50" (1/1) ... [2018-10-04 14:37:50,475 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:37:50" (1/1) ... [2018-10-04 14:37:50,480 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 14:37:50,480 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 14:37:50,480 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 14:37:50,482 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 14:37:50,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 14:37:50,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 14:37:50,483 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 14:37:50,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:37:50" (1/1) ... [2018-10-04 14:37:50,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:37:50" (1/1) ... [2018-10-04 14:37:50,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:37:50" (1/1) ... [2018-10-04 14:37:50,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:37:50" (1/1) ... [2018-10-04 14:37:50,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:37:50" (1/1) ... [2018-10-04 14:37:50,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:37:50" (1/1) ... [2018-10-04 14:37:50,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:37:50" (1/1) ... [2018-10-04 14:37:50,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 14:37:50,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 14:37:50,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 14:37:50,508 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 14:37:50,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:37:50" (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 [2018-10-04 14:37:50,582 INFO L130 BoogieDeclarations]: Found specification of procedure Main [2018-10-04 14:37:50,582 INFO L138 BoogieDeclarations]: Found implementation of procedure Main [2018-10-04 14:37:50,820 INFO L338 CfgBuilder]: Using library mode [2018-10-04 14:37:50,821 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:37:50 BoogieIcfgContainer [2018-10-04 14:37:50,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 14:37:50,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 14:37:50,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 14:37:50,825 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 14:37:50,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:37:50" (1/2) ... [2018-10-04 14:37:50,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16001a22 and model type doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 02:37:50, skipping insertion in model container [2018-10-04 14:37:50,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:37:50" (2/2) ... [2018-10-04 14:37:50,828 INFO L112 eAbstractionObserver]: Analyzing ICFG doubleLoopUniformIterations.bpl [2018-10-04 14:37:50,836 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 14:37:50,844 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-10-04 14:37:50,893 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 14:37:50,894 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 14:37:50,894 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 14:37:50,894 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 14:37:50,894 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 14:37:50,894 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 14:37:50,895 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 14:37:50,895 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 14:37:50,895 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 14:37:50,910 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-10-04 14:37:50,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 14:37:50,916 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:50,917 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 14:37:50,919 INFO L423 AbstractCegarLoop]: === Iteration 1 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:50,925 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:50,926 INFO L82 PathProgramCache]: Analyzing trace with hash 926725, now seen corresponding path program 1 times [2018-10-04 14:37:50,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:50,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:50,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:50,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:50,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:51,062 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 14:37:51,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-04 14:37:51,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 14:37:51,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 14:37:51,080 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:51,083 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2018-10-04 14:37:51,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:51,177 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-10-04 14:37:51,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 14:37:51,179 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-04 14:37:51,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:51,195 INFO L225 Difference]: With dead ends: 17 [2018-10-04 14:37:51,195 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 14:37:51,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 14:37:51,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 14:37:51,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 14:37:51,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 14:37:51,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-10-04 14:37:51,270 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 4 [2018-10-04 14:37:51,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:51,271 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-10-04 14:37:51,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 14:37:51,271 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-10-04 14:37:51,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 14:37:51,272 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:51,272 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-04 14:37:51,280 INFO L423 AbstractCegarLoop]: === Iteration 2 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:51,280 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:51,281 INFO L82 PathProgramCache]: Analyzing trace with hash 28728519, now seen corresponding path program 1 times [2018-10-04 14:37:51,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:51,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:51,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:51,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:51,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:51,343 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 14:37:51,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-04 14:37:51,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 14:37:51,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 14:37:51,345 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:51,345 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 3 states. [2018-10-04 14:37:51,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:51,394 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-04 14:37:51,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 14:37:51,395 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-10-04 14:37:51,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:51,396 INFO L225 Difference]: With dead ends: 11 [2018-10-04 14:37:51,396 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 14:37:51,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 14:37:51,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 14:37:51,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 14:37:51,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 14:37:51,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-10-04 14:37:51,405 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-10-04 14:37:51,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:51,405 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-10-04 14:37:51,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 14:37:51,406 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-10-04 14:37:51,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 14:37:51,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:51,407 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-04 14:37:51,407 INFO L423 AbstractCegarLoop]: === Iteration 3 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:51,407 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:51,407 INFO L82 PathProgramCache]: Analyzing trace with hash 891297133, now seen corresponding path program 1 times [2018-10-04 14:37:51,408 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:51,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:51,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:51,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:51,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:51,485 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 14:37:51,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 14:37:51,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 14:37:51,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 14:37:51,486 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:51,486 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-10-04 14:37:51,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:51,540 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-04 14:37:51,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 14:37:51,541 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 14:37:51,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:51,541 INFO L225 Difference]: With dead ends: 11 [2018-10-04 14:37:51,542 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 14:37:51,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 2 [2018-10-04 14:37:51,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 14:37:51,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 14:37:51,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 14:37:51,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-10-04 14:37:51,545 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-10-04 14:37:51,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:51,545 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-10-04 14:37:51,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 14:37:51,546 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-10-04 14:37:51,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 14:37:51,546 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:51,546 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-04 14:37:51,547 INFO L423 AbstractCegarLoop]: === Iteration 4 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:51,547 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:51,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1860345825, now seen corresponding path program 1 times [2018-10-04 14:37:51,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:51,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:51,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:51,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:51,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:51,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:51,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:51,652 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 [2018-10-04 14:37:51,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:51,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:51,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:51,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-10-04 14:37:51,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 14:37:51,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 14:37:51,959 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:51,959 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2018-10-04 14:37:52,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:52,094 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2018-10-04 14:37:52,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 14:37:52,095 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-10-04 14:37:52,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:52,096 INFO L225 Difference]: With dead ends: 14 [2018-10-04 14:37:52,096 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 14:37:52,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 2 [2018-10-04 14:37:52,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 14:37:52,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2018-10-04 14:37:52,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 14:37:52,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-10-04 14:37:52,100 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2018-10-04 14:37:52,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:52,100 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-10-04 14:37:52,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 14:37:52,101 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-10-04 14:37:52,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 14:37:52,101 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:52,101 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-04 14:37:52,102 INFO L423 AbstractCegarLoop]: === Iteration 5 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:52,102 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:52,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1836084205, now seen corresponding path program 2 times [2018-10-04 14:37:52,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:52,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:52,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:52,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:52,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:52,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:52,194 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 [2018-10-04 14:37:52,205 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:37:52,242 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:37:52,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:52,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:52,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:52,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 14:37:52,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 14:37:52,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 14:37:52,371 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:52,371 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2018-10-04 14:37:52,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:52,533 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2018-10-04 14:37:52,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 14:37:52,534 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 14:37:52,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:52,534 INFO L225 Difference]: With dead ends: 15 [2018-10-04 14:37:52,535 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 14:37:52,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 3 [2018-10-04 14:37:52,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 14:37:52,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 14:37:52,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 14:37:52,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-04 14:37:52,538 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 8 [2018-10-04 14:37:52,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:52,539 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-04 14:37:52,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 14:37:52,540 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-04 14:37:52,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 14:37:52,541 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:52,541 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-04 14:37:52,542 INFO L423 AbstractCegarLoop]: === Iteration 6 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:52,542 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:52,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1860095751, now seen corresponding path program 3 times [2018-10-04 14:37:52,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:52,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:52,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:52,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:52,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:52,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:52,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:37:52,659 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:37:52,671 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-04 14:37:52,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:52,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:52,738 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:52,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 14:37:52,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 14:37:52,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 14:37:52,739 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:52,739 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-10-04 14:37:52,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:52,797 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-10-04 14:37:52,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 14:37:52,798 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 14:37:52,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:52,798 INFO L225 Difference]: With dead ends: 13 [2018-10-04 14:37:52,799 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 14:37:52,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 3 [2018-10-04 14:37:52,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 14:37:52,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 14:37:52,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 14:37:52,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-10-04 14:37:52,802 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2018-10-04 14:37:52,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:52,803 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-10-04 14:37:52,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 14:37:52,803 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2018-10-04 14:37:52,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 14:37:52,803 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:52,804 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2018-10-04 14:37:52,804 INFO L423 AbstractCegarLoop]: === Iteration 7 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:52,804 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:52,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1828331911, now seen corresponding path program 4 times [2018-10-04 14:37:52,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:52,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:52,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:52,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:52,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:52,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:52,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:52,941 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 [2018-10-04 14:37:52,950 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:37:52,959 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:37:52,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:52,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:53,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:53,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 14:37:53,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 14:37:53,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 14:37:53,031 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:53,031 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2018-10-04 14:37:53,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:53,183 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-10-04 14:37:53,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 14:37:53,184 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-10-04 14:37:53,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:53,185 INFO L225 Difference]: With dead ends: 17 [2018-10-04 14:37:53,185 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 14:37:53,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 3 [2018-10-04 14:37:53,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 14:37:53,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2018-10-04 14:37:53,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 14:37:53,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-10-04 14:37:53,189 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-10-04 14:37:53,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:53,189 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-10-04 14:37:53,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 14:37:53,190 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-10-04 14:37:53,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 14:37:53,190 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:53,190 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-10-04 14:37:53,191 INFO L423 AbstractCegarLoop]: === Iteration 8 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:53,191 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:53,191 INFO L82 PathProgramCache]: Analyzing trace with hash 843652871, now seen corresponding path program 5 times [2018-10-04 14:37:53,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:53,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:53,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:53,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:53,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:53,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:53,248 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 [2018-10-04 14:37:53,257 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:37:53,266 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-10-04 14:37:53,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:53,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:53,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:53,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 14:37:53,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 14:37:53,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 14:37:53,324 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:53,324 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2018-10-04 14:37:53,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:53,372 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2018-10-04 14:37:53,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 14:37:53,372 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-04 14:37:53,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:53,373 INFO L225 Difference]: With dead ends: 18 [2018-10-04 14:37:53,373 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 14:37:53,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 3 [2018-10-04 14:37:53,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 14:37:53,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 14:37:53,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 14:37:53,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-04 14:37:53,376 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2018-10-04 14:37:53,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:53,376 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-04 14:37:53,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 14:37:53,376 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-04 14:37:53,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 14:37:53,377 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:53,377 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-10-04 14:37:53,377 INFO L423 AbstractCegarLoop]: === Iteration 9 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:53,377 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:53,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1588010797, now seen corresponding path program 6 times [2018-10-04 14:37:53,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:53,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:53,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:53,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:53,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:53,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:53,490 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:37:53,498 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:37:53,506 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-10-04 14:37:53,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:53,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:53,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:53,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 14:37:53,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 14:37:53,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 14:37:53,575 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:53,575 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2018-10-04 14:37:53,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:53,703 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2018-10-04 14:37:53,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 14:37:53,704 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-04 14:37:53,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:53,705 INFO L225 Difference]: With dead ends: 15 [2018-10-04 14:37:53,705 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 14:37:53,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 4 [2018-10-04 14:37:53,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 14:37:53,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-04 14:37:53,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 14:37:53,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-10-04 14:37:53,709 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2018-10-04 14:37:53,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:53,709 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-10-04 14:37:53,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 14:37:53,709 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-10-04 14:37:53,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 14:37:53,710 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:53,710 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2018-10-04 14:37:53,711 INFO L423 AbstractCegarLoop]: === Iteration 10 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:53,711 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:53,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1983632929, now seen corresponding path program 7 times [2018-10-04 14:37:53,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:53,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:53,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:53,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:53,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:54,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:54,127 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 [2018-10-04 14:37:54,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:54,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:54,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:54,216 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:54,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 14:37:54,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 14:37:54,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 14:37:54,217 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:54,218 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2018-10-04 14:37:54,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:54,308 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-10-04 14:37:54,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 14:37:54,309 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-10-04 14:37:54,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:54,309 INFO L225 Difference]: With dead ends: 20 [2018-10-04 14:37:54,310 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 14:37:54,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 4 [2018-10-04 14:37:54,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 14:37:54,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-10-04 14:37:54,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 14:37:54,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-04 14:37:54,313 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-10-04 14:37:54,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:54,313 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-04 14:37:54,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 14:37:54,314 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-04 14:37:54,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 14:37:54,314 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:54,314 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-10-04 14:37:54,314 INFO L423 AbstractCegarLoop]: === Iteration 11 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:54,315 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:54,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1363017133, now seen corresponding path program 8 times [2018-10-04 14:37:54,315 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:54,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:54,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:54,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:54,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:54,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:54,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:54,557 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 [2018-10-04 14:37:54,569 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:37:54,588 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:37:54,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:54,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:54,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:54,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 14:37:54,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 14:37:54,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 14:37:54,653 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:54,654 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 7 states. [2018-10-04 14:37:54,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:54,690 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-10-04 14:37:54,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 14:37:54,691 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-04 14:37:54,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:54,691 INFO L225 Difference]: With dead ends: 21 [2018-10-04 14:37:54,691 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 14:37:54,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 4 [2018-10-04 14:37:54,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 14:37:54,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 14:37:54,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 14:37:54,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-04 14:37:54,695 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 12 [2018-10-04 14:37:54,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:54,696 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-04 14:37:54,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 14:37:54,696 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-04 14:37:54,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 14:37:54,697 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:54,697 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-10-04 14:37:54,697 INFO L423 AbstractCegarLoop]: === Iteration 12 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:54,697 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:54,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1331690937, now seen corresponding path program 9 times [2018-10-04 14:37:54,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:54,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:54,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:54,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:54,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:54,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:54,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:54,789 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 [2018-10-04 14:37:54,797 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:37:54,805 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 14:37:54,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:54,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:54,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:54,863 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:54,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 14:37:54,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 14:37:54,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 14:37:54,864 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:54,864 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2018-10-04 14:37:54,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:54,927 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-10-04 14:37:54,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 14:37:54,927 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-04 14:37:54,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:54,928 INFO L225 Difference]: With dead ends: 17 [2018-10-04 14:37:54,928 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 14:37:54,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 5 [2018-10-04 14:37:54,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 14:37:54,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 14:37:54,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 14:37:54,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-10-04 14:37:54,933 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2018-10-04 14:37:54,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:54,933 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-10-04 14:37:54,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 14:37:54,934 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-10-04 14:37:54,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 14:37:54,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:54,934 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2018-10-04 14:37:54,935 INFO L423 AbstractCegarLoop]: === Iteration 13 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:54,935 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:54,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1667192391, now seen corresponding path program 10 times [2018-10-04 14:37:54,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:54,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:54,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:54,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:54,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:55,037 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:55,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:55,038 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 [2018-10-04 14:37:55,047 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:37:55,056 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:37:55,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:55,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:55,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:55,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:55,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 14:37:55,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 14:37:55,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 14:37:55,161 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:55,161 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2018-10-04 14:37:55,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:55,254 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-10-04 14:37:55,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 14:37:55,255 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-10-04 14:37:55,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:55,256 INFO L225 Difference]: With dead ends: 23 [2018-10-04 14:37:55,256 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 14:37:55,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 5 [2018-10-04 14:37:55,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 14:37:55,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2018-10-04 14:37:55,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 14:37:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-04 14:37:55,262 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-10-04 14:37:55,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:55,262 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-04 14:37:55,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 14:37:55,262 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-04 14:37:55,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 14:37:55,263 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:55,263 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-10-04 14:37:55,264 INFO L423 AbstractCegarLoop]: === Iteration 14 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:55,264 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:55,264 INFO L82 PathProgramCache]: Analyzing trace with hash 143295047, now seen corresponding path program 11 times [2018-10-04 14:37:55,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:55,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:55,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:55,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:55,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:55,403 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:55,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:55,404 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 [2018-10-04 14:37:55,414 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:37:55,426 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 14:37:55,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:55,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:55,469 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:55,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:55,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 14:37:55,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 14:37:55,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 14:37:55,491 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:55,491 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2018-10-04 14:37:55,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:55,550 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2018-10-04 14:37:55,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 14:37:55,550 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-04 14:37:55,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:55,551 INFO L225 Difference]: With dead ends: 24 [2018-10-04 14:37:55,551 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 14:37:55,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 5 [2018-10-04 14:37:55,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 14:37:55,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 14:37:55,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 14:37:55,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-04 14:37:55,555 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 14 [2018-10-04 14:37:55,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:55,556 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-04 14:37:55,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 14:37:55,556 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-04 14:37:55,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 14:37:55,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:55,557 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-10-04 14:37:55,557 INFO L423 AbstractCegarLoop]: === Iteration 15 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:55,557 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:55,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1788276499, now seen corresponding path program 12 times [2018-10-04 14:37:55,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:55,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:55,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:55,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:55,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:55,657 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:55,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:55,658 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:37:55,666 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:37:55,676 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-04 14:37:55,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:55,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:55,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:55,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 14:37:55,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 14:37:55,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 14:37:55,762 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:55,762 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-10-04 14:37:55,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:55,790 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-10-04 14:37:55,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 14:37:55,791 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-04 14:37:55,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:55,791 INFO L225 Difference]: With dead ends: 19 [2018-10-04 14:37:55,792 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 14:37:55,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 6 [2018-10-04 14:37:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 14:37:55,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 14:37:55,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 14:37:55,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-10-04 14:37:55,795 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2018-10-04 14:37:55,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:55,796 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-10-04 14:37:55,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 14:37:55,796 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-10-04 14:37:55,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 14:37:55,797 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:55,797 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2018-10-04 14:37:55,797 INFO L423 AbstractCegarLoop]: === Iteration 16 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:55,797 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:55,798 INFO L82 PathProgramCache]: Analyzing trace with hash 397941857, now seen corresponding path program 13 times [2018-10-04 14:37:55,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:55,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:55,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:55,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:55,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:55,895 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:55,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:37:55,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:55,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:55,987 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:55,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 14:37:55,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 14:37:55,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 14:37:55,988 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:55,988 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 8 states. [2018-10-04 14:37:56,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:56,152 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-10-04 14:37:56,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 14:37:56,153 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-10-04 14:37:56,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:56,154 INFO L225 Difference]: With dead ends: 26 [2018-10-04 14:37:56,154 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 14:37:56,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 6 [2018-10-04 14:37:56,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 14:37:56,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-10-04 14:37:56,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 14:37:56,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-10-04 14:37:56,160 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2018-10-04 14:37:56,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:56,160 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-10-04 14:37:56,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 14:37:56,161 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-10-04 14:37:56,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 14:37:56,161 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:56,162 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-10-04 14:37:56,162 INFO L423 AbstractCegarLoop]: === Iteration 17 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:56,162 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:56,162 INFO L82 PathProgramCache]: Analyzing trace with hash -548765843, now seen corresponding path program 14 times [2018-10-04 14:37:56,162 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:56,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:56,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:56,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:56,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:56,325 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:56,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:56,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:37:56,334 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:37:56,360 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:37:56,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:56,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:56,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:56,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 14:37:56,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 14:37:56,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 14:37:56,444 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:56,444 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2018-10-04 14:37:56,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:56,544 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-10-04 14:37:56,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 14:37:56,545 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-04 14:37:56,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:56,546 INFO L225 Difference]: With dead ends: 27 [2018-10-04 14:37:56,546 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 14:37:56,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 6 [2018-10-04 14:37:56,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 14:37:56,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 14:37:56,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 14:37:56,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-04 14:37:56,551 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 16 [2018-10-04 14:37:56,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:56,551 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-04 14:37:56,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 14:37:56,551 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-04 14:37:56,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 14:37:56,552 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:56,552 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-10-04 14:37:56,552 INFO L423 AbstractCegarLoop]: === Iteration 18 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:56,552 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:56,553 INFO L82 PathProgramCache]: Analyzing trace with hash -297941625, now seen corresponding path program 15 times [2018-10-04 14:37:56,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:56,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:56,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:56,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:56,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:56,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:56,631 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 [2018-10-04 14:37:56,640 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:37:56,651 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 14:37:56,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:56,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:56,753 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:56,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:56,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 14:37:56,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 14:37:56,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 14:37:56,775 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:56,775 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-10-04 14:37:56,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:56,818 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-04 14:37:56,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 14:37:56,819 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-04 14:37:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:56,820 INFO L225 Difference]: With dead ends: 21 [2018-10-04 14:37:56,820 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 14:37:56,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 7 [2018-10-04 14:37:56,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 14:37:56,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-04 14:37:56,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 14:37:56,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-10-04 14:37:56,825 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2018-10-04 14:37:56,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:56,825 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-10-04 14:37:56,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 14:37:56,827 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-10-04 14:37:56,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 14:37:56,827 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:56,827 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2018-10-04 14:37:56,828 INFO L423 AbstractCegarLoop]: === Iteration 19 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:56,828 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:56,828 INFO L82 PathProgramCache]: Analyzing trace with hash -646317305, now seen corresponding path program 16 times [2018-10-04 14:37:56,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:56,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:56,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:56,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:56,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:56,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:56,941 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 [2018-10-04 14:37:56,951 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:37:56,979 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:37:56,979 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:56,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:57,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:57,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 14:37:57,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 14:37:57,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 14:37:57,246 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:57,247 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2018-10-04 14:37:57,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:57,386 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-10-04 14:37:57,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 14:37:57,386 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2018-10-04 14:37:57,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:57,387 INFO L225 Difference]: With dead ends: 29 [2018-10-04 14:37:57,387 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 14:37:57,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.0s impTime 7 [2018-10-04 14:37:57,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 14:37:57,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2018-10-04 14:37:57,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 14:37:57,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-04 14:37:57,392 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-10-04 14:37:57,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:57,392 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-04 14:37:57,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 14:37:57,392 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-04 14:37:57,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 14:37:57,397 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:57,397 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-10-04 14:37:57,397 INFO L423 AbstractCegarLoop]: === Iteration 20 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:57,398 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:57,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1438938503, now seen corresponding path program 17 times [2018-10-04 14:37:57,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:57,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:57,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:57,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:57,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:57,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:57,493 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 [2018-10-04 14:37:57,501 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:37:57,528 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-04 14:37:57,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:57,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:57,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:57,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 14:37:57,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 14:37:57,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 14:37:57,610 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:57,610 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2018-10-04 14:37:57,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:57,719 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-10-04 14:37:57,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 14:37:57,719 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-04 14:37:57,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:57,719 INFO L225 Difference]: With dead ends: 30 [2018-10-04 14:37:57,719 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 14:37:57,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 7 [2018-10-04 14:37:57,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 14:37:57,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 14:37:57,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 14:37:57,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-04 14:37:57,724 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2018-10-04 14:37:57,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:57,724 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-04 14:37:57,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 14:37:57,724 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-04 14:37:57,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 14:37:57,725 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:57,725 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-10-04 14:37:57,725 INFO L423 AbstractCegarLoop]: === Iteration 21 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:57,725 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:57,726 INFO L82 PathProgramCache]: Analyzing trace with hash 624554669, now seen corresponding path program 18 times [2018-10-04 14:37:57,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:57,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:57,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:57,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:57,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:57,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:57,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:37:57,843 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:37:57,871 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-04 14:37:57,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:57,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:58,045 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:58,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 14:37:58,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 14:37:58,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 14:37:58,046 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:58,046 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2018-10-04 14:37:58,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:58,080 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-10-04 14:37:58,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 14:37:58,081 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-04 14:37:58,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:58,082 INFO L225 Difference]: With dead ends: 23 [2018-10-04 14:37:58,082 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 14:37:58,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 8 [2018-10-04 14:37:58,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 14:37:58,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 14:37:58,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 14:37:58,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-10-04 14:37:58,086 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2018-10-04 14:37:58,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:58,086 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-10-04 14:37:58,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 14:37:58,086 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-10-04 14:37:58,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 14:37:58,087 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:58,087 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1] [2018-10-04 14:37:58,087 INFO L423 AbstractCegarLoop]: === Iteration 22 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:58,087 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:58,087 INFO L82 PathProgramCache]: Analyzing trace with hash -2113703263, now seen corresponding path program 19 times [2018-10-04 14:37:58,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:58,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:58,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:58,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:58,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:58,248 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:58,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:58,248 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 [2018-10-04 14:37:58,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:58,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:58,353 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:58,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:58,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 14:37:58,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 14:37:58,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 14:37:58,375 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:58,375 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2018-10-04 14:37:58,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:58,559 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-10-04 14:37:58,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 14:37:58,560 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2018-10-04 14:37:58,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:58,560 INFO L225 Difference]: With dead ends: 32 [2018-10-04 14:37:58,560 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 14:37:58,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 8 [2018-10-04 14:37:58,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 14:37:58,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-10-04 14:37:58,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 14:37:58,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-10-04 14:37:58,565 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2018-10-04 14:37:58,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:58,565 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-10-04 14:37:58,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 14:37:58,565 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-10-04 14:37:58,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 14:37:58,566 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:58,566 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-10-04 14:37:58,566 INFO L423 AbstractCegarLoop]: === Iteration 23 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:58,566 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:58,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1100353235, now seen corresponding path program 20 times [2018-10-04 14:37:58,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:58,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:58,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:58,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:58,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:59,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:59,007 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 [2018-10-04 14:37:59,015 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:37:59,028 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:37:59,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:59,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:59,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:59,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 14:37:59,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 14:37:59,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 14:37:59,116 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:59,116 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 11 states. [2018-10-04 14:37:59,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:59,198 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-10-04 14:37:59,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 14:37:59,199 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-04 14:37:59,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:59,199 INFO L225 Difference]: With dead ends: 33 [2018-10-04 14:37:59,200 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 14:37:59,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 8 [2018-10-04 14:37:59,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 14:37:59,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 14:37:59,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 14:37:59,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-04 14:37:59,204 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2018-10-04 14:37:59,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:59,205 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-04 14:37:59,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 14:37:59,205 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-04 14:37:59,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 14:37:59,205 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:59,206 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-10-04 14:37:59,206 INFO L423 AbstractCegarLoop]: === Iteration 24 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:59,206 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:59,206 INFO L82 PathProgramCache]: Analyzing trace with hash -576448313, now seen corresponding path program 21 times [2018-10-04 14:37:59,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:59,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:59,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:59,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:59,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:59,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:59,475 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 [2018-10-04 14:37:59,482 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:37:59,513 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-04 14:37:59,513 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:59,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:59,979 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:00,001 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:00,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 14:38:00,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 14:38:00,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 14:38:00,002 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:00,002 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2018-10-04 14:38:00,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:00,037 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-04 14:38:00,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 14:38:00,037 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-04 14:38:00,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:00,038 INFO L225 Difference]: With dead ends: 25 [2018-10-04 14:38:00,038 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 14:38:00,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.1s impTime 9 [2018-10-04 14:38:00,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 14:38:00,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 14:38:00,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 14:38:00,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-10-04 14:38:00,042 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2018-10-04 14:38:00,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:00,042 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-10-04 14:38:00,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 14:38:00,042 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-10-04 14:38:00,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-04 14:38:00,043 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:00,043 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1] [2018-10-04 14:38:00,043 INFO L423 AbstractCegarLoop]: === Iteration 25 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:00,043 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:00,044 INFO L82 PathProgramCache]: Analyzing trace with hash -690090041, now seen corresponding path program 22 times [2018-10-04 14:38:00,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:00,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:00,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:00,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:00,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:00,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:00,220 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 [2018-10-04 14:38:00,230 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:38:00,240 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:38:00,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:00,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:00,288 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:00,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:00,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 14:38:00,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 14:38:00,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 14:38:00,311 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:00,311 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2018-10-04 14:38:00,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:00,455 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2018-10-04 14:38:00,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 14:38:00,456 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2018-10-04 14:38:00,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:00,456 INFO L225 Difference]: With dead ends: 35 [2018-10-04 14:38:00,456 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 14:38:00,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 9 [2018-10-04 14:38:00,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 14:38:00,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2018-10-04 14:38:00,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 14:38:00,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-10-04 14:38:00,462 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2018-10-04 14:38:00,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:00,462 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-10-04 14:38:00,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 14:38:00,463 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-10-04 14:38:00,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 14:38:00,463 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:00,463 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-10-04 14:38:00,463 INFO L423 AbstractCegarLoop]: === Iteration 26 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:00,464 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:00,464 INFO L82 PathProgramCache]: Analyzing trace with hash 81983687, now seen corresponding path program 23 times [2018-10-04 14:38:00,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:00,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:00,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:00,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:00,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:01,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:01,420 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:38:01,428 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:38:01,447 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 14:38:01,447 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:01,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:01,588 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:01,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:01,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 14:38:01,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 14:38:01,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 14:38:01,618 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:01,618 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 12 states. [2018-10-04 14:38:01,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:01,685 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-10-04 14:38:01,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 14:38:01,685 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-04 14:38:01,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:01,686 INFO L225 Difference]: With dead ends: 36 [2018-10-04 14:38:01,686 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 14:38:01,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.5s impTime 9 [2018-10-04 14:38:01,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 14:38:01,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 14:38:01,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 14:38:01,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-04 14:38:01,695 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 22 [2018-10-04 14:38:01,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:01,696 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-04 14:38:01,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 14:38:01,696 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-04 14:38:01,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 14:38:01,697 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:01,697 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-10-04 14:38:01,697 INFO L423 AbstractCegarLoop]: === Iteration 27 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:01,697 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:01,697 INFO L82 PathProgramCache]: Analyzing trace with hash -856832915, now seen corresponding path program 24 times [2018-10-04 14:38:01,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:01,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:01,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:01,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:01,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:01,824 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:01,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:01,824 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:38:01,834 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:38:01,847 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-04 14:38:01,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:01,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:01,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:01,920 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 14:38:01,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 14:38:01,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 14:38:01,920 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:01,921 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2018-10-04 14:38:01,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:01,961 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-10-04 14:38:01,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 14:38:01,961 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-04 14:38:01,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:01,962 INFO L225 Difference]: With dead ends: 27 [2018-10-04 14:38:01,962 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 14:38:01,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 10 [2018-10-04 14:38:01,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 14:38:01,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-04 14:38:01,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 14:38:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-10-04 14:38:01,966 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2018-10-04 14:38:01,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:01,967 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-10-04 14:38:01,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 14:38:01,967 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-10-04 14:38:01,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 14:38:01,967 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:01,968 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1] [2018-10-04 14:38:01,968 INFO L423 AbstractCegarLoop]: === Iteration 28 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:01,968 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:01,968 INFO L82 PathProgramCache]: Analyzing trace with hash -792078111, now seen corresponding path program 25 times [2018-10-04 14:38:01,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:01,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:01,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:01,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:01,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:01,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:02,327 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:02,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:02,327 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 [2018-10-04 14:38:02,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:02,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:02,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:02,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 14:38:02,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 14:38:02,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 14:38:02,448 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:02,448 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2018-10-04 14:38:02,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:02,634 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-04 14:38:02,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 14:38:02,635 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-10-04 14:38:02,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:02,636 INFO L225 Difference]: With dead ends: 38 [2018-10-04 14:38:02,636 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 14:38:02,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 10 [2018-10-04 14:38:02,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 14:38:02,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-04 14:38:02,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 14:38:02,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-10-04 14:38:02,640 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2018-10-04 14:38:02,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:02,640 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-10-04 14:38:02,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 14:38:02,640 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-10-04 14:38:02,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 14:38:02,641 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:02,641 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-10-04 14:38:02,641 INFO L423 AbstractCegarLoop]: === Iteration 29 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:02,642 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:02,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1215320813, now seen corresponding path program 26 times [2018-10-04 14:38:02,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:02,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:02,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:02,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:02,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:02,777 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:02,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:02,777 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 [2018-10-04 14:38:02,784 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:38:02,814 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:38:02,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:02,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:02,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:02,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 14:38:02,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 14:38:02,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 14:38:02,912 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:02,912 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 13 states. [2018-10-04 14:38:02,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:02,968 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-10-04 14:38:02,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 14:38:02,968 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-04 14:38:02,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:02,969 INFO L225 Difference]: With dead ends: 39 [2018-10-04 14:38:02,969 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 14:38:02,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 10 [2018-10-04 14:38:02,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 14:38:02,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 14:38:02,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 14:38:02,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-04 14:38:02,974 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 24 [2018-10-04 14:38:02,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:02,974 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-04 14:38:02,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 14:38:02,974 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-04 14:38:02,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 14:38:02,975 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:02,975 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-10-04 14:38:02,975 INFO L423 AbstractCegarLoop]: === Iteration 30 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:02,975 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:02,975 INFO L82 PathProgramCache]: Analyzing trace with hash -2118190073, now seen corresponding path program 27 times [2018-10-04 14:38:02,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:02,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:02,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:02,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:02,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:03,152 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:03,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:38:03,163 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:38:03,179 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 14:38:03,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:03,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:03,326 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:03,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 14:38:03,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 14:38:03,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 14:38:03,327 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:03,327 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 13 states. [2018-10-04 14:38:03,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:03,415 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-10-04 14:38:03,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 14:38:03,415 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-04 14:38:03,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:03,416 INFO L225 Difference]: With dead ends: 29 [2018-10-04 14:38:03,416 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 14:38:03,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 11 [2018-10-04 14:38:03,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 14:38:03,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 14:38:03,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 14:38:03,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-10-04 14:38:03,420 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2018-10-04 14:38:03,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:03,420 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-10-04 14:38:03,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 14:38:03,421 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-10-04 14:38:03,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-04 14:38:03,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:03,421 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2018-10-04 14:38:03,422 INFO L423 AbstractCegarLoop]: === Iteration 31 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:03,422 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:03,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1239444345, now seen corresponding path program 28 times [2018-10-04 14:38:03,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:03,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:03,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:03,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:03,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:04,213 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:04,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:04,214 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:38:04,222 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:38:04,236 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:38:04,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:04,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:04,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:04,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 14:38:04,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 14:38:04,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 14:38:04,322 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:04,322 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2018-10-04 14:38:04,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:04,559 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-10-04 14:38:04,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 14:38:04,560 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-10-04 14:38:04,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:04,561 INFO L225 Difference]: With dead ends: 41 [2018-10-04 14:38:04,561 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 14:38:04,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 11 [2018-10-04 14:38:04,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 14:38:04,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2018-10-04 14:38:04,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 14:38:04,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-04 14:38:04,566 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2018-10-04 14:38:04,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:04,566 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-04 14:38:04,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 14:38:04,567 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-04 14:38:04,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 14:38:04,567 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:04,567 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-10-04 14:38:04,567 INFO L423 AbstractCegarLoop]: === Iteration 32 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:04,568 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:04,568 INFO L82 PathProgramCache]: Analyzing trace with hash 231869447, now seen corresponding path program 29 times [2018-10-04 14:38:04,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:04,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:04,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:04,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:04,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:04,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:04,830 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 [2018-10-04 14:38:04,841 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:38:04,863 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 14:38:04,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:04,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:04,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:04,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 14:38:04,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 14:38:04,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 14:38:04,967 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:04,967 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-10-04 14:38:05,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:05,044 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-10-04 14:38:05,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 14:38:05,045 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-04 14:38:05,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:05,046 INFO L225 Difference]: With dead ends: 42 [2018-10-04 14:38:05,046 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 14:38:05,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 11 [2018-10-04 14:38:05,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 14:38:05,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 14:38:05,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 14:38:05,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-04 14:38:05,051 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 26 [2018-10-04 14:38:05,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:05,052 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-04 14:38:05,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 14:38:05,052 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-04 14:38:05,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 14:38:05,052 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:05,053 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-10-04 14:38:05,053 INFO L423 AbstractCegarLoop]: === Iteration 33 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:05,053 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:05,053 INFO L82 PathProgramCache]: Analyzing trace with hash -27752915, now seen corresponding path program 30 times [2018-10-04 14:38:05,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:05,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:05,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:05,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:05,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:05,239 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:05,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:05,240 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 [2018-10-04 14:38:05,247 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:38:05,269 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 14:38:05,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:05,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:05,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:05,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 14:38:05,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 14:38:05,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 14:38:05,571 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:05,572 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2018-10-04 14:38:05,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:05,613 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-10-04 14:38:05,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 14:38:05,613 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-04 14:38:05,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:05,614 INFO L225 Difference]: With dead ends: 31 [2018-10-04 14:38:05,614 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 14:38:05,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.0s impTime 12 [2018-10-04 14:38:05,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 14:38:05,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 14:38:05,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 14:38:05,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-10-04 14:38:05,618 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 26 [2018-10-04 14:38:05,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:05,618 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-10-04 14:38:05,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 14:38:05,619 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-10-04 14:38:05,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 14:38:05,619 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:05,619 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1] [2018-10-04 14:38:05,619 INFO L423 AbstractCegarLoop]: === Iteration 34 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:05,619 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:05,619 INFO L82 PathProgramCache]: Analyzing trace with hash -860401887, now seen corresponding path program 31 times [2018-10-04 14:38:05,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:05,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:05,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:05,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:05,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:06,028 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:06,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:06,029 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 [2018-10-04 14:38:06,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:06,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:06,142 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:06,142 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 14:38:06,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 14:38:06,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 14:38:06,143 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:06,143 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2018-10-04 14:38:06,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:06,410 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-10-04 14:38:06,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 14:38:06,411 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-10-04 14:38:06,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:06,412 INFO L225 Difference]: With dead ends: 44 [2018-10-04 14:38:06,412 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 14:38:06,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 12 [2018-10-04 14:38:06,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 14:38:06,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-04 14:38:06,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 14:38:06,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-10-04 14:38:06,415 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2018-10-04 14:38:06,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:06,416 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-10-04 14:38:06,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 14:38:06,416 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-10-04 14:38:06,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 14:38:06,416 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:06,416 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-10-04 14:38:06,417 INFO L423 AbstractCegarLoop]: === Iteration 35 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:06,417 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:06,417 INFO L82 PathProgramCache]: Analyzing trace with hash -902716243, now seen corresponding path program 32 times [2018-10-04 14:38:06,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:06,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:06,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:06,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:06,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:06,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:06,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:06,736 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 [2018-10-04 14:38:06,750 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:38:06,766 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:38:06,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:06,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:06,836 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:06,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 14:38:06,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 14:38:06,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 14:38:06,837 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:06,837 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 15 states. [2018-10-04 14:38:06,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:06,915 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2018-10-04 14:38:06,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 14:38:06,915 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-04 14:38:06,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:06,916 INFO L225 Difference]: With dead ends: 45 [2018-10-04 14:38:06,916 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 14:38:06,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 12 [2018-10-04 14:38:06,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 14:38:06,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 14:38:06,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 14:38:06,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-04 14:38:06,921 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 28 [2018-10-04 14:38:06,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:06,921 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-04 14:38:06,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 14:38:06,921 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-04 14:38:06,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 14:38:06,922 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:06,922 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-10-04 14:38:06,922 INFO L423 AbstractCegarLoop]: === Iteration 36 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:06,922 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:06,922 INFO L82 PathProgramCache]: Analyzing trace with hash -361074873, now seen corresponding path program 33 times [2018-10-04 14:38:06,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:06,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:06,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:06,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:06,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:07,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:07,089 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 [2018-10-04 14:38:07,096 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:38:07,137 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-04 14:38:07,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:07,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:07,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:07,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 14:38:07,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 14:38:07,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 14:38:07,224 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:07,224 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 15 states. [2018-10-04 14:38:07,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:07,526 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-10-04 14:38:07,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 14:38:07,527 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-04 14:38:07,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:07,527 INFO L225 Difference]: With dead ends: 33 [2018-10-04 14:38:07,527 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 14:38:07,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 13 [2018-10-04 14:38:07,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 14:38:07,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-04 14:38:07,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 14:38:07,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-10-04 14:38:07,530 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2018-10-04 14:38:07,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:07,530 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-10-04 14:38:07,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 14:38:07,531 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-10-04 14:38:07,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 14:38:07,531 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:07,531 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1] [2018-10-04 14:38:07,531 INFO L423 AbstractCegarLoop]: === Iteration 37 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:07,532 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:07,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1691519303, now seen corresponding path program 34 times [2018-10-04 14:38:07,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:07,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:07,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:07,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:07,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:07,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:07,799 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 [2018-10-04 14:38:07,806 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:38:07,822 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:38:07,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:07,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:07,891 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:07,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:07,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 14:38:07,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 14:38:07,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 14:38:07,913 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:07,913 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2018-10-04 14:38:08,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:08,174 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2018-10-04 14:38:08,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 14:38:08,175 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2018-10-04 14:38:08,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:08,175 INFO L225 Difference]: With dead ends: 47 [2018-10-04 14:38:08,175 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 14:38:08,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 13 [2018-10-04 14:38:08,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 14:38:08,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2018-10-04 14:38:08,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 14:38:08,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-10-04 14:38:08,180 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-10-04 14:38:08,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:08,180 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-10-04 14:38:08,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 14:38:08,180 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-10-04 14:38:08,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 14:38:08,180 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:08,180 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-10-04 14:38:08,181 INFO L423 AbstractCegarLoop]: === Iteration 38 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:08,181 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:08,181 INFO L82 PathProgramCache]: Analyzing trace with hash 897429319, now seen corresponding path program 35 times [2018-10-04 14:38:08,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:08,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:08,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:08,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:08,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:08,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:08,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:08,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:38:08,399 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:38:08,418 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 14:38:08,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:08,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:08,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:08,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 14:38:08,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 14:38:08,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 14:38:08,539 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:08,539 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 16 states. [2018-10-04 14:38:08,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:08,642 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-10-04 14:38:08,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 14:38:08,643 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-04 14:38:08,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:08,643 INFO L225 Difference]: With dead ends: 48 [2018-10-04 14:38:08,643 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 14:38:08,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 13 [2018-10-04 14:38:08,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 14:38:08,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 14:38:08,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 14:38:08,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-04 14:38:08,647 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 30 [2018-10-04 14:38:08,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:08,647 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-04 14:38:08,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 14:38:08,647 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-04 14:38:08,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 14:38:08,648 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:08,648 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-10-04 14:38:08,648 INFO L423 AbstractCegarLoop]: === Iteration 39 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:08,648 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:08,648 INFO L82 PathProgramCache]: Analyzing trace with hash 508442605, now seen corresponding path program 36 times [2018-10-04 14:38:08,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:08,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:08,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:08,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:08,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:08,801 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:08,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:08,801 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 [2018-10-04 14:38:08,809 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:38:08,830 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 14:38:08,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:08,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:08,932 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:08,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 14:38:08,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 14:38:08,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 14:38:08,934 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:08,934 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2018-10-04 14:38:09,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:09,010 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-10-04 14:38:09,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 14:38:09,010 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-04 14:38:09,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:09,011 INFO L225 Difference]: With dead ends: 35 [2018-10-04 14:38:09,011 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 14:38:09,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 14 [2018-10-04 14:38:09,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 14:38:09,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 14:38:09,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 14:38:09,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-10-04 14:38:09,015 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 30 [2018-10-04 14:38:09,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:09,015 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-10-04 14:38:09,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 14:38:09,015 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-10-04 14:38:09,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-04 14:38:09,016 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:09,016 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1] [2018-10-04 14:38:09,016 INFO L423 AbstractCegarLoop]: === Iteration 40 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:09,016 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:09,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1418209951, now seen corresponding path program 37 times [2018-10-04 14:38:09,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:09,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:09,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:09,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:09,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:09,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:09,401 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 [2018-10-04 14:38:09,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:09,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:09,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:09,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 14:38:09,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 14:38:09,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 14:38:09,556 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:09,556 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2018-10-04 14:38:09,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:09,829 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-10-04 14:38:09,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 14:38:09,829 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2018-10-04 14:38:09,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:09,830 INFO L225 Difference]: With dead ends: 50 [2018-10-04 14:38:09,830 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 14:38:09,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 14 [2018-10-04 14:38:09,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 14:38:09,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-04 14:38:09,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 14:38:09,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-10-04 14:38:09,834 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2018-10-04 14:38:09,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:09,834 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-10-04 14:38:09,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 14:38:09,835 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-10-04 14:38:09,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 14:38:09,835 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:09,835 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-10-04 14:38:09,835 INFO L423 AbstractCegarLoop]: === Iteration 41 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:09,836 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:09,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1014897043, now seen corresponding path program 38 times [2018-10-04 14:38:09,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:09,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:09,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:09,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:09,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:10,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:10,146 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 [2018-10-04 14:38:10,155 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:38:10,172 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:38:10,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:10,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:10,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:10,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 14:38:10,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 14:38:10,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 14:38:10,281 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:10,281 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 17 states. [2018-10-04 14:38:10,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:10,367 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-10-04 14:38:10,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 14:38:10,368 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-04 14:38:10,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:10,368 INFO L225 Difference]: With dead ends: 51 [2018-10-04 14:38:10,368 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 14:38:10,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 14 [2018-10-04 14:38:10,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 14:38:10,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 14:38:10,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 14:38:10,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-04 14:38:10,372 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 32 [2018-10-04 14:38:10,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:10,372 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-04 14:38:10,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 14:38:10,373 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-04 14:38:10,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 14:38:10,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:10,373 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-10-04 14:38:10,373 INFO L423 AbstractCegarLoop]: === Iteration 42 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:10,373 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:10,373 INFO L82 PathProgramCache]: Analyzing trace with hash -188583289, now seen corresponding path program 39 times [2018-10-04 14:38:10,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:10,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:10,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:10,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:10,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:10,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:10,580 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:38:10,587 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:38:10,607 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 14:38:10,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:10,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:10,668 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:10,688 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:10,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 14:38:10,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 14:38:10,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 14:38:10,689 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:10,689 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2018-10-04 14:38:10,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:10,751 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-04 14:38:10,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 14:38:10,751 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-04 14:38:10,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:10,752 INFO L225 Difference]: With dead ends: 37 [2018-10-04 14:38:10,752 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 14:38:10,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 15 [2018-10-04 14:38:10,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 14:38:10,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 14:38:10,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 14:38:10,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-10-04 14:38:10,756 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2018-10-04 14:38:10,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:10,756 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-10-04 14:38:10,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 14:38:10,757 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-10-04 14:38:10,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 14:38:10,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:10,757 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1] [2018-10-04 14:38:10,757 INFO L423 AbstractCegarLoop]: === Iteration 43 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:10,757 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:10,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1551176185, now seen corresponding path program 40 times [2018-10-04 14:38:10,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:10,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:10,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:10,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:10,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:11,075 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:11,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:11,075 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 [2018-10-04 14:38:11,084 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:38:11,105 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:38:11,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:11,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:11,309 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:11,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:11,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 14:38:11,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 14:38:11,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 14:38:11,330 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:11,330 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 17 states. [2018-10-04 14:38:11,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:11,655 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-10-04 14:38:11,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 14:38:11,655 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2018-10-04 14:38:11,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:11,656 INFO L225 Difference]: With dead ends: 53 [2018-10-04 14:38:11,656 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 14:38:11,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 15 [2018-10-04 14:38:11,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 14:38:11,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2018-10-04 14:38:11,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 14:38:11,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-10-04 14:38:11,661 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2018-10-04 14:38:11,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:11,661 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-10-04 14:38:11,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 14:38:11,661 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-10-04 14:38:11,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 14:38:11,662 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:11,662 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-10-04 14:38:11,662 INFO L423 AbstractCegarLoop]: === Iteration 44 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:11,662 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:11,662 INFO L82 PathProgramCache]: Analyzing trace with hash -841883001, now seen corresponding path program 41 times [2018-10-04 14:38:11,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:11,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:11,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:11,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:11,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:11,850 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:11,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:11,850 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 [2018-10-04 14:38:11,859 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:38:11,881 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 14:38:11,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:11,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:11,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:11,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 14:38:11,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 14:38:11,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 14:38:11,962 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:11,962 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 18 states. [2018-10-04 14:38:12,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:12,050 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2018-10-04 14:38:12,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 14:38:12,050 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-04 14:38:12,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:12,051 INFO L225 Difference]: With dead ends: 54 [2018-10-04 14:38:12,051 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 14:38:12,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 15 [2018-10-04 14:38:12,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 14:38:12,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 14:38:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 14:38:12,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-04 14:38:12,054 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 34 [2018-10-04 14:38:12,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:12,055 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-04 14:38:12,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 14:38:12,055 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-04 14:38:12,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 14:38:12,055 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:12,055 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-10-04 14:38:12,055 INFO L423 AbstractCegarLoop]: === Iteration 45 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:12,055 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:12,055 INFO L82 PathProgramCache]: Analyzing trace with hash -995960403, now seen corresponding path program 42 times [2018-10-04 14:38:12,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:12,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:12,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:12,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:12,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:12,255 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:12,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:12,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:38:12,263 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:38:12,290 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 14:38:12,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:12,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:12,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:12,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 14:38:12,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 14:38:12,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 14:38:12,381 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:12,381 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 18 states. [2018-10-04 14:38:12,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:12,432 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-10-04 14:38:12,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 14:38:12,432 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-04 14:38:12,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:12,433 INFO L225 Difference]: With dead ends: 39 [2018-10-04 14:38:12,433 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 14:38:12,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 16 [2018-10-04 14:38:12,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 14:38:12,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 14:38:12,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 14:38:12,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-10-04 14:38:12,436 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 34 [2018-10-04 14:38:12,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:12,437 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-10-04 14:38:12,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 14:38:12,437 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-10-04 14:38:12,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 14:38:12,437 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:12,437 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1] [2018-10-04 14:38:12,437 INFO L423 AbstractCegarLoop]: === Iteration 46 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:12,437 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:12,437 INFO L82 PathProgramCache]: Analyzing trace with hash -810062943, now seen corresponding path program 43 times [2018-10-04 14:38:12,438 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:12,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:12,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:12,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:12,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:12,815 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:12,815 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:12,815 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 [2018-10-04 14:38:12,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:12,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:12,936 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:12,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 14:38:12,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 14:38:12,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 14:38:12,937 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:12,937 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 18 states. [2018-10-04 14:38:13,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:13,313 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-10-04 14:38:13,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 14:38:13,314 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2018-10-04 14:38:13,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:13,314 INFO L225 Difference]: With dead ends: 56 [2018-10-04 14:38:13,314 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 14:38:13,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 16 [2018-10-04 14:38:13,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 14:38:13,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2018-10-04 14:38:13,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 14:38:13,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-10-04 14:38:13,318 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2018-10-04 14:38:13,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:13,318 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-10-04 14:38:13,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 14:38:13,319 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-10-04 14:38:13,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 14:38:13,319 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:13,319 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-10-04 14:38:13,319 INFO L423 AbstractCegarLoop]: === Iteration 47 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:13,319 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:13,320 INFO L82 PathProgramCache]: Analyzing trace with hash 657791021, now seen corresponding path program 44 times [2018-10-04 14:38:13,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:13,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:13,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:13,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:13,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:13,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:13,613 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 [2018-10-04 14:38:13,620 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:38:13,641 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:38:13,642 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:13,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:13,699 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:13,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:13,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 14:38:13,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 14:38:13,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 14:38:13,720 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:13,720 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 19 states. [2018-10-04 14:38:13,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:13,827 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-10-04 14:38:13,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 14:38:13,828 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-04 14:38:13,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:13,829 INFO L225 Difference]: With dead ends: 57 [2018-10-04 14:38:13,829 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 14:38:13,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 16 [2018-10-04 14:38:13,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 14:38:13,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 14:38:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 14:38:13,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-04 14:38:13,832 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 36 [2018-10-04 14:38:13,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:13,832 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-04 14:38:13,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 14:38:13,832 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-04 14:38:13,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 14:38:13,833 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:13,833 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-10-04 14:38:13,833 INFO L423 AbstractCegarLoop]: === Iteration 48 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:13,833 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:13,833 INFO L82 PathProgramCache]: Analyzing trace with hash 176358855, now seen corresponding path program 45 times [2018-10-04 14:38:13,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:13,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:13,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:13,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:13,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:13,987 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:13,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:38:13,994 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:38:14,018 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 14:38:14,018 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:14,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:14,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:14,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 14:38:14,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 14:38:14,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 14:38:14,140 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:14,140 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 19 states. [2018-10-04 14:38:14,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:14,217 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-10-04 14:38:14,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 14:38:14,217 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-04 14:38:14,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:14,218 INFO L225 Difference]: With dead ends: 41 [2018-10-04 14:38:14,218 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 14:38:14,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 17 [2018-10-04 14:38:14,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 14:38:14,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-04 14:38:14,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 14:38:14,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-10-04 14:38:14,221 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 36 [2018-10-04 14:38:14,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:14,221 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-10-04 14:38:14,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 14:38:14,222 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-10-04 14:38:14,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 14:38:14,222 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:14,222 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1] [2018-10-04 14:38:14,222 INFO L423 AbstractCegarLoop]: === Iteration 49 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:14,223 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:14,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1172095687, now seen corresponding path program 46 times [2018-10-04 14:38:14,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:14,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:14,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:14,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:14,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:14,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:14,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:38:14,584 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:38:14,606 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:38:14,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:14,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:14,709 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:14,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:14,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 14:38:14,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 14:38:14,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 14:38:14,729 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:14,729 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 19 states. [2018-10-04 14:38:15,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:15,351 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2018-10-04 14:38:15,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 14:38:15,352 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2018-10-04 14:38:15,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:15,352 INFO L225 Difference]: With dead ends: 59 [2018-10-04 14:38:15,352 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 14:38:15,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 17 [2018-10-04 14:38:15,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 14:38:15,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2018-10-04 14:38:15,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 14:38:15,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-10-04 14:38:15,356 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2018-10-04 14:38:15,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:15,356 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-10-04 14:38:15,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 14:38:15,356 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-10-04 14:38:15,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 14:38:15,357 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:15,357 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-10-04 14:38:15,357 INFO L423 AbstractCegarLoop]: === Iteration 50 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:15,357 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:15,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1975166407, now seen corresponding path program 47 times [2018-10-04 14:38:15,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:15,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:15,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:15,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:15,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:15,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:15,702 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:15,709 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:38:15,772 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 14:38:15,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:15,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:16,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:16,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 14:38:16,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 14:38:16,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 14:38:16,267 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:16,268 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 20 states. [2018-10-04 14:38:16,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:16,378 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-10-04 14:38:16,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 14:38:16,378 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-04 14:38:16,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:16,379 INFO L225 Difference]: With dead ends: 60 [2018-10-04 14:38:16,379 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 14:38:16,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.1s impTime 17 [2018-10-04 14:38:16,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 14:38:16,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 14:38:16,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 14:38:16,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-04 14:38:16,382 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 38 [2018-10-04 14:38:16,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:16,382 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-04 14:38:16,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 14:38:16,382 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-04 14:38:16,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 14:38:16,383 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:16,383 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-10-04 14:38:16,383 INFO L423 AbstractCegarLoop]: === Iteration 51 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:16,383 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:16,383 INFO L82 PathProgramCache]: Analyzing trace with hash -64328851, now seen corresponding path program 48 times [2018-10-04 14:38:16,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:16,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:16,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:16,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:16,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:16,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:16,596 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:16,605 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:38:16,630 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-04 14:38:16,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:16,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:16,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:16,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 14:38:16,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 14:38:16,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 14:38:16,730 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:16,730 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 20 states. [2018-10-04 14:38:16,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:16,784 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-10-04 14:38:16,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 14:38:16,784 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-04 14:38:16,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:16,785 INFO L225 Difference]: With dead ends: 43 [2018-10-04 14:38:16,785 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 14:38:16,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 18 [2018-10-04 14:38:16,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 14:38:16,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 14:38:16,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 14:38:16,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-10-04 14:38:16,789 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2018-10-04 14:38:16,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:16,789 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-10-04 14:38:16,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 14:38:16,790 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-10-04 14:38:16,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-04 14:38:16,790 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:16,790 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1] [2018-10-04 14:38:16,790 INFO L423 AbstractCegarLoop]: === Iteration 52 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:16,791 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:16,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1994255903, now seen corresponding path program 49 times [2018-10-04 14:38:16,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:16,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:16,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:16,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:16,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:17,232 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:17,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:17,233 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:17,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:17,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:17,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:17,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 14:38:17,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 14:38:17,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 14:38:17,403 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:17,403 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 20 states. [2018-10-04 14:38:17,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:17,857 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-10-04 14:38:17,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 14:38:17,858 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2018-10-04 14:38:17,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:17,859 INFO L225 Difference]: With dead ends: 62 [2018-10-04 14:38:17,859 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 14:38:17,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 18 [2018-10-04 14:38:17,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 14:38:17,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2018-10-04 14:38:17,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 14:38:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-10-04 14:38:17,863 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2018-10-04 14:38:17,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:17,863 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-10-04 14:38:17,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 14:38:17,863 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-10-04 14:38:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 14:38:17,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:17,864 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-10-04 14:38:17,864 INFO L423 AbstractCegarLoop]: === Iteration 53 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:17,864 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:17,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1692452371, now seen corresponding path program 50 times [2018-10-04 14:38:17,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:17,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:17,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:17,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:17,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:18,095 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:18,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:18,096 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:18,106 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:38:18,131 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:38:18,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:18,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:18,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:18,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 14:38:18,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 14:38:18,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 14:38:18,308 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:18,308 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 21 states. [2018-10-04 14:38:18,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:18,437 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2018-10-04 14:38:18,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 14:38:18,438 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-04 14:38:18,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:18,439 INFO L225 Difference]: With dead ends: 63 [2018-10-04 14:38:18,439 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 14:38:18,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 18 [2018-10-04 14:38:18,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 14:38:18,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 14:38:18,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 14:38:18,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-10-04 14:38:18,442 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 40 [2018-10-04 14:38:18,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:18,442 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-10-04 14:38:18,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 14:38:18,442 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-10-04 14:38:18,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 14:38:18,443 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:18,443 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-10-04 14:38:18,443 INFO L423 AbstractCegarLoop]: === Iteration 54 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:18,443 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:18,443 INFO L82 PathProgramCache]: Analyzing trace with hash -492295929, now seen corresponding path program 51 times [2018-10-04 14:38:18,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:18,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:18,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:18,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:18,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:18,888 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:18,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:18,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:18,896 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:38:18,928 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-04 14:38:18,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:18,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:19,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:19,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 14:38:19,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 14:38:19,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 14:38:19,040 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:19,040 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 21 states. [2018-10-04 14:38:19,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:19,110 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-10-04 14:38:19,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 14:38:19,110 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-04 14:38:19,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:19,111 INFO L225 Difference]: With dead ends: 45 [2018-10-04 14:38:19,111 INFO L226 Difference]: Without dead ends: 42 [2018-10-04 14:38:19,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 19 [2018-10-04 14:38:19,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-04 14:38:19,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-04 14:38:19,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 14:38:19,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-10-04 14:38:19,116 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2018-10-04 14:38:19,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:19,116 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-10-04 14:38:19,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 14:38:19,116 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-10-04 14:38:19,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 14:38:19,116 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:19,117 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1] [2018-10-04 14:38:19,117 INFO L423 AbstractCegarLoop]: === Iteration 55 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:19,117 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:19,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1918633863, now seen corresponding path program 52 times [2018-10-04 14:38:19,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:19,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:19,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:19,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:19,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:19,745 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:19,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:19,745 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:19,754 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:38:19,779 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:38:19,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:19,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:19,887 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:19,907 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:19,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 14:38:19,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 14:38:19,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 14:38:19,907 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:19,907 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 21 states. [2018-10-04 14:38:20,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:20,384 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-10-04 14:38:20,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 14:38:20,384 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2018-10-04 14:38:20,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:20,385 INFO L225 Difference]: With dead ends: 65 [2018-10-04 14:38:20,385 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 14:38:20,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 19 [2018-10-04 14:38:20,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 14:38:20,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2018-10-04 14:38:20,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 14:38:20,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2018-10-04 14:38:20,389 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2018-10-04 14:38:20,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:20,389 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2018-10-04 14:38:20,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 14:38:20,389 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2018-10-04 14:38:20,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 14:38:20,390 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:20,390 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-10-04 14:38:20,390 INFO L423 AbstractCegarLoop]: === Iteration 56 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:20,390 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:20,390 INFO L82 PathProgramCache]: Analyzing trace with hash -651953913, now seen corresponding path program 53 times [2018-10-04 14:38:20,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:20,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:20,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:20,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:20,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:20,827 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:20,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:20,828 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:20,835 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:38:20,862 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-10-04 14:38:20,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:20,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:20,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:20,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 14:38:20,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 14:38:20,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 14:38:20,949 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:20,949 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 22 states. [2018-10-04 14:38:21,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:21,092 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2018-10-04 14:38:21,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 14:38:21,092 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-04 14:38:21,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:21,093 INFO L225 Difference]: With dead ends: 66 [2018-10-04 14:38:21,093 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 14:38:21,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 19 [2018-10-04 14:38:21,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 14:38:21,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 14:38:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 14:38:21,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-04 14:38:21,096 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 42 [2018-10-04 14:38:21,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:21,097 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-04 14:38:21,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 14:38:21,097 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-04 14:38:21,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 14:38:21,097 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:21,097 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-10-04 14:38:21,097 INFO L423 AbstractCegarLoop]: === Iteration 57 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:21,097 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:21,098 INFO L82 PathProgramCache]: Analyzing trace with hash -2101809875, now seen corresponding path program 54 times [2018-10-04 14:38:21,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:21,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:21,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:21,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:21,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:21,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:22,543 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:22,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:22,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:22,551 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:38:22,580 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-04 14:38:22,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:22,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:22,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:22,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 14:38:22,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 14:38:22,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 14:38:22,814 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:22,814 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2018-10-04 14:38:22,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:22,880 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2018-10-04 14:38:22,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 14:38:22,881 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-04 14:38:22,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:22,882 INFO L225 Difference]: With dead ends: 47 [2018-10-04 14:38:22,883 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 14:38:22,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.0s impTime 20 [2018-10-04 14:38:22,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 14:38:22,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-04 14:38:22,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 14:38:22,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-10-04 14:38:22,886 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 42 [2018-10-04 14:38:22,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:22,886 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-10-04 14:38:22,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 14:38:22,887 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-10-04 14:38:22,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 14:38:22,887 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:22,887 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1] [2018-10-04 14:38:22,887 INFO L423 AbstractCegarLoop]: === Iteration 58 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:22,887 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:22,887 INFO L82 PathProgramCache]: Analyzing trace with hash -731658207, now seen corresponding path program 55 times [2018-10-04 14:38:22,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:22,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:22,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:22,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:22,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:23,270 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:23,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:23,271 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:23,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:23,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:23,387 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:23,406 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:23,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 14:38:23,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 14:38:23,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 14:38:23,407 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:23,407 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 22 states. [2018-10-04 14:38:23,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:23,934 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-10-04 14:38:23,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 14:38:23,935 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2018-10-04 14:38:23,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:23,936 INFO L225 Difference]: With dead ends: 68 [2018-10-04 14:38:23,936 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 14:38:23,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 20 [2018-10-04 14:38:23,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 14:38:23,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2018-10-04 14:38:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 14:38:23,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-10-04 14:38:23,940 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2018-10-04 14:38:23,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:23,940 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-10-04 14:38:23,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 14:38:23,940 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-10-04 14:38:23,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 14:38:23,941 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:23,941 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-10-04 14:38:23,941 INFO L423 AbstractCegarLoop]: === Iteration 59 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:23,941 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:23,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1206629459, now seen corresponding path program 56 times [2018-10-04 14:38:23,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:23,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:23,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:23,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:23,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:24,520 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:24,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:24,521 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:24,529 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:38:24,559 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:38:24,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:24,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:24,732 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:24,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 14:38:24,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 14:38:24,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 14:38:24,733 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:24,733 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 23 states. [2018-10-04 14:38:24,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:24,876 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2018-10-04 14:38:24,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 14:38:24,877 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-04 14:38:24,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:24,878 INFO L225 Difference]: With dead ends: 69 [2018-10-04 14:38:24,878 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 14:38:24,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 20 [2018-10-04 14:38:24,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 14:38:24,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 14:38:24,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 14:38:24,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-04 14:38:24,883 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 44 [2018-10-04 14:38:24,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:24,883 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-04 14:38:24,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 14:38:24,883 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-04 14:38:24,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 14:38:24,883 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:24,884 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-10-04 14:38:24,884 INFO L423 AbstractCegarLoop]: === Iteration 60 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:24,884 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:24,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1092475975, now seen corresponding path program 57 times [2018-10-04 14:38:24,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:24,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:24,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:24,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:24,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:25,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:25,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:25,130 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:38:25,163 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-04 14:38:25,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:25,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:25,257 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:25,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:25,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 14:38:25,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 14:38:25,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 14:38:25,279 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:25,279 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 23 states. [2018-10-04 14:38:25,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:25,353 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-04 14:38:25,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 14:38:25,354 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-04 14:38:25,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:25,354 INFO L225 Difference]: With dead ends: 49 [2018-10-04 14:38:25,354 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 14:38:25,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 21 [2018-10-04 14:38:25,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 14:38:25,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 14:38:25,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 14:38:25,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-10-04 14:38:25,358 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2018-10-04 14:38:25,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:25,359 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-10-04 14:38:25,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 14:38:25,359 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-10-04 14:38:25,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-04 14:38:25,359 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:25,359 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1] [2018-10-04 14:38:25,359 INFO L423 AbstractCegarLoop]: === Iteration 61 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:25,359 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:25,359 INFO L82 PathProgramCache]: Analyzing trace with hash -493044665, now seen corresponding path program 58 times [2018-10-04 14:38:25,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:25,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:25,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:25,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:25,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:25,862 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:25,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:25,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:25,871 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:38:25,896 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:38:25,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:25,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:25,998 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:25,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 14:38:25,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 14:38:25,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 14:38:25,999 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:25,999 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 23 states. [2018-10-04 14:38:26,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:26,578 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2018-10-04 14:38:26,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 14:38:26,579 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2018-10-04 14:38:26,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:26,580 INFO L225 Difference]: With dead ends: 71 [2018-10-04 14:38:26,580 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 14:38:26,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 21 [2018-10-04 14:38:26,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 14:38:26,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2018-10-04 14:38:26,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 14:38:26,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2018-10-04 14:38:26,584 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2018-10-04 14:38:26,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:26,584 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2018-10-04 14:38:26,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 14:38:26,584 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2018-10-04 14:38:26,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 14:38:26,585 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:26,585 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-10-04 14:38:26,585 INFO L423 AbstractCegarLoop]: === Iteration 62 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:26,585 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:26,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1895423047, now seen corresponding path program 59 times [2018-10-04 14:38:26,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:26,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:26,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:26,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:26,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:26,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:26,917 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:26,925 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:38:26,969 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 14:38:26,969 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:26,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:27,168 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:27,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 14:38:27,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 14:38:27,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 14:38:27,168 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:27,169 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2018-10-04 14:38:27,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:27,308 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2018-10-04 14:38:27,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 14:38:27,308 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-04 14:38:27,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:27,309 INFO L225 Difference]: With dead ends: 72 [2018-10-04 14:38:27,309 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 14:38:27,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 21 [2018-10-04 14:38:27,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 14:38:27,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 14:38:27,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 14:38:27,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-10-04 14:38:27,314 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 46 [2018-10-04 14:38:27,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:27,314 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-10-04 14:38:27,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 14:38:27,315 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-10-04 14:38:27,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 14:38:27,315 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:27,315 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-10-04 14:38:27,315 INFO L423 AbstractCegarLoop]: === Iteration 63 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:27,316 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:27,316 INFO L82 PathProgramCache]: Analyzing trace with hash 153247469, now seen corresponding path program 60 times [2018-10-04 14:38:27,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:27,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:27,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:27,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:27,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:27,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:27,581 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:27,589 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:38:27,757 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-04 14:38:27,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:27,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:28,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:28,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 14:38:28,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 14:38:28,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 14:38:28,129 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:28,129 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2018-10-04 14:38:28,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:28,201 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-10-04 14:38:28,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 14:38:28,201 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-04 14:38:28,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:28,202 INFO L225 Difference]: With dead ends: 51 [2018-10-04 14:38:28,202 INFO L226 Difference]: Without dead ends: 48 [2018-10-04 14:38:28,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.1s impTime 22 [2018-10-04 14:38:28,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-04 14:38:28,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-04 14:38:28,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 14:38:28,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-10-04 14:38:28,207 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 46 [2018-10-04 14:38:28,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:28,207 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-10-04 14:38:28,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 14:38:28,207 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-10-04 14:38:28,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 14:38:28,207 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:28,207 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1] [2018-10-04 14:38:28,208 INFO L423 AbstractCegarLoop]: === Iteration 64 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:28,208 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:28,208 INFO L82 PathProgramCache]: Analyzing trace with hash 455642721, now seen corresponding path program 61 times [2018-10-04 14:38:28,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:28,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:28,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:28,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:28,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:28,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:28,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:28,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:28,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:28,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:28,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 14:38:28,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 14:38:28,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 14:38:28,815 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:28,816 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 24 states. [2018-10-04 14:38:29,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:29,495 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-10-04 14:38:29,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 14:38:29,495 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2018-10-04 14:38:29,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:29,496 INFO L225 Difference]: With dead ends: 74 [2018-10-04 14:38:29,496 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 14:38:29,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 22 [2018-10-04 14:38:29,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 14:38:29,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2018-10-04 14:38:29,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 14:38:29,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-10-04 14:38:29,500 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-10-04 14:38:29,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:29,500 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-10-04 14:38:29,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 14:38:29,500 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-10-04 14:38:29,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 14:38:29,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:29,500 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-10-04 14:38:29,501 INFO L423 AbstractCegarLoop]: === Iteration 65 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:29,501 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:29,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1239960941, now seen corresponding path program 62 times [2018-10-04 14:38:29,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:29,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:29,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:29,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:29,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:30,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:30,069 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:30,077 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:38:30,101 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:38:30,102 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:30,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:30,173 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:30,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:30,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 14:38:30,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 14:38:30,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 14:38:30,193 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:30,193 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 25 states. [2018-10-04 14:38:30,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:30,371 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2018-10-04 14:38:30,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 14:38:30,371 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-04 14:38:30,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:30,372 INFO L225 Difference]: With dead ends: 75 [2018-10-04 14:38:30,372 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 14:38:30,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 22 [2018-10-04 14:38:30,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 14:38:30,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 14:38:30,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 14:38:30,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-04 14:38:30,377 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 48 [2018-10-04 14:38:30,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:30,378 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-04 14:38:30,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 14:38:30,378 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-04 14:38:30,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 14:38:30,378 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:30,379 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-10-04 14:38:30,379 INFO L423 AbstractCegarLoop]: === Iteration 66 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:30,379 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:30,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1227874425, now seen corresponding path program 63 times [2018-10-04 14:38:30,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:30,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:30,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:30,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:30,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:31,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:31,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:31,266 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:38:31,299 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 14:38:31,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:31,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:31,412 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:31,431 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:31,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 14:38:31,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 14:38:31,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 14:38:31,432 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:31,432 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 25 states. [2018-10-04 14:38:31,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:31,506 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-10-04 14:38:31,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 14:38:31,507 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-04 14:38:31,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:31,508 INFO L225 Difference]: With dead ends: 53 [2018-10-04 14:38:31,508 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 14:38:31,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 23 [2018-10-04 14:38:31,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 14:38:31,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 14:38:31,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 14:38:31,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-10-04 14:38:31,512 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 48 [2018-10-04 14:38:31,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:31,512 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-10-04 14:38:31,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 14:38:31,512 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-10-04 14:38:31,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-04 14:38:31,512 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:31,513 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1] [2018-10-04 14:38:31,513 INFO L423 AbstractCegarLoop]: === Iteration 67 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:31,513 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:31,513 INFO L82 PathProgramCache]: Analyzing trace with hash 590536967, now seen corresponding path program 64 times [2018-10-04 14:38:31,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:31,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:31,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:31,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:31,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:31,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:31,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:31,948 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:38:31,975 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:38:31,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:31,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:32,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:32,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 14:38:32,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 14:38:32,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 14:38:32,111 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:32,111 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 25 states. [2018-10-04 14:38:32,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:32,837 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-10-04 14:38:32,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 14:38:32,838 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2018-10-04 14:38:32,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:32,839 INFO L225 Difference]: With dead ends: 77 [2018-10-04 14:38:32,839 INFO L226 Difference]: Without dead ends: 74 [2018-10-04 14:38:32,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 23 [2018-10-04 14:38:32,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-04 14:38:32,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2018-10-04 14:38:32,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 14:38:32,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-10-04 14:38:32,843 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2018-10-04 14:38:32,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:32,843 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-10-04 14:38:32,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 14:38:32,843 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-10-04 14:38:32,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 14:38:32,843 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:32,843 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-10-04 14:38:32,844 INFO L423 AbstractCegarLoop]: === Iteration 68 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:32,844 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:32,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1126715271, now seen corresponding path program 65 times [2018-10-04 14:38:32,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:32,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:32,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:32,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:32,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:33,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:33,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:33,792 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:38:33,826 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 14:38:33,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:33,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:33,907 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:33,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:33,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 14:38:33,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 14:38:33,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 14:38:33,927 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:33,927 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-10-04 14:38:34,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:34,098 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2018-10-04 14:38:34,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 14:38:34,099 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-04 14:38:34,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:34,099 INFO L225 Difference]: With dead ends: 78 [2018-10-04 14:38:34,100 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 14:38:34,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 23 [2018-10-04 14:38:34,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 14:38:34,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 14:38:34,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 14:38:34,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-04 14:38:34,104 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 50 [2018-10-04 14:38:34,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:34,104 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-04 14:38:34,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 14:38:34,104 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-04 14:38:34,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 14:38:34,104 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:34,104 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-10-04 14:38:34,104 INFO L423 AbstractCegarLoop]: === Iteration 69 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:34,105 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:34,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1933230253, now seen corresponding path program 66 times [2018-10-04 14:38:34,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:34,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:34,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:34,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:34,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:34,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:34,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:34,342 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:38:34,374 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 14:38:34,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:34,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:34,462 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:34,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:34,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 14:38:34,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 14:38:34,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 14:38:34,482 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:34,483 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 26 states. [2018-10-04 14:38:34,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:34,664 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-10-04 14:38:34,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 14:38:34,664 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-04 14:38:34,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:34,665 INFO L225 Difference]: With dead ends: 55 [2018-10-04 14:38:34,665 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 14:38:34,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 24 [2018-10-04 14:38:34,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 14:38:34,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 14:38:34,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 14:38:34,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-10-04 14:38:34,670 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 50 [2018-10-04 14:38:34,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:34,670 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-10-04 14:38:34,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 14:38:34,671 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-10-04 14:38:34,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 14:38:34,671 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:34,671 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1] [2018-10-04 14:38:34,671 INFO L423 AbstractCegarLoop]: === Iteration 70 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:34,671 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:34,671 INFO L82 PathProgramCache]: Analyzing trace with hash -199465823, now seen corresponding path program 67 times [2018-10-04 14:38:34,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:34,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:34,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:34,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:34,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:35,369 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:35,369 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:35,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:35,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:35,508 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:35,527 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:35,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 14:38:35,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 14:38:35,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 14:38:35,528 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:35,528 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 26 states. [2018-10-04 14:38:36,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:36,272 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-10-04 14:38:36,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 14:38:36,273 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-10-04 14:38:36,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:36,274 INFO L225 Difference]: With dead ends: 80 [2018-10-04 14:38:36,274 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 14:38:36,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 24 [2018-10-04 14:38:36,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 14:38:36,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2018-10-04 14:38:36,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 14:38:36,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2018-10-04 14:38:36,278 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2018-10-04 14:38:36,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:36,278 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2018-10-04 14:38:36,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 14:38:36,278 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2018-10-04 14:38:36,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 14:38:36,278 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:36,278 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-10-04 14:38:36,278 INFO L423 AbstractCegarLoop]: === Iteration 71 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:36,279 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:36,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1888534739, now seen corresponding path program 68 times [2018-10-04 14:38:36,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:36,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:36,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:36,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:36,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:36,717 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:36,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:36,717 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:36,724 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:38:36,753 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:38:36,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:36,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:36,852 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:36,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:36,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 14:38:36,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 14:38:36,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 14:38:36,872 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:36,873 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 27 states. [2018-10-04 14:38:37,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:37,077 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-10-04 14:38:37,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 14:38:37,078 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-04 14:38:37,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:37,078 INFO L225 Difference]: With dead ends: 81 [2018-10-04 14:38:37,078 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 14:38:37,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 24 [2018-10-04 14:38:37,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 14:38:37,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 14:38:37,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 14:38:37,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-10-04 14:38:37,083 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 52 [2018-10-04 14:38:37,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:37,083 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-10-04 14:38:37,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 14:38:37,083 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-10-04 14:38:37,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 14:38:37,083 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:37,083 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-10-04 14:38:37,084 INFO L423 AbstractCegarLoop]: === Iteration 72 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:37,084 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:37,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1638593223, now seen corresponding path program 69 times [2018-10-04 14:38:37,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:37,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:37,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:37,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:37,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:37,411 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:37,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:37,418 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:38:37,451 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-10-04 14:38:37,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:37,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:37,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:37,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 14:38:37,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 14:38:37,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 14:38:37,593 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:37,593 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 27 states. [2018-10-04 14:38:37,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:37,672 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-10-04 14:38:37,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 14:38:37,672 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-04 14:38:37,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:37,673 INFO L225 Difference]: With dead ends: 57 [2018-10-04 14:38:37,673 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 14:38:37,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 25 [2018-10-04 14:38:37,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 14:38:37,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-04 14:38:37,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 14:38:37,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-10-04 14:38:37,676 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2018-10-04 14:38:37,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:37,676 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-10-04 14:38:37,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 14:38:37,676 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-10-04 14:38:37,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 14:38:37,676 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:37,676 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1] [2018-10-04 14:38:37,676 INFO L423 AbstractCegarLoop]: === Iteration 73 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:37,677 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:37,677 INFO L82 PathProgramCache]: Analyzing trace with hash -743279161, now seen corresponding path program 70 times [2018-10-04 14:38:37,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:37,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:37,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:37,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:37,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:38,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:38,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:38,178 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:38:38,210 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:38:38,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:38,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:38,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:38,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 14:38:38,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 14:38:38,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 14:38:38,563 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:38,563 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 27 states. [2018-10-04 14:38:39,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:39,410 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2018-10-04 14:38:39,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 14:38:39,411 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2018-10-04 14:38:39,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:39,412 INFO L225 Difference]: With dead ends: 83 [2018-10-04 14:38:39,412 INFO L226 Difference]: Without dead ends: 80 [2018-10-04 14:38:39,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.3s impTime 25 [2018-10-04 14:38:39,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-04 14:38:39,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2018-10-04 14:38:39,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 14:38:39,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-04 14:38:39,429 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-10-04 14:38:39,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:39,430 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-04 14:38:39,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 14:38:39,430 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-04 14:38:39,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 14:38:39,430 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:39,431 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-10-04 14:38:39,431 INFO L423 AbstractCegarLoop]: === Iteration 74 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:39,431 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:39,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1566879033, now seen corresponding path program 71 times [2018-10-04 14:38:39,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:39,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:39,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:39,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:39,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:39,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:39,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:39,969 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:38:40,005 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-10-04 14:38:40,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:40,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:40,124 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:40,145 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:40,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 14:38:40,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 14:38:40,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 14:38:40,146 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:40,146 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 28 states. [2018-10-04 14:38:40,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:40,365 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-10-04 14:38:40,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 14:38:40,365 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-04 14:38:40,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:40,366 INFO L225 Difference]: With dead ends: 84 [2018-10-04 14:38:40,366 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 14:38:40,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 25 [2018-10-04 14:38:40,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 14:38:40,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 14:38:40,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 14:38:40,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-10-04 14:38:40,370 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 54 [2018-10-04 14:38:40,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:40,371 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-10-04 14:38:40,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 14:38:40,371 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-10-04 14:38:40,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 14:38:40,371 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:40,371 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-10-04 14:38:40,372 INFO L423 AbstractCegarLoop]: === Iteration 75 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:40,372 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:40,372 INFO L82 PathProgramCache]: Analyzing trace with hash 399905389, now seen corresponding path program 72 times [2018-10-04 14:38:40,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:40,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:40,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:40,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:40,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:41,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:41,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:41,573 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:38:41,612 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-04 14:38:41,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:41,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:41,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:41,884 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 14:38:41,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 14:38:41,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 14:38:41,884 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:41,884 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 28 states. [2018-10-04 14:38:42,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:42,000 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-10-04 14:38:42,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 14:38:42,001 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-04 14:38:42,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:42,002 INFO L225 Difference]: With dead ends: 59 [2018-10-04 14:38:42,002 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 14:38:42,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.7s impTime 26 [2018-10-04 14:38:42,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 14:38:42,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 14:38:42,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 14:38:42,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-10-04 14:38:42,007 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 54 [2018-10-04 14:38:42,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:42,007 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-10-04 14:38:42,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 14:38:42,007 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-10-04 14:38:42,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 14:38:42,008 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:42,008 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1] [2018-10-04 14:38:42,008 INFO L423 AbstractCegarLoop]: === Iteration 76 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:42,008 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:42,008 INFO L82 PathProgramCache]: Analyzing trace with hash -487896351, now seen corresponding path program 73 times [2018-10-04 14:38:42,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:42,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:42,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:42,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:42,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:42,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:42,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:42,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:42,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:42,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:42,700 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 14:38:42,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 14:38:42,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 14:38:42,700 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:42,700 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 28 states. [2018-10-04 14:38:43,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:43,572 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-10-04 14:38:43,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 14:38:43,573 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 55 [2018-10-04 14:38:43,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:43,574 INFO L225 Difference]: With dead ends: 86 [2018-10-04 14:38:43,574 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 14:38:43,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 26 [2018-10-04 14:38:43,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 14:38:43,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2018-10-04 14:38:43,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 14:38:43,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-10-04 14:38:43,579 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2018-10-04 14:38:43,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:43,579 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-10-04 14:38:43,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 14:38:43,579 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-10-04 14:38:43,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 14:38:43,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:43,580 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-10-04 14:38:43,580 INFO L423 AbstractCegarLoop]: === Iteration 77 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:43,580 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:43,580 INFO L82 PathProgramCache]: Analyzing trace with hash 2055020781, now seen corresponding path program 74 times [2018-10-04 14:38:43,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:43,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:43,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:43,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:43,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:43,993 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:43,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:43,993 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:43,999 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:38:44,032 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:38:44,032 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:44,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:44,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:44,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 14:38:44,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 14:38:44,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 14:38:44,873 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:44,873 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 29 states. [2018-10-04 14:38:45,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:45,212 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2018-10-04 14:38:45,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 14:38:45,213 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-04 14:38:45,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:45,214 INFO L225 Difference]: With dead ends: 87 [2018-10-04 14:38:45,214 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 14:38:45,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.2s impTime 26 [2018-10-04 14:38:45,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 14:38:45,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 14:38:45,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 14:38:45,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-04 14:38:45,219 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 56 [2018-10-04 14:38:45,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:45,219 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-04 14:38:45,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 14:38:45,219 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-04 14:38:45,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 14:38:45,219 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:45,219 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-10-04 14:38:45,220 INFO L423 AbstractCegarLoop]: === Iteration 78 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:45,220 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:45,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1399171577, now seen corresponding path program 75 times [2018-10-04 14:38:45,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:45,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:45,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:45,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:45,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:45,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:45,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:45,555 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:38:45,591 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-10-04 14:38:45,591 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:45,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:45,712 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:45,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 14:38:45,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 14:38:45,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 14:38:45,712 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:45,713 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 29 states. [2018-10-04 14:38:45,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:45,798 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-04 14:38:45,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 14:38:45,799 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-04 14:38:45,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:45,800 INFO L225 Difference]: With dead ends: 61 [2018-10-04 14:38:45,800 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 14:38:45,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 27 [2018-10-04 14:38:45,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 14:38:45,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 14:38:45,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 14:38:45,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-10-04 14:38:45,804 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 56 [2018-10-04 14:38:45,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:45,804 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-10-04 14:38:45,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 14:38:45,804 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-10-04 14:38:45,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 14:38:45,805 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:45,805 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1] [2018-10-04 14:38:45,805 INFO L423 AbstractCegarLoop]: === Iteration 79 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:45,805 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:45,805 INFO L82 PathProgramCache]: Analyzing trace with hash -424707449, now seen corresponding path program 76 times [2018-10-04 14:38:45,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:45,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:45,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:45,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:45,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:46,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:46,391 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:46,400 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:38:46,433 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:38:46,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:46,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:46,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:46,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 14:38:46,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 14:38:46,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 14:38:46,617 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:46,617 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 29 states. [2018-10-04 14:38:47,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:47,602 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-10-04 14:38:47,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 14:38:47,603 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2018-10-04 14:38:47,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:47,604 INFO L225 Difference]: With dead ends: 89 [2018-10-04 14:38:47,604 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 14:38:47,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 27 [2018-10-04 14:38:47,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 14:38:47,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2018-10-04 14:38:47,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 14:38:47,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-10-04 14:38:47,609 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2018-10-04 14:38:47,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:47,609 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-10-04 14:38:47,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 14:38:47,609 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-10-04 14:38:47,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 14:38:47,610 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:47,610 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-10-04 14:38:47,610 INFO L423 AbstractCegarLoop]: === Iteration 80 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:47,610 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:47,610 INFO L82 PathProgramCache]: Analyzing trace with hash -281090553, now seen corresponding path program 77 times [2018-10-04 14:38:47,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:47,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:47,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:47,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:47,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:48,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:48,089 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:48,095 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:38:48,138 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2018-10-04 14:38:48,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:48,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:48,235 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:48,255 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:48,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 14:38:48,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 14:38:48,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 14:38:48,256 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:48,256 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 30 states. [2018-10-04 14:38:48,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:48,432 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2018-10-04 14:38:48,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 14:38:48,432 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-04 14:38:48,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:48,433 INFO L225 Difference]: With dead ends: 90 [2018-10-04 14:38:48,433 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 14:38:48,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 27 [2018-10-04 14:38:48,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 14:38:48,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 14:38:48,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 14:38:48,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-04 14:38:48,439 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 58 [2018-10-04 14:38:48,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:48,439 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-04 14:38:48,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 14:38:48,439 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-04 14:38:48,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 14:38:48,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:48,440 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-10-04 14:38:48,440 INFO L423 AbstractCegarLoop]: === Iteration 81 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:48,440 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:48,440 INFO L82 PathProgramCache]: Analyzing trace with hash 13128749, now seen corresponding path program 78 times [2018-10-04 14:38:48,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:48,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:48,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:48,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:48,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:48,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:48,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:48,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:48,746 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:38:48,784 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-10-04 14:38:48,785 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:48,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:48,880 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:48,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:48,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 14:38:48,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 14:38:48,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 14:38:48,901 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:48,901 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 30 states. [2018-10-04 14:38:49,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:49,128 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-10-04 14:38:49,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 14:38:49,129 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-04 14:38:49,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:49,130 INFO L225 Difference]: With dead ends: 63 [2018-10-04 14:38:49,130 INFO L226 Difference]: Without dead ends: 60 [2018-10-04 14:38:49,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 28 [2018-10-04 14:38:49,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-04 14:38:49,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-04 14:38:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 14:38:49,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-10-04 14:38:49,135 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 58 [2018-10-04 14:38:49,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:49,135 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-10-04 14:38:49,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 14:38:49,135 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-10-04 14:38:49,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 14:38:49,136 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:49,136 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1] [2018-10-04 14:38:49,136 INFO L423 AbstractCegarLoop]: === Iteration 82 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:49,136 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:49,137 INFO L82 PathProgramCache]: Analyzing trace with hash 406929697, now seen corresponding path program 79 times [2018-10-04 14:38:49,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:49,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:49,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:49,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:49,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:49,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:50,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:50,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:50,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:50,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:50,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:50,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:50,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 14:38:50,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 14:38:50,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 14:38:50,781 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:50,781 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 30 states. [2018-10-04 14:38:51,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:51,891 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-10-04 14:38:51,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 14:38:51,892 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2018-10-04 14:38:51,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:51,893 INFO L225 Difference]: With dead ends: 92 [2018-10-04 14:38:51,893 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 14:38:51,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime 28 [2018-10-04 14:38:51,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 14:38:51,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2018-10-04 14:38:51,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 14:38:51,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2018-10-04 14:38:51,897 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2018-10-04 14:38:51,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:51,898 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2018-10-04 14:38:51,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 14:38:51,898 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2018-10-04 14:38:51,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 14:38:51,898 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:51,898 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-10-04 14:38:51,898 INFO L423 AbstractCegarLoop]: === Iteration 83 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:51,898 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:51,898 INFO L82 PathProgramCache]: Analyzing trace with hash -270142803, now seen corresponding path program 80 times [2018-10-04 14:38:51,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:51,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:51,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:51,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:51,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:51,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:52,288 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:52,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:52,289 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:52,295 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:38:52,331 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:38:52,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:52,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:52,496 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:52,517 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:52,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 14:38:52,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 14:38:52,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 14:38:52,518 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:52,518 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 31 states. [2018-10-04 14:38:52,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:52,800 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-10-04 14:38:52,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 14:38:52,801 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-04 14:38:52,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:52,801 INFO L225 Difference]: With dead ends: 93 [2018-10-04 14:38:52,802 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 14:38:52,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 28 [2018-10-04 14:38:52,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 14:38:52,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 14:38:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 14:38:52,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-10-04 14:38:52,807 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 60 [2018-10-04 14:38:52,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:52,807 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-10-04 14:38:52,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 14:38:52,807 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-10-04 14:38:52,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 14:38:52,808 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:52,808 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-10-04 14:38:52,808 INFO L423 AbstractCegarLoop]: === Iteration 84 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:52,808 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:52,808 INFO L82 PathProgramCache]: Analyzing trace with hash 260720967, now seen corresponding path program 81 times [2018-10-04 14:38:52,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:52,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:52,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:52,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:52,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:53,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:53,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:53,366 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:38:53,405 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 14:38:53,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:53,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:53,526 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:53,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:53,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 14:38:53,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 14:38:53,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 14:38:53,548 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:53,548 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 31 states. [2018-10-04 14:38:53,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:53,669 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-10-04 14:38:53,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 14:38:53,669 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-04 14:38:53,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:53,670 INFO L225 Difference]: With dead ends: 65 [2018-10-04 14:38:53,670 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 14:38:53,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.2s impTime 29 [2018-10-04 14:38:53,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 14:38:53,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-04 14:38:53,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 14:38:53,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2018-10-04 14:38:53,676 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 60 [2018-10-04 14:38:53,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:53,677 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2018-10-04 14:38:53,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 14:38:53,677 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2018-10-04 14:38:53,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-04 14:38:53,677 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:53,677 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1] [2018-10-04 14:38:53,678 INFO L423 AbstractCegarLoop]: === Iteration 85 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:53,678 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:53,678 INFO L82 PathProgramCache]: Analyzing trace with hash -507646137, now seen corresponding path program 82 times [2018-10-04 14:38:53,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:53,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:53,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:53,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:53,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:54,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:54,581 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-04 14:38:54,600 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:54,642 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:38:54,642 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:54,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:54,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:54,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 14:38:54,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 14:38:54,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 14:38:54,798 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:54,798 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 31 states. [2018-10-04 14:38:55,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:55,960 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2018-10-04 14:38:55,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 14:38:55,961 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2018-10-04 14:38:55,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:55,962 INFO L225 Difference]: With dead ends: 95 [2018-10-04 14:38:55,962 INFO L226 Difference]: Without dead ends: 92 [2018-10-04 14:38:55,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 29 [2018-10-04 14:38:55,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-04 14:38:55,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 64. [2018-10-04 14:38:55,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 14:38:55,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-10-04 14:38:55,972 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2018-10-04 14:38:55,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:55,972 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-10-04 14:38:55,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 14:38:55,972 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-10-04 14:38:55,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 14:38:55,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:55,974 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-10-04 14:38:55,974 INFO L423 AbstractCegarLoop]: === Iteration 86 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:55,974 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:55,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1442777415, now seen corresponding path program 83 times [2018-10-04 14:38:55,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:55,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:55,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:55,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:55,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:56,866 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:56,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:56,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:56,874 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:38:56,920 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 14:38:56,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:56,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:57,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:57,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 14:38:57,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 14:38:57,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 14:38:57,093 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:57,093 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 32 states. [2018-10-04 14:38:57,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:57,282 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2018-10-04 14:38:57,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 14:38:57,282 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-04 14:38:57,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:57,283 INFO L225 Difference]: With dead ends: 96 [2018-10-04 14:38:57,283 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 14:38:57,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 29 [2018-10-04 14:38:57,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 14:38:57,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 14:38:57,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 14:38:57,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-04 14:38:57,288 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 62 [2018-10-04 14:38:57,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:57,288 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-04 14:38:57,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 14:38:57,288 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-04 14:38:57,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 14:38:57,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:57,289 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-10-04 14:38:57,289 INFO L423 AbstractCegarLoop]: === Iteration 87 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:57,289 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:57,289 INFO L82 PathProgramCache]: Analyzing trace with hash 719685101, now seen corresponding path program 84 times [2018-10-04 14:38:57,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:57,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:57,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:57,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:57,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:57,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:57,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:57,746 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:57,757 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:38:57,813 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 14:38:57,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:57,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:57,920 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:57,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:57,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 14:38:57,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 14:38:57,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 14:38:57,941 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:57,941 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 32 states. [2018-10-04 14:38:58,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:58,029 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-10-04 14:38:58,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 14:38:58,030 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-04 14:38:58,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:58,030 INFO L225 Difference]: With dead ends: 67 [2018-10-04 14:38:58,030 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 14:38:58,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.1s impTime 30 [2018-10-04 14:38:58,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 14:38:58,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-04 14:38:58,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 14:38:58,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-10-04 14:38:58,034 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 62 [2018-10-04 14:38:58,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:58,035 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-10-04 14:38:58,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 14:38:58,035 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-10-04 14:38:58,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-04 14:38:58,035 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:58,035 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1] [2018-10-04 14:38:58,035 INFO L423 AbstractCegarLoop]: === Iteration 88 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:58,035 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:58,035 INFO L82 PathProgramCache]: Analyzing trace with hash 835340129, now seen corresponding path program 85 times [2018-10-04 14:38:58,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:58,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:58,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:58,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:58,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:58,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:58,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:58,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:58,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:58,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:58,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:58,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 14:38:58,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 14:38:58,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 14:38:58,903 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:58,904 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 32 states. [2018-10-04 14:39:00,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:00,096 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-10-04 14:39:00,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 14:39:00,097 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 63 [2018-10-04 14:39:00,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:00,098 INFO L225 Difference]: With dead ends: 98 [2018-10-04 14:39:00,098 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 14:39:00,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 30 [2018-10-04 14:39:00,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 14:39:00,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 66. [2018-10-04 14:39:00,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 14:39:00,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-10-04 14:39:00,104 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2018-10-04 14:39:00,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:00,104 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-10-04 14:39:00,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 14:39:00,105 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-10-04 14:39:00,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 14:39:00,105 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:00,105 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-10-04 14:39:00,105 INFO L423 AbstractCegarLoop]: === Iteration 89 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:00,106 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:00,106 INFO L82 PathProgramCache]: Analyzing trace with hash 125678701, now seen corresponding path program 86 times [2018-10-04 14:39:00,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:00,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:00,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:00,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:39:00,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:00,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:00,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:00,851 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:39:00,919 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:39:00,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:00,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:01,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:01,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 14:39:01,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 14:39:01,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 14:39:01,083 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:01,083 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 33 states. [2018-10-04 14:39:01,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:01,435 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2018-10-04 14:39:01,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 14:39:01,436 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-04 14:39:01,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:01,437 INFO L225 Difference]: With dead ends: 99 [2018-10-04 14:39:01,437 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 14:39:01,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 30 [2018-10-04 14:39:01,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 14:39:01,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 14:39:01,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 14:39:01,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-10-04 14:39:01,442 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 64 [2018-10-04 14:39:01,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:01,442 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-10-04 14:39:01,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 14:39:01,442 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-10-04 14:39:01,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 14:39:01,443 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:01,443 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-10-04 14:39:01,443 INFO L423 AbstractCegarLoop]: === Iteration 90 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:01,443 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:01,443 INFO L82 PathProgramCache]: Analyzing trace with hash -815346553, now seen corresponding path program 87 times [2018-10-04 14:39:01,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:01,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:01,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:01,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:01,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:01,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:01,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:01,757 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:39:01,801 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-04 14:39:01,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:01,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:01,932 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:01,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:01,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 14:39:01,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 14:39:01,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 14:39:01,952 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:01,952 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 33 states. [2018-10-04 14:39:02,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:02,044 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-10-04 14:39:02,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 14:39:02,045 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-04 14:39:02,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:02,046 INFO L225 Difference]: With dead ends: 69 [2018-10-04 14:39:02,046 INFO L226 Difference]: Without dead ends: 66 [2018-10-04 14:39:02,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 31 [2018-10-04 14:39:02,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-04 14:39:02,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-04 14:39:02,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 14:39:02,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-10-04 14:39:02,050 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 64 [2018-10-04 14:39:02,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:02,050 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-10-04 14:39:02,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 14:39:02,050 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-10-04 14:39:02,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 14:39:02,051 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:02,051 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1] [2018-10-04 14:39:02,051 INFO L423 AbstractCegarLoop]: === Iteration 91 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:02,051 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:02,051 INFO L82 PathProgramCache]: Analyzing trace with hash 493999111, now seen corresponding path program 88 times [2018-10-04 14:39:02,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:02,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:02,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:02,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:02,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:02,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:02,789 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:02,795 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:39:02,829 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:39:02,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:02,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:03,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:03,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 14:39:03,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 14:39:03,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 14:39:03,077 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:03,077 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 33 states. [2018-10-04 14:39:04,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:04,363 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-10-04 14:39:04,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 14:39:04,363 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2018-10-04 14:39:04,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:04,364 INFO L225 Difference]: With dead ends: 101 [2018-10-04 14:39:04,364 INFO L226 Difference]: Without dead ends: 98 [2018-10-04 14:39:04,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 31 [2018-10-04 14:39:04,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-04 14:39:04,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 68. [2018-10-04 14:39:04,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 14:39:04,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-10-04 14:39:04,370 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-10-04 14:39:04,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:04,371 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-10-04 14:39:04,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 14:39:04,371 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-10-04 14:39:04,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 14:39:04,371 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:04,371 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-10-04 14:39:04,372 INFO L423 AbstractCegarLoop]: === Iteration 92 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:04,372 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:04,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1865958265, now seen corresponding path program 89 times [2018-10-04 14:39:04,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:04,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:04,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:04,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:04,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:05,166 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:05,166 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:05,174 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:39:05,225 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-10-04 14:39:05,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:05,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:05,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:05,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 14:39:05,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 14:39:05,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 14:39:05,503 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:05,503 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 34 states. [2018-10-04 14:39:05,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:05,905 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2018-10-04 14:39:05,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 14:39:05,906 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-04 14:39:05,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:05,907 INFO L225 Difference]: With dead ends: 102 [2018-10-04 14:39:05,907 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 14:39:05,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 31 [2018-10-04 14:39:05,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 14:39:05,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 14:39:05,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 14:39:05,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-04 14:39:05,912 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 66 [2018-10-04 14:39:05,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:05,913 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-04 14:39:05,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 14:39:05,913 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-04 14:39:05,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 14:39:05,913 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:05,913 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-10-04 14:39:05,913 INFO L423 AbstractCegarLoop]: === Iteration 93 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:05,913 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:05,914 INFO L82 PathProgramCache]: Analyzing trace with hash -972970067, now seen corresponding path program 90 times [2018-10-04 14:39:05,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:05,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:05,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:05,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:05,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:06,216 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:06,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:06,216 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:06,224 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:39:06,268 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-04 14:39:06,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:06,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:06,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:06,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 14:39:06,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 14:39:06,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 14:39:06,423 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:06,423 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 34 states. [2018-10-04 14:39:06,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:06,520 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2018-10-04 14:39:06,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 14:39:06,521 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-04 14:39:06,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:06,522 INFO L225 Difference]: With dead ends: 71 [2018-10-04 14:39:06,522 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 14:39:06,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 32 [2018-10-04 14:39:06,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 14:39:06,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-04 14:39:06,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 14:39:06,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2018-10-04 14:39:06,527 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 66 [2018-10-04 14:39:06,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:06,527 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2018-10-04 14:39:06,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 14:39:06,527 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2018-10-04 14:39:06,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-04 14:39:06,527 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:06,527 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1] [2018-10-04 14:39:06,528 INFO L423 AbstractCegarLoop]: === Iteration 94 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:06,528 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:06,528 INFO L82 PathProgramCache]: Analyzing trace with hash -97362527, now seen corresponding path program 91 times [2018-10-04 14:39:06,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:06,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:06,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:06,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:06,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:06,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:07,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:07,299 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:07,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:39:07,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:07,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:07,760 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:07,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:07,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 14:39:07,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 14:39:07,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 14:39:07,780 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:07,780 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 34 states. [2018-10-04 14:39:09,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:09,119 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-10-04 14:39:09,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 14:39:09,120 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 67 [2018-10-04 14:39:09,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:09,121 INFO L225 Difference]: With dead ends: 104 [2018-10-04 14:39:09,121 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 14:39:09,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.5s impTime 32 [2018-10-04 14:39:09,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 14:39:09,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 70. [2018-10-04 14:39:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 14:39:09,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-10-04 14:39:09,126 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2018-10-04 14:39:09,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:09,126 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-10-04 14:39:09,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 14:39:09,126 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-10-04 14:39:09,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 14:39:09,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:09,127 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-10-04 14:39:09,127 INFO L423 AbstractCegarLoop]: === Iteration 95 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:09,127 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:09,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1276667437, now seen corresponding path program 92 times [2018-10-04 14:39:09,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:09,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:09,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:09,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:39:09,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:09,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:09,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:09,538 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:39:09,577 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:39:09,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:09,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:10,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:10,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 14:39:10,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 14:39:10,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 14:39:10,253 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:10,253 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 35 states. [2018-10-04 14:39:11,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:11,106 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2018-10-04 14:39:11,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 14:39:11,106 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-04 14:39:11,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:11,107 INFO L225 Difference]: With dead ends: 105 [2018-10-04 14:39:11,107 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 14:39:11,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.2s impTime 32 [2018-10-04 14:39:11,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 14:39:11,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 14:39:11,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 14:39:11,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-04 14:39:11,112 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 68 [2018-10-04 14:39:11,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:11,112 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-04 14:39:11,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 14:39:11,113 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-04 14:39:11,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 14:39:11,113 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:11,113 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-10-04 14:39:11,113 INFO L423 AbstractCegarLoop]: === Iteration 96 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:11,113 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:11,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1105469497, now seen corresponding path program 93 times [2018-10-04 14:39:11,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:11,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:11,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:11,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:11,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:11,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:11,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:11,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:11,845 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:39:11,893 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-10-04 14:39:11,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:11,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:12,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:12,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:12,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 14:39:12,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 14:39:12,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 14:39:12,092 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:12,092 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 35 states. [2018-10-04 14:39:12,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:12,226 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-04 14:39:12,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 14:39:12,227 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-04 14:39:12,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:12,228 INFO L225 Difference]: With dead ends: 73 [2018-10-04 14:39:12,228 INFO L226 Difference]: Without dead ends: 70 [2018-10-04 14:39:12,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 33 [2018-10-04 14:39:12,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-04 14:39:12,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-04 14:39:12,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 14:39:12,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-10-04 14:39:12,233 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2018-10-04 14:39:12,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:12,233 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-10-04 14:39:12,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 14:39:12,233 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-10-04 14:39:12,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-04 14:39:12,233 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:12,234 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1] [2018-10-04 14:39:12,234 INFO L423 AbstractCegarLoop]: === Iteration 97 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:12,234 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:12,234 INFO L82 PathProgramCache]: Analyzing trace with hash 90122439, now seen corresponding path program 94 times [2018-10-04 14:39:12,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:12,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:12,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:12,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:12,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:12,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:12,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:13,002 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:39:13,044 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:39:13,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:13,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:13,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:13,276 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:13,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 14:39:13,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 14:39:13,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 14:39:13,277 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:13,277 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 35 states. [2018-10-04 14:39:14,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:14,673 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2018-10-04 14:39:14,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 14:39:14,674 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 69 [2018-10-04 14:39:14,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:14,675 INFO L225 Difference]: With dead ends: 107 [2018-10-04 14:39:14,675 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 14:39:14,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 33 [2018-10-04 14:39:14,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 14:39:14,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2018-10-04 14:39:14,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-04 14:39:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2018-10-04 14:39:14,681 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2018-10-04 14:39:14,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:14,681 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2018-10-04 14:39:14,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 14:39:14,681 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2018-10-04 14:39:14,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 14:39:14,682 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:14,682 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-10-04 14:39:14,682 INFO L423 AbstractCegarLoop]: === Iteration 98 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:14,682 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:14,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1501233209, now seen corresponding path program 95 times [2018-10-04 14:39:14,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:14,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:14,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:14,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:14,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:15,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:15,238 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:15,249 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:39:15,298 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-04 14:39:15,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:15,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:15,442 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:15,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 14:39:15,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 14:39:15,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 14:39:15,443 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:15,443 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 36 states. [2018-10-04 14:39:15,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:15,853 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-10-04 14:39:15,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 14:39:15,854 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-04 14:39:15,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:15,855 INFO L225 Difference]: With dead ends: 108 [2018-10-04 14:39:15,855 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 14:39:15,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 33 [2018-10-04 14:39:15,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 14:39:15,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-04 14:39:15,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 14:39:15,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-10-04 14:39:15,860 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 70 [2018-10-04 14:39:15,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:15,860 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-10-04 14:39:15,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 14:39:15,860 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-10-04 14:39:15,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 14:39:15,860 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:15,860 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-10-04 14:39:15,861 INFO L423 AbstractCegarLoop]: === Iteration 99 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:15,861 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:15,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1961933165, now seen corresponding path program 96 times [2018-10-04 14:39:15,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:15,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:15,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:15,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:15,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:16,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:16,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:16,247 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:39:16,293 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-10-04 14:39:16,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:16,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:16,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:16,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 14:39:16,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 14:39:16,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 14:39:16,458 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:16,458 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 36 states. [2018-10-04 14:39:16,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:16,561 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-10-04 14:39:16,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 14:39:16,562 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-04 14:39:16,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:16,563 INFO L225 Difference]: With dead ends: 75 [2018-10-04 14:39:16,563 INFO L226 Difference]: Without dead ends: 72 [2018-10-04 14:39:16,563 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 34 [2018-10-04 14:39:16,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-04 14:39:16,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-04 14:39:16,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-04 14:39:16,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-10-04 14:39:16,569 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 70 [2018-10-04 14:39:16,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:16,569 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-10-04 14:39:16,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 14:39:16,569 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-10-04 14:39:16,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-04 14:39:16,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:16,570 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1] [2018-10-04 14:39:16,570 INFO L423 AbstractCegarLoop]: === Iteration 100 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:16,570 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:16,570 INFO L82 PathProgramCache]: Analyzing trace with hash 690324449, now seen corresponding path program 97 times [2018-10-04 14:39:16,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:16,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:16,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:16,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:16,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:17,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:17,387 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:17,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:39:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:17,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:17,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:17,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 14:39:17,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 14:39:17,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 14:39:17,599 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:17,599 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 36 states. [2018-10-04 14:39:19,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:19,082 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-10-04 14:39:19,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 14:39:19,082 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 71 [2018-10-04 14:39:19,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:19,083 INFO L225 Difference]: With dead ends: 110 [2018-10-04 14:39:19,084 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 14:39:19,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime 34 [2018-10-04 14:39:19,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 14:39:19,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 74. [2018-10-04 14:39:19,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-04 14:39:19,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2018-10-04 14:39:19,089 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2018-10-04 14:39:19,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:19,089 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2018-10-04 14:39:19,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 14:39:19,089 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2018-10-04 14:39:19,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 14:39:19,090 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:19,090 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-10-04 14:39:19,090 INFO L423 AbstractCegarLoop]: === Iteration 101 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:19,090 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:19,090 INFO L82 PathProgramCache]: Analyzing trace with hash -74840083, now seen corresponding path program 98 times [2018-10-04 14:39:19,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:19,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:19,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:19,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:39:19,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:19,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:19,826 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:19,833 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:39:19,875 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:39:19,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:19,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:20,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:20,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:20,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 14:39:20,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 14:39:20,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 14:39:20,109 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:20,109 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 37 states. [2018-10-04 14:39:20,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:20,478 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-10-04 14:39:20,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 14:39:20,478 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-04 14:39:20,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:20,479 INFO L225 Difference]: With dead ends: 111 [2018-10-04 14:39:20,479 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 14:39:20,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 34 [2018-10-04 14:39:20,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 14:39:20,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 14:39:20,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 14:39:20,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-10-04 14:39:20,485 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 72 [2018-10-04 14:39:20,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:20,485 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-10-04 14:39:20,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 14:39:20,485 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-10-04 14:39:20,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 14:39:20,486 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:20,486 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-10-04 14:39:20,486 INFO L423 AbstractCegarLoop]: === Iteration 102 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:20,486 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:20,486 INFO L82 PathProgramCache]: Analyzing trace with hash -90864889, now seen corresponding path program 99 times [2018-10-04 14:39:20,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:20,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:20,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:20,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:20,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:20,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:20,937 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:20,943 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:39:21,007 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 14:39:21,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:21,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:21,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:21,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 14:39:21,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 14:39:21,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 14:39:21,148 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:21,148 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 37 states. [2018-10-04 14:39:21,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:21,260 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-10-04 14:39:21,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 14:39:21,260 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-04 14:39:21,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:21,261 INFO L225 Difference]: With dead ends: 77 [2018-10-04 14:39:21,261 INFO L226 Difference]: Without dead ends: 74 [2018-10-04 14:39:21,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 35 [2018-10-04 14:39:21,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-04 14:39:21,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-04 14:39:21,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-04 14:39:21,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2018-10-04 14:39:21,267 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 72 [2018-10-04 14:39:21,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:21,267 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2018-10-04 14:39:21,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 14:39:21,267 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2018-10-04 14:39:21,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-04 14:39:21,267 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:21,267 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1] [2018-10-04 14:39:21,268 INFO L423 AbstractCegarLoop]: === Iteration 103 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:21,268 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:21,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1478094215, now seen corresponding path program 100 times [2018-10-04 14:39:21,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:21,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:21,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:21,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:21,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:21,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:22,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:22,137 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:22,144 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:39:22,190 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:39:22,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:22,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:22,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:22,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:22,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 14:39:22,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 14:39:22,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 14:39:22,358 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:22,358 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 37 states. [2018-10-04 14:39:23,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:23,929 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2018-10-04 14:39:23,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 14:39:23,929 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 73 [2018-10-04 14:39:23,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:23,930 INFO L225 Difference]: With dead ends: 113 [2018-10-04 14:39:23,930 INFO L226 Difference]: Without dead ends: 110 [2018-10-04 14:39:23,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime 35 [2018-10-04 14:39:23,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-04 14:39:23,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2018-10-04 14:39:23,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 14:39:23,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-10-04 14:39:23,935 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2018-10-04 14:39:23,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:23,935 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-10-04 14:39:23,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 14:39:23,935 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-10-04 14:39:23,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 14:39:23,936 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:23,936 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-10-04 14:39:23,936 INFO L423 AbstractCegarLoop]: === Iteration 104 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:23,936 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:23,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1423781113, now seen corresponding path program 101 times [2018-10-04 14:39:23,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:23,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:23,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:23,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:23,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:24,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:24,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:24,926 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:24,934 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:39:24,988 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 14:39:24,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:24,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:25,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:25,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 14:39:25,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 14:39:25,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 14:39:25,383 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:25,383 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 38 states. [2018-10-04 14:39:25,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:25,790 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2018-10-04 14:39:25,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 14:39:25,790 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-04 14:39:25,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:25,791 INFO L225 Difference]: With dead ends: 114 [2018-10-04 14:39:25,791 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 14:39:25,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.7s impTime 35 [2018-10-04 14:39:25,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 14:39:25,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-04 14:39:25,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 14:39:25,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-04 14:39:25,797 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 74 [2018-10-04 14:39:25,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:25,797 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-04 14:39:25,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 14:39:25,797 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-04 14:39:25,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 14:39:25,798 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:25,798 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-10-04 14:39:25,798 INFO L423 AbstractCegarLoop]: === Iteration 105 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:25,798 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:25,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1920550099, now seen corresponding path program 102 times [2018-10-04 14:39:25,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:25,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:25,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:25,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:25,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:26,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:26,431 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:26,439 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:39:26,488 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 14:39:26,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:26,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:26,642 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:26,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 14:39:26,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 14:39:26,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 14:39:26,643 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:26,643 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 38 states. [2018-10-04 14:39:26,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:26,772 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-10-04 14:39:26,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 14:39:26,772 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-04 14:39:26,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:26,773 INFO L225 Difference]: With dead ends: 79 [2018-10-04 14:39:26,773 INFO L226 Difference]: Without dead ends: 76 [2018-10-04 14:39:26,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.3s impTime 36 [2018-10-04 14:39:26,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-04 14:39:26,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-04 14:39:26,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 14:39:26,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2018-10-04 14:39:26,780 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 74 [2018-10-04 14:39:26,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:26,780 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2018-10-04 14:39:26,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 14:39:26,780 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2018-10-04 14:39:26,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-04 14:39:26,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:26,781 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1] [2018-10-04 14:39:26,781 INFO L423 AbstractCegarLoop]: === Iteration 106 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:26,781 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:26,782 INFO L82 PathProgramCache]: Analyzing trace with hash 592427553, now seen corresponding path program 103 times [2018-10-04 14:39:26,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:26,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:26,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:26,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:26,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:27,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:27,671 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:27,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:39:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:27,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:27,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:27,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 14:39:27,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 14:39:27,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 14:39:27,890 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:27,890 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 38 states. [2018-10-04 14:39:29,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:29,556 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-10-04 14:39:29,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 14:39:29,556 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 75 [2018-10-04 14:39:29,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:29,558 INFO L225 Difference]: With dead ends: 116 [2018-10-04 14:39:29,558 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 14:39:29,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime 36 [2018-10-04 14:39:29,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 14:39:29,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 78. [2018-10-04 14:39:29,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-04 14:39:29,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2018-10-04 14:39:29,564 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2018-10-04 14:39:29,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:29,564 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2018-10-04 14:39:29,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 14:39:29,565 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2018-10-04 14:39:29,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 14:39:29,565 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:29,565 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-10-04 14:39:29,565 INFO L423 AbstractCegarLoop]: === Iteration 107 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:29,565 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:29,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1185323437, now seen corresponding path program 104 times [2018-10-04 14:39:29,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:29,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:29,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:29,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:39:29,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:30,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:30,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:30,168 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:39:30,218 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:39:30,218 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:30,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:30,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:30,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 14:39:30,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 14:39:30,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 14:39:30,499 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:30,499 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 39 states. [2018-10-04 14:39:30,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:30,924 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2018-10-04 14:39:30,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 14:39:30,924 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-04 14:39:30,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:30,925 INFO L225 Difference]: With dead ends: 117 [2018-10-04 14:39:30,925 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 14:39:30,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 36 [2018-10-04 14:39:30,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 14:39:30,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 14:39:30,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 14:39:30,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-10-04 14:39:30,930 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 76 [2018-10-04 14:39:30,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:30,930 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-10-04 14:39:30,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 14:39:30,930 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-10-04 14:39:30,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 14:39:30,930 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:30,930 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-10-04 14:39:30,931 INFO L423 AbstractCegarLoop]: === Iteration 108 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:30,931 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:30,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1329613241, now seen corresponding path program 105 times [2018-10-04 14:39:30,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:30,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:30,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:30,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:30,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:30,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:31,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:31,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:31,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:31,352 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:39:31,405 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-10-04 14:39:31,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:31,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:31,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:31,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:31,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 14:39:31,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 14:39:31,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 14:39:31,587 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:31,587 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 39 states. [2018-10-04 14:39:31,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:31,705 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-10-04 14:39:31,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 14:39:31,705 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-04 14:39:31,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:31,706 INFO L225 Difference]: With dead ends: 81 [2018-10-04 14:39:31,706 INFO L226 Difference]: Without dead ends: 78 [2018-10-04 14:39:31,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 37 [2018-10-04 14:39:31,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-04 14:39:31,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-04 14:39:31,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-04 14:39:31,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-10-04 14:39:31,712 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 76 [2018-10-04 14:39:31,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:31,712 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-10-04 14:39:31,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 14:39:31,712 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-10-04 14:39:31,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-04 14:39:31,712 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:31,713 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1] [2018-10-04 14:39:31,713 INFO L423 AbstractCegarLoop]: === Iteration 109 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:31,713 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:31,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1731600967, now seen corresponding path program 106 times [2018-10-04 14:39:31,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:31,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:31,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:31,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:31,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:32,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:32,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:32,702 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:39:32,750 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:39:32,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:32,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:32,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:32,923 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:32,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 14:39:32,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 14:39:32,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 14:39:32,924 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:32,924 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 39 states. [2018-10-04 14:39:34,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:34,637 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2018-10-04 14:39:34,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 14:39:34,638 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 77 [2018-10-04 14:39:34,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:34,638 INFO L225 Difference]: With dead ends: 119 [2018-10-04 14:39:34,638 INFO L226 Difference]: Without dead ends: 116 [2018-10-04 14:39:34,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.7s impTime 37 [2018-10-04 14:39:34,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-04 14:39:34,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2018-10-04 14:39:34,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 14:39:34,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-10-04 14:39:34,644 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2018-10-04 14:39:34,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:34,644 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-10-04 14:39:34,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 14:39:34,644 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-10-04 14:39:34,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 14:39:34,645 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:34,645 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-10-04 14:39:34,645 INFO L423 AbstractCegarLoop]: === Iteration 110 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:34,645 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:34,645 INFO L82 PathProgramCache]: Analyzing trace with hash 2139960903, now seen corresponding path program 107 times [2018-10-04 14:39:34,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:34,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:34,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:34,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:34,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:34,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:35,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:35,275 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:35,275 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:35,282 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:39:35,340 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-10-04 14:39:35,340 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:35,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:35,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:35,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:35,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 14:39:35,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 14:39:35,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 14:39:35,507 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:35,507 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 40 states. [2018-10-04 14:39:35,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:35,933 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2018-10-04 14:39:35,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 14:39:35,934 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-04 14:39:35,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:35,934 INFO L225 Difference]: With dead ends: 120 [2018-10-04 14:39:35,934 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 14:39:35,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 37 [2018-10-04 14:39:35,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 14:39:35,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-04 14:39:35,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 14:39:35,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-10-04 14:39:35,940 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 78 [2018-10-04 14:39:35,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:35,940 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-10-04 14:39:35,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 14:39:35,940 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-10-04 14:39:35,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 14:39:35,940 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:35,940 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-10-04 14:39:35,941 INFO L423 AbstractCegarLoop]: === Iteration 111 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:35,941 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:35,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1486335213, now seen corresponding path program 108 times [2018-10-04 14:39:35,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:35,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:35,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:35,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:35,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:36,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:36,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:36,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:36,410 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:39:36,463 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-04 14:39:36,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:36,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:36,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:36,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:36,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 14:39:36,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 14:39:36,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 14:39:36,684 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:36,684 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 40 states. [2018-10-04 14:39:36,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:36,799 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2018-10-04 14:39:36,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 14:39:36,799 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-04 14:39:36,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:36,800 INFO L225 Difference]: With dead ends: 83 [2018-10-04 14:39:36,800 INFO L226 Difference]: Without dead ends: 80 [2018-10-04 14:39:36,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 38 [2018-10-04 14:39:36,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-04 14:39:36,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-04 14:39:36,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 14:39:36,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-10-04 14:39:36,806 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 78 [2018-10-04 14:39:36,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:36,806 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-10-04 14:39:36,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 14:39:36,806 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-10-04 14:39:36,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-04 14:39:36,807 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:36,807 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1] [2018-10-04 14:39:36,807 INFO L423 AbstractCegarLoop]: === Iteration 112 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:36,807 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:36,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1168310175, now seen corresponding path program 109 times [2018-10-04 14:39:36,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:36,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:36,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:36,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:36,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:37,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:37,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:37,752 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:37,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:39:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:37,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:37,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:37,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 14:39:37,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 14:39:37,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 14:39:37,970 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:37,970 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 40 states. [2018-10-04 14:39:39,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:39,713 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-10-04 14:39:39,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 14:39:39,713 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 79 [2018-10-04 14:39:39,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:39,714 INFO L225 Difference]: With dead ends: 122 [2018-10-04 14:39:39,714 INFO L226 Difference]: Without dead ends: 119 [2018-10-04 14:39:39,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.7s impTime 38 [2018-10-04 14:39:39,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-04 14:39:39,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 82. [2018-10-04 14:39:39,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-04 14:39:39,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-10-04 14:39:39,721 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2018-10-04 14:39:39,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:39,722 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-10-04 14:39:39,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 14:39:39,722 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-10-04 14:39:39,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 14:39:39,722 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:39,722 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-10-04 14:39:39,723 INFO L423 AbstractCegarLoop]: === Iteration 113 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:39,723 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:39,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1857938579, now seen corresponding path program 110 times [2018-10-04 14:39:39,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:39,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:39,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:39,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:39:39,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:40,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:40,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:40,312 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:40,319 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:39:40,364 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:39:40,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:40,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:40,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:40,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 14:39:40,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 14:39:40,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 14:39:40,516 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:40,516 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 41 states. [2018-10-04 14:39:40,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:40,883 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2018-10-04 14:39:40,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 14:39:40,884 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-04 14:39:40,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:40,884 INFO L225 Difference]: With dead ends: 123 [2018-10-04 14:39:40,884 INFO L226 Difference]: Without dead ends: 81 [2018-10-04 14:39:40,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 38 [2018-10-04 14:39:40,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-04 14:39:40,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-04 14:39:40,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 14:39:40,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-04 14:39:40,890 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 80 [2018-10-04 14:39:40,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:40,890 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-04 14:39:40,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 14:39:40,890 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-04 14:39:40,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 14:39:40,891 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:40,891 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-10-04 14:39:40,891 INFO L423 AbstractCegarLoop]: === Iteration 114 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:40,891 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:40,891 INFO L82 PathProgramCache]: Analyzing trace with hash -645498489, now seen corresponding path program 111 times [2018-10-04 14:39:40,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:40,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:40,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:40,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:40,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:41,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:41,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:41,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:41,368 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:39:41,421 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-10-04 14:39:41,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:41,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:41,585 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:41,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 14:39:41,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 14:39:41,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 14:39:41,586 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:41,586 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 41 states. [2018-10-04 14:39:41,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:41,702 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-04 14:39:41,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 14:39:41,702 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-04 14:39:41,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:41,703 INFO L225 Difference]: With dead ends: 85 [2018-10-04 14:39:41,703 INFO L226 Difference]: Without dead ends: 82 [2018-10-04 14:39:41,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 39 [2018-10-04 14:39:41,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-04 14:39:41,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-04 14:39:41,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-04 14:39:41,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2018-10-04 14:39:41,708 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 80 [2018-10-04 14:39:41,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:41,708 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2018-10-04 14:39:41,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 14:39:41,709 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2018-10-04 14:39:41,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-04 14:39:41,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:41,709 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1] [2018-10-04 14:39:41,709 INFO L423 AbstractCegarLoop]: === Iteration 115 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:41,709 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:41,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1464321799, now seen corresponding path program 112 times [2018-10-04 14:39:41,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:41,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:41,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:41,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:41,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:42,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:42,679 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:42,686 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:39:42,733 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:39:42,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:42,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:42,907 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:42,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 14:39:42,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 14:39:42,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 14:39:42,908 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:42,908 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 41 states. [2018-10-04 14:39:44,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:44,733 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2018-10-04 14:39:44,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 14:39:44,734 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 81 [2018-10-04 14:39:44,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:44,734 INFO L225 Difference]: With dead ends: 125 [2018-10-04 14:39:44,735 INFO L226 Difference]: Without dead ends: 122 [2018-10-04 14:39:44,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.7s impTime 39 [2018-10-04 14:39:44,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-04 14:39:44,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2018-10-04 14:39:44,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-04 14:39:44,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-10-04 14:39:44,741 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2018-10-04 14:39:44,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:44,742 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-10-04 14:39:44,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 14:39:44,742 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-10-04 14:39:44,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 14:39:44,742 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:44,742 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-10-04 14:39:44,743 INFO L423 AbstractCegarLoop]: === Iteration 116 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:44,743 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:44,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1850726009, now seen corresponding path program 113 times [2018-10-04 14:39:44,743 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:44,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:44,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:44,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:44,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:44,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:45,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:45,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:45,498 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:39:45,560 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2018-10-04 14:39:45,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:45,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:45,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:45,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 14:39:45,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 14:39:45,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 14:39:45,719 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:45,719 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 42 states. [2018-10-04 14:39:46,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:46,173 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2018-10-04 14:39:46,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 14:39:46,173 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-04 14:39:46,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:46,174 INFO L225 Difference]: With dead ends: 126 [2018-10-04 14:39:46,174 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 14:39:46,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 39 [2018-10-04 14:39:46,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 14:39:46,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-04 14:39:46,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 14:39:46,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-04 14:39:46,180 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 82 [2018-10-04 14:39:46,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:46,181 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-04 14:39:46,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 14:39:46,181 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-04 14:39:46,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 14:39:46,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:46,181 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-10-04 14:39:46,182 INFO L423 AbstractCegarLoop]: === Iteration 117 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:46,182 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:46,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1375178413, now seen corresponding path program 114 times [2018-10-04 14:39:46,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:46,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:46,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:46,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:46,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:46,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:46,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:46,607 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:39:46,664 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-10-04 14:39:46,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:46,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:46,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:46,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:46,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 14:39:46,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 14:39:46,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 14:39:46,844 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:46,845 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 42 states. [2018-10-04 14:39:46,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:46,968 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2018-10-04 14:39:46,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 14:39:46,969 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-04 14:39:46,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:46,969 INFO L225 Difference]: With dead ends: 87 [2018-10-04 14:39:46,970 INFO L226 Difference]: Without dead ends: 84 [2018-10-04 14:39:46,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 40 [2018-10-04 14:39:46,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-04 14:39:46,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-04 14:39:46,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-04 14:39:46,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-10-04 14:39:46,975 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 82 [2018-10-04 14:39:46,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:46,975 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-10-04 14:39:46,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 14:39:46,975 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-10-04 14:39:46,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 14:39:46,976 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:46,976 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1] [2018-10-04 14:39:46,976 INFO L423 AbstractCegarLoop]: === Iteration 118 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:46,976 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:46,976 INFO L82 PathProgramCache]: Analyzing trace with hash -319203679, now seen corresponding path program 115 times [2018-10-04 14:39:46,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:46,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:46,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:46,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:46,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:46,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:48,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:48,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:48,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:39:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:48,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:48,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:48,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 14:39:48,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 14:39:48,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 14:39:48,258 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:48,258 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 42 states. [2018-10-04 14:39:50,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:50,167 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-10-04 14:39:50,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 14:39:50,168 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 83 [2018-10-04 14:39:50,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:50,169 INFO L225 Difference]: With dead ends: 128 [2018-10-04 14:39:50,169 INFO L226 Difference]: Without dead ends: 125 [2018-10-04 14:39:50,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.8s impTime 40 [2018-10-04 14:39:50,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-04 14:39:50,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2018-10-04 14:39:50,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 14:39:50,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-10-04 14:39:50,175 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2018-10-04 14:39:50,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:50,175 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-10-04 14:39:50,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 14:39:50,175 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-10-04 14:39:50,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 14:39:50,175 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:50,175 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-10-04 14:39:50,176 INFO L423 AbstractCegarLoop]: === Iteration 119 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:50,176 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:50,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1305440979, now seen corresponding path program 116 times [2018-10-04 14:39:50,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:50,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:50,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:50,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:39:50,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:50,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:50,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:50,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:50,701 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:39:50,749 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:39:50,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:50,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:50,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:50,895 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:50,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 14:39:50,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 14:39:50,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 14:39:50,896 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:50,896 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 43 states. [2018-10-04 14:39:51,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:51,210 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2018-10-04 14:39:51,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 14:39:51,211 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-04 14:39:51,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:51,211 INFO L225 Difference]: With dead ends: 129 [2018-10-04 14:39:51,211 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 14:39:51,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 40 [2018-10-04 14:39:51,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 14:39:51,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 14:39:51,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 14:39:51,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-04 14:39:51,218 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 84 [2018-10-04 14:39:51,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:51,218 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-04 14:39:51,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 14:39:51,218 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-04 14:39:51,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 14:39:51,219 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:51,219 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-10-04 14:39:51,219 INFO L423 AbstractCegarLoop]: === Iteration 120 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:51,219 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:51,219 INFO L82 PathProgramCache]: Analyzing trace with hash -86651705, now seen corresponding path program 117 times [2018-10-04 14:39:51,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:51,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:51,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:51,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:51,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:51,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:51,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:51,761 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:39:51,820 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-04 14:39:51,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:51,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:51,977 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:51,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 14:39:51,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 14:39:51,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 14:39:51,978 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:51,978 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 43 states. [2018-10-04 14:39:52,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:52,137 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-10-04 14:39:52,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 14:39:52,138 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-04 14:39:52,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:52,138 INFO L225 Difference]: With dead ends: 89 [2018-10-04 14:39:52,138 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 14:39:52,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 41 [2018-10-04 14:39:52,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 14:39:52,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-04 14:39:52,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 14:39:52,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2018-10-04 14:39:52,145 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 84 [2018-10-04 14:39:52,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:52,145 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2018-10-04 14:39:52,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 14:39:52,145 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2018-10-04 14:39:52,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-04 14:39:52,146 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:52,146 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1] [2018-10-04 14:39:52,146 INFO L423 AbstractCegarLoop]: === Iteration 121 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:52,146 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:52,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1608702919, now seen corresponding path program 118 times [2018-10-04 14:39:52,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:52,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:52,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:52,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:52,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:52,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:53,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:53,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:53,257 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:39:53,304 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:39:53,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:53,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:53,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:53,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 14:39:53,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 14:39:53,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 14:39:53,491 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:53,491 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 43 states. [2018-10-04 14:39:55,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:55,492 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2018-10-04 14:39:55,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 14:39:55,493 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 85 [2018-10-04 14:39:55,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:55,493 INFO L225 Difference]: With dead ends: 131 [2018-10-04 14:39:55,494 INFO L226 Difference]: Without dead ends: 128 [2018-10-04 14:39:55,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.8s impTime 41 [2018-10-04 14:39:55,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-04 14:39:55,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 88. [2018-10-04 14:39:55,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-04 14:39:55,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-10-04 14:39:55,501 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 85 [2018-10-04 14:39:55,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:55,501 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-10-04 14:39:55,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 14:39:55,501 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-10-04 14:39:55,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 14:39:55,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:55,502 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-10-04 14:39:55,502 INFO L423 AbstractCegarLoop]: === Iteration 122 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:55,502 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:55,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1669878585, now seen corresponding path program 119 times [2018-10-04 14:39:55,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:55,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:55,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:55,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:55,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:56,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:56,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:56,208 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:39:56,270 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 14:39:56,270 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:56,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:56,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:56,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 14:39:56,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 14:39:56,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 14:39:56,430 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:56,430 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 44 states. [2018-10-04 14:39:56,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:56,859 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-10-04 14:39:56,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 14:39:56,859 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-04 14:39:56,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:56,860 INFO L225 Difference]: With dead ends: 132 [2018-10-04 14:39:56,860 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 14:39:56,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 41 [2018-10-04 14:39:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 14:39:56,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-04 14:39:56,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 14:39:56,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-04 14:39:56,867 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 86 [2018-10-04 14:39:56,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:56,867 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-04 14:39:56,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 14:39:56,867 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-04 14:39:56,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 14:39:56,868 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:56,868 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-10-04 14:39:56,868 INFO L423 AbstractCegarLoop]: === Iteration 123 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:56,868 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:56,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1752850541, now seen corresponding path program 120 times [2018-10-04 14:39:56,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:56,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:56,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:56,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:56,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:57,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:57,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:57,333 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:39:57,392 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-04 14:39:57,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:57,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:57,565 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:57,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 14:39:57,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 14:39:57,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 14:39:57,566 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:57,566 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 44 states. [2018-10-04 14:39:57,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:57,692 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-10-04 14:39:57,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 14:39:57,696 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-04 14:39:57,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:57,696 INFO L225 Difference]: With dead ends: 91 [2018-10-04 14:39:57,696 INFO L226 Difference]: Without dead ends: 88 [2018-10-04 14:39:57,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 42 [2018-10-04 14:39:57,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-04 14:39:57,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-04 14:39:57,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-04 14:39:57,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2018-10-04 14:39:57,702 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 86 [2018-10-04 14:39:57,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:57,702 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2018-10-04 14:39:57,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 14:39:57,703 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2018-10-04 14:39:57,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-04 14:39:57,703 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:57,703 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1] [2018-10-04 14:39:57,703 INFO L423 AbstractCegarLoop]: === Iteration 124 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:57,704 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:57,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1496269599, now seen corresponding path program 121 times [2018-10-04 14:39:57,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:57,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:57,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:57,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:57,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:58,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:58,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:39:58,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:39:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:59,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:39:59,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:59,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 14:39:59,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 14:39:59,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 14:39:59,261 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:59,261 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 44 states. [2018-10-04 14:40:01,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:01,360 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-10-04 14:40:01,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 14:40:01,361 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 87 [2018-10-04 14:40:01,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:01,361 INFO L225 Difference]: With dead ends: 134 [2018-10-04 14:40:01,362 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 14:40:01,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.9s impTime 42 [2018-10-04 14:40:01,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 14:40:01,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 90. [2018-10-04 14:40:01,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-04 14:40:01,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2018-10-04 14:40:01,369 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 87 [2018-10-04 14:40:01,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:01,369 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2018-10-04 14:40:01,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 14:40:01,369 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2018-10-04 14:40:01,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 14:40:01,370 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:01,370 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-10-04 14:40:01,370 INFO L423 AbstractCegarLoop]: === Iteration 125 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:01,370 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:01,370 INFO L82 PathProgramCache]: Analyzing trace with hash 860221165, now seen corresponding path program 122 times [2018-10-04 14:40:01,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:01,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:01,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:01,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:40:01,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:02,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:02,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:02,024 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:40:02,076 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:40:02,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:02,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:02,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:02,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 14:40:02,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 14:40:02,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 14:40:02,309 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:02,309 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 45 states. [2018-10-04 14:40:02,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:02,710 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2018-10-04 14:40:02,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 14:40:02,711 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-04 14:40:02,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:02,711 INFO L225 Difference]: With dead ends: 135 [2018-10-04 14:40:02,711 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 14:40:02,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 42 [2018-10-04 14:40:02,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 14:40:02,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-04 14:40:02,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-04 14:40:02,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-10-04 14:40:02,717 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 88 [2018-10-04 14:40:02,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:02,717 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-10-04 14:40:02,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 14:40:02,717 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-10-04 14:40:02,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 14:40:02,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:02,718 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-10-04 14:40:02,718 INFO L423 AbstractCegarLoop]: === Iteration 126 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:02,718 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:02,718 INFO L82 PathProgramCache]: Analyzing trace with hash -409358329, now seen corresponding path program 123 times [2018-10-04 14:40:02,718 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:02,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:02,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:02,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:02,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:03,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:03,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:03,277 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:40:03,336 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-04 14:40:03,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:03,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:03,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:03,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:03,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 14:40:03,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 14:40:03,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 14:40:03,506 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:03,507 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 45 states. [2018-10-04 14:40:03,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:03,635 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-10-04 14:40:03,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 14:40:03,635 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-04 14:40:03,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:03,636 INFO L225 Difference]: With dead ends: 93 [2018-10-04 14:40:03,636 INFO L226 Difference]: Without dead ends: 90 [2018-10-04 14:40:03,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 43 [2018-10-04 14:40:03,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-04 14:40:03,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-04 14:40:03,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-04 14:40:03,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-10-04 14:40:03,642 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 88 [2018-10-04 14:40:03,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:03,643 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-10-04 14:40:03,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 14:40:03,643 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-10-04 14:40:03,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-04 14:40:03,643 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:03,643 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1] [2018-10-04 14:40:03,644 INFO L423 AbstractCegarLoop]: === Iteration 127 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:03,644 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:03,644 INFO L82 PathProgramCache]: Analyzing trace with hash 194732167, now seen corresponding path program 124 times [2018-10-04 14:40:03,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:03,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:03,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:03,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:03,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:04,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:04,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:04,845 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:40:04,899 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:40:04,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:04,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:05,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:05,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 14:40:05,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 14:40:05,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 14:40:05,089 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:05,089 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 45 states. [2018-10-04 14:40:07,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:07,336 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2018-10-04 14:40:07,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 14:40:07,337 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 89 [2018-10-04 14:40:07,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:07,338 INFO L225 Difference]: With dead ends: 137 [2018-10-04 14:40:07,338 INFO L226 Difference]: Without dead ends: 134 [2018-10-04 14:40:07,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime 43 [2018-10-04 14:40:07,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-04 14:40:07,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 92. [2018-10-04 14:40:07,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-04 14:40:07,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-10-04 14:40:07,344 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2018-10-04 14:40:07,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:07,344 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-10-04 14:40:07,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 14:40:07,344 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-10-04 14:40:07,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 14:40:07,344 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:07,344 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-10-04 14:40:07,345 INFO L423 AbstractCegarLoop]: === Iteration 128 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:07,345 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:07,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1741668359, now seen corresponding path program 125 times [2018-10-04 14:40:07,345 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:07,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:07,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:07,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:07,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:07,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:07,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:07,902 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:07,909 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:40:07,980 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-10-04 14:40:07,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:07,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:08,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:08,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:08,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 14:40:08,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 14:40:08,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 14:40:08,152 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:08,152 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 46 states. [2018-10-04 14:40:08,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:08,497 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2018-10-04 14:40:08,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 14:40:08,497 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-04 14:40:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:08,498 INFO L225 Difference]: With dead ends: 138 [2018-10-04 14:40:08,498 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 14:40:08,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 43 [2018-10-04 14:40:08,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 14:40:08,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 14:40:08,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 14:40:08,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-04 14:40:08,505 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 90 [2018-10-04 14:40:08,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:08,505 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-04 14:40:08,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 14:40:08,505 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-04 14:40:08,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 14:40:08,506 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:08,506 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-10-04 14:40:08,506 INFO L423 AbstractCegarLoop]: === Iteration 129 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:08,506 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:08,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1039409709, now seen corresponding path program 126 times [2018-10-04 14:40:08,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:08,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:08,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:08,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:08,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:09,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:09,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:09,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:09,054 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:40:09,117 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-10-04 14:40:09,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:09,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:09,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:09,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:09,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 14:40:09,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 14:40:09,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 14:40:09,285 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:09,285 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 46 states. [2018-10-04 14:40:09,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:09,418 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2018-10-04 14:40:09,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 14:40:09,419 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-04 14:40:09,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:09,419 INFO L225 Difference]: With dead ends: 95 [2018-10-04 14:40:09,419 INFO L226 Difference]: Without dead ends: 92 [2018-10-04 14:40:09,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 44 [2018-10-04 14:40:09,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-04 14:40:09,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-04 14:40:09,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-04 14:40:09,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2018-10-04 14:40:09,424 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 90 [2018-10-04 14:40:09,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:09,424 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2018-10-04 14:40:09,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 14:40:09,425 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2018-10-04 14:40:09,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-04 14:40:09,425 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:09,425 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1] [2018-10-04 14:40:09,425 INFO L423 AbstractCegarLoop]: === Iteration 130 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:09,425 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:09,426 INFO L82 PathProgramCache]: Analyzing trace with hash -2138098911, now seen corresponding path program 127 times [2018-10-04 14:40:09,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:09,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:09,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:09,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:09,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:10,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:10,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:10,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:10,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:40:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:10,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:10,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:10,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 14:40:10,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 14:40:10,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 14:40:10,978 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:10,978 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 46 states. [2018-10-04 14:40:13,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:13,269 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-10-04 14:40:13,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 14:40:13,269 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 91 [2018-10-04 14:40:13,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:13,270 INFO L225 Difference]: With dead ends: 140 [2018-10-04 14:40:13,270 INFO L226 Difference]: Without dead ends: 137 [2018-10-04 14:40:13,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime 44 [2018-10-04 14:40:13,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-04 14:40:13,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 94. [2018-10-04 14:40:13,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 14:40:13,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-10-04 14:40:13,276 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 91 [2018-10-04 14:40:13,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:13,276 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-10-04 14:40:13,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 14:40:13,276 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-10-04 14:40:13,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 14:40:13,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:13,277 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-10-04 14:40:13,277 INFO L423 AbstractCegarLoop]: === Iteration 131 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:13,277 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:13,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1856618323, now seen corresponding path program 128 times [2018-10-04 14:40:13,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:13,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:13,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:13,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:40:13,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:14,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:14,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:14,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:14,177 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:40:14,227 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:40:14,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:14,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:14,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:14,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 14:40:14,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 14:40:14,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 14:40:14,399 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:14,400 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 47 states. [2018-10-04 14:40:15,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:15,009 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2018-10-04 14:40:15,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 14:40:15,009 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-04 14:40:15,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:15,010 INFO L225 Difference]: With dead ends: 141 [2018-10-04 14:40:15,010 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 14:40:15,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime 44 [2018-10-04 14:40:15,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 14:40:15,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-04 14:40:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-04 14:40:15,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-10-04 14:40:15,017 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 92 [2018-10-04 14:40:15,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:15,017 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-10-04 14:40:15,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 14:40:15,017 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-10-04 14:40:15,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 14:40:15,017 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:15,018 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-10-04 14:40:15,018 INFO L423 AbstractCegarLoop]: === Iteration 132 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:15,018 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:15,018 INFO L82 PathProgramCache]: Analyzing trace with hash 2143167303, now seen corresponding path program 129 times [2018-10-04 14:40:15,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:15,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:15,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:15,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:15,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:15,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:15,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:15,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:15,640 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:40:15,703 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-10-04 14:40:15,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:15,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:15,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:15,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 14:40:15,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 14:40:15,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 14:40:15,878 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:15,878 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 47 states. [2018-10-04 14:40:16,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:16,014 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-04 14:40:16,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 14:40:16,014 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-04 14:40:16,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:16,015 INFO L225 Difference]: With dead ends: 97 [2018-10-04 14:40:16,015 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 14:40:16,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 45 [2018-10-04 14:40:16,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 14:40:16,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-04 14:40:16,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 14:40:16,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-10-04 14:40:16,022 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 92 [2018-10-04 14:40:16,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:16,022 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-10-04 14:40:16,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 14:40:16,022 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-10-04 14:40:16,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-04 14:40:16,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:16,023 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1] [2018-10-04 14:40:16,023 INFO L423 AbstractCegarLoop]: === Iteration 133 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:16,023 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:16,023 INFO L82 PathProgramCache]: Analyzing trace with hash 2013615431, now seen corresponding path program 130 times [2018-10-04 14:40:16,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:16,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:16,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:16,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:16,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:17,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:17,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:17,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:17,313 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:40:17,367 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:40:17,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:17,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:17,553 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:17,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 14:40:17,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 14:40:17,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 14:40:17,554 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:17,554 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 47 states. [2018-10-04 14:40:19,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:19,970 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2018-10-04 14:40:19,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 14:40:19,971 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 93 [2018-10-04 14:40:19,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:19,971 INFO L225 Difference]: With dead ends: 143 [2018-10-04 14:40:19,971 INFO L226 Difference]: Without dead ends: 140 [2018-10-04 14:40:19,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime 45 [2018-10-04 14:40:19,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-04 14:40:19,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 96. [2018-10-04 14:40:19,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-04 14:40:19,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2018-10-04 14:40:19,978 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 93 [2018-10-04 14:40:19,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:19,978 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2018-10-04 14:40:19,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 14:40:19,978 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2018-10-04 14:40:19,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 14:40:19,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:19,978 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-10-04 14:40:19,979 INFO L423 AbstractCegarLoop]: === Iteration 134 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:19,979 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:19,979 INFO L82 PathProgramCache]: Analyzing trace with hash -2002492601, now seen corresponding path program 131 times [2018-10-04 14:40:19,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:19,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:19,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:19,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:19,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:20,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:20,599 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:20,606 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:40:20,679 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-04 14:40:20,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:20,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:20,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:20,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:20,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 14:40:20,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 14:40:20,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 14:40:20,861 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:20,861 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 48 states. [2018-10-04 14:40:21,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:21,238 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2018-10-04 14:40:21,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 14:40:21,239 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-04 14:40:21,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:21,239 INFO L225 Difference]: With dead ends: 144 [2018-10-04 14:40:21,239 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 14:40:21,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 45 [2018-10-04 14:40:21,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 14:40:21,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-04 14:40:21,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 14:40:21,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-10-04 14:40:21,246 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 94 [2018-10-04 14:40:21,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:21,246 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-10-04 14:40:21,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 14:40:21,246 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-10-04 14:40:21,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 14:40:21,247 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:21,247 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-10-04 14:40:21,247 INFO L423 AbstractCegarLoop]: === Iteration 135 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:21,247 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:21,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1731777517, now seen corresponding path program 132 times [2018-10-04 14:40:21,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:21,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:21,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:21,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:21,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:21,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:21,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:21,710 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:40:21,775 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-10-04 14:40:21,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:21,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:21,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:21,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:21,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 14:40:21,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 14:40:21,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 14:40:21,975 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:21,975 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 48 states. [2018-10-04 14:40:22,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:22,137 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2018-10-04 14:40:22,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 14:40:22,137 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-04 14:40:22,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:22,138 INFO L225 Difference]: With dead ends: 99 [2018-10-04 14:40:22,138 INFO L226 Difference]: Without dead ends: 96 [2018-10-04 14:40:22,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 46 [2018-10-04 14:40:22,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-04 14:40:22,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-04 14:40:22,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-04 14:40:22,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2018-10-04 14:40:22,144 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 94 [2018-10-04 14:40:22,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:22,144 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2018-10-04 14:40:22,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 14:40:22,144 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2018-10-04 14:40:22,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-04 14:40:22,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:22,144 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1] [2018-10-04 14:40:22,144 INFO L423 AbstractCegarLoop]: === Iteration 136 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:22,145 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:22,145 INFO L82 PathProgramCache]: Analyzing trace with hash 2145433953, now seen corresponding path program 133 times [2018-10-04 14:40:22,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:22,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:22,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:22,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:22,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:23,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:23,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:23,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:23,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:40:23,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:23,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:23,732 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:23,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 14:40:23,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 14:40:23,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 14:40:23,733 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:23,733 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 48 states. [2018-10-04 14:40:26,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:26,246 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-10-04 14:40:26,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 14:40:26,246 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 95 [2018-10-04 14:40:26,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:26,247 INFO L225 Difference]: With dead ends: 146 [2018-10-04 14:40:26,247 INFO L226 Difference]: Without dead ends: 143 [2018-10-04 14:40:26,247 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.1s impTime 46 [2018-10-04 14:40:26,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-04 14:40:26,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 98. [2018-10-04 14:40:26,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-04 14:40:26,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2018-10-04 14:40:26,254 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 95 [2018-10-04 14:40:26,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:26,254 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2018-10-04 14:40:26,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 14:40:26,254 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2018-10-04 14:40:26,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 14:40:26,254 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:26,254 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-10-04 14:40:26,254 INFO L423 AbstractCegarLoop]: === Iteration 137 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:26,255 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:26,255 INFO L82 PathProgramCache]: Analyzing trace with hash 2083881581, now seen corresponding path program 134 times [2018-10-04 14:40:26,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:26,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:26,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:26,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:40:26,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:26,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:26,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:26,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:26,960 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:40:27,014 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:40:27,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:27,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:27,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:27,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:27,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 14:40:27,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 14:40:27,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 14:40:27,190 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:27,191 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 49 states. [2018-10-04 14:40:27,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:27,642 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2018-10-04 14:40:27,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 14:40:27,642 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-04 14:40:27,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:27,643 INFO L225 Difference]: With dead ends: 147 [2018-10-04 14:40:27,643 INFO L226 Difference]: Without dead ends: 97 [2018-10-04 14:40:27,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 46 [2018-10-04 14:40:27,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-04 14:40:27,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-04 14:40:27,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-04 14:40:27,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-10-04 14:40:27,649 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 96 [2018-10-04 14:40:27,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:27,649 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-10-04 14:40:27,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 14:40:27,649 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-10-04 14:40:27,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 14:40:27,649 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:27,649 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-10-04 14:40:27,649 INFO L423 AbstractCegarLoop]: === Iteration 138 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:27,649 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:27,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1882138247, now seen corresponding path program 135 times [2018-10-04 14:40:27,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:27,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:27,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:27,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:27,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:28,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:28,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:28,251 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:40:28,322 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 14:40:28,322 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:28,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:28,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:28,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 14:40:28,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 14:40:28,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 14:40:28,507 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:28,507 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 49 states. [2018-10-04 14:40:28,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:28,653 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-10-04 14:40:28,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 14:40:28,653 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-04 14:40:28,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:28,653 INFO L225 Difference]: With dead ends: 101 [2018-10-04 14:40:28,654 INFO L226 Difference]: Without dead ends: 98 [2018-10-04 14:40:28,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 47 [2018-10-04 14:40:28,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-04 14:40:28,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-04 14:40:28,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-04 14:40:28,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2018-10-04 14:40:28,660 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 96 [2018-10-04 14:40:28,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:28,660 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2018-10-04 14:40:28,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 14:40:28,660 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2018-10-04 14:40:28,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-04 14:40:28,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:28,660 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1] [2018-10-04 14:40:28,661 INFO L423 AbstractCegarLoop]: === Iteration 139 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:28,661 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:28,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1783318009, now seen corresponding path program 136 times [2018-10-04 14:40:28,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:28,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:28,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:28,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:28,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:28,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:30,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:30,055 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:30,062 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:40:30,119 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:40:30,119 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:30,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:30,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:30,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 14:40:30,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 14:40:30,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 14:40:30,322 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:30,322 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 49 states. [2018-10-04 14:40:32,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:32,944 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2018-10-04 14:40:32,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 14:40:32,945 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 97 [2018-10-04 14:40:32,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:32,945 INFO L225 Difference]: With dead ends: 149 [2018-10-04 14:40:32,945 INFO L226 Difference]: Without dead ends: 146 [2018-10-04 14:40:32,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.1s impTime 47 [2018-10-04 14:40:32,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-04 14:40:32,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2018-10-04 14:40:32,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 14:40:32,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-10-04 14:40:32,952 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 97 [2018-10-04 14:40:32,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:32,952 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-10-04 14:40:32,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 14:40:32,953 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-10-04 14:40:32,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 14:40:32,953 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:32,953 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-10-04 14:40:32,953 INFO L423 AbstractCegarLoop]: === Iteration 140 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:32,953 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:32,953 INFO L82 PathProgramCache]: Analyzing trace with hash 551655047, now seen corresponding path program 137 times [2018-10-04 14:40:32,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:32,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:32,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:32,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:32,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:33,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:33,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:33,720 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:40:33,798 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 14:40:33,798 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:33,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:34,034 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:34,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 14:40:34,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 14:40:34,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 14:40:34,035 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:34,035 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 50 states. [2018-10-04 14:40:34,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:34,499 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2018-10-04 14:40:34,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 14:40:34,499 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-04 14:40:34,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:34,500 INFO L225 Difference]: With dead ends: 150 [2018-10-04 14:40:34,500 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 14:40:34,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 47 [2018-10-04 14:40:34,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 14:40:34,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-04 14:40:34,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 14:40:34,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-04 14:40:34,507 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 98 [2018-10-04 14:40:34,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:34,507 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-04 14:40:34,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 14:40:34,507 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-04 14:40:34,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 14:40:34,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:34,507 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-10-04 14:40:34,508 INFO L423 AbstractCegarLoop]: === Iteration 141 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:34,508 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:34,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1407421011, now seen corresponding path program 138 times [2018-10-04 14:40:34,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:34,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:34,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:34,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:34,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:34,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:34,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:34,974 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:40:35,045 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 14:40:35,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:35,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:35,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:35,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:35,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 14:40:35,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 14:40:35,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 14:40:35,236 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:35,236 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 50 states. [2018-10-04 14:40:35,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:35,421 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2018-10-04 14:40:35,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 14:40:35,422 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-04 14:40:35,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:35,422 INFO L225 Difference]: With dead ends: 103 [2018-10-04 14:40:35,422 INFO L226 Difference]: Without dead ends: 100 [2018-10-04 14:40:35,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 48 [2018-10-04 14:40:35,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-04 14:40:35,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-04 14:40:35,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 14:40:35,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2018-10-04 14:40:35,429 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 98 [2018-10-04 14:40:35,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:35,430 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2018-10-04 14:40:35,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 14:40:35,430 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2018-10-04 14:40:35,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-04 14:40:35,430 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:35,430 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1] [2018-10-04 14:40:35,430 INFO L423 AbstractCegarLoop]: === Iteration 142 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:35,431 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:35,431 INFO L82 PathProgramCache]: Analyzing trace with hash -680439903, now seen corresponding path program 139 times [2018-10-04 14:40:35,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:35,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:35,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:35,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:35,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:36,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:36,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:36,869 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:36,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:40:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:36,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:37,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:37,143 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:37,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 14:40:37,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 14:40:37,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 14:40:37,144 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:37,144 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 50 states. [2018-10-04 14:40:39,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:39,870 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-10-04 14:40:39,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 14:40:39,871 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 99 [2018-10-04 14:40:39,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:39,871 INFO L225 Difference]: With dead ends: 152 [2018-10-04 14:40:39,871 INFO L226 Difference]: Without dead ends: 149 [2018-10-04 14:40:39,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime 48 [2018-10-04 14:40:39,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-04 14:40:39,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 102. [2018-10-04 14:40:39,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-04 14:40:39,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2018-10-04 14:40:39,878 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 99 [2018-10-04 14:40:39,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:39,878 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2018-10-04 14:40:39,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 14:40:39,878 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2018-10-04 14:40:39,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 14:40:39,879 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:39,879 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-10-04 14:40:39,879 INFO L423 AbstractCegarLoop]: === Iteration 143 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:39,879 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:39,879 INFO L82 PathProgramCache]: Analyzing trace with hash 381137965, now seen corresponding path program 140 times [2018-10-04 14:40:39,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:39,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:39,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:39,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:40:39,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:40,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:40,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:40,598 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:40:40,655 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:40:40,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:40,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:40,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:40,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 14:40:40,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 14:40:40,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 14:40:40,841 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:40,841 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 51 states. [2018-10-04 14:40:41,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:41,265 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2018-10-04 14:40:41,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 14:40:41,265 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-04 14:40:41,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:41,266 INFO L225 Difference]: With dead ends: 153 [2018-10-04 14:40:41,266 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 14:40:41,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 48 [2018-10-04 14:40:41,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 14:40:41,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 14:40:41,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 14:40:41,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-10-04 14:40:41,274 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 100 [2018-10-04 14:40:41,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:41,274 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-10-04 14:40:41,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 14:40:41,274 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-10-04 14:40:41,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 14:40:41,275 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:41,275 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-10-04 14:40:41,275 INFO L423 AbstractCegarLoop]: === Iteration 144 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:41,275 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:41,275 INFO L82 PathProgramCache]: Analyzing trace with hash -220677689, now seen corresponding path program 141 times [2018-10-04 14:40:41,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:41,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:41,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:41,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:41,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:41,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:41,744 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:41,751 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:40:41,825 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-04 14:40:41,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:41,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:42,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:42,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 14:40:42,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 14:40:42,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 14:40:42,023 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:42,023 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 51 states. [2018-10-04 14:40:42,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:42,189 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-10-04 14:40:42,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 14:40:42,189 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-04 14:40:42,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:42,190 INFO L225 Difference]: With dead ends: 105 [2018-10-04 14:40:42,190 INFO L226 Difference]: Without dead ends: 102 [2018-10-04 14:40:42,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 49 [2018-10-04 14:40:42,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-04 14:40:42,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-04 14:40:42,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-04 14:40:42,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-10-04 14:40:42,196 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 100 [2018-10-04 14:40:42,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:42,196 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-10-04 14:40:42,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 14:40:42,196 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-10-04 14:40:42,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-04 14:40:42,196 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:42,196 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1] [2018-10-04 14:40:42,196 INFO L423 AbstractCegarLoop]: === Iteration 145 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:42,197 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:42,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1748864711, now seen corresponding path program 142 times [2018-10-04 14:40:42,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:42,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:42,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:42,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:42,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:43,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:43,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:43,801 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:43,809 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:40:43,867 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:40:43,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:43,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:44,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:44,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 14:40:44,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 14:40:44,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 14:40:44,069 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:44,069 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 51 states. [2018-10-04 14:40:46,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:46,910 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2018-10-04 14:40:46,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 14:40:46,910 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 101 [2018-10-04 14:40:46,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:46,911 INFO L225 Difference]: With dead ends: 155 [2018-10-04 14:40:46,911 INFO L226 Difference]: Without dead ends: 152 [2018-10-04 14:40:46,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.3s impTime 49 [2018-10-04 14:40:46,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-04 14:40:46,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 104. [2018-10-04 14:40:46,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-04 14:40:46,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-10-04 14:40:46,918 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2018-10-04 14:40:46,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:46,918 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-10-04 14:40:46,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 14:40:46,918 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-10-04 14:40:46,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 14:40:46,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:46,918 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-10-04 14:40:46,919 INFO L423 AbstractCegarLoop]: === Iteration 146 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:46,919 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:46,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1619830329, now seen corresponding path program 143 times [2018-10-04 14:40:46,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:46,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:46,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:46,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:46,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:47,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:47,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:47,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:47,618 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:40:47,701 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-04 14:40:47,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:47,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:47,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:47,879 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:47,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 14:40:47,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 14:40:47,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 14:40:47,879 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:47,879 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 52 states. [2018-10-04 14:40:48,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:48,318 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-10-04 14:40:48,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 14:40:48,319 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-04 14:40:48,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:48,319 INFO L225 Difference]: With dead ends: 156 [2018-10-04 14:40:48,319 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 14:40:48,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 49 [2018-10-04 14:40:48,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 14:40:48,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-04 14:40:48,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 14:40:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-10-04 14:40:48,326 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 102 [2018-10-04 14:40:48,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:48,326 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-10-04 14:40:48,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 14:40:48,326 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-10-04 14:40:48,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 14:40:48,327 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:48,327 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-10-04 14:40:48,327 INFO L423 AbstractCegarLoop]: === Iteration 147 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:48,327 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:48,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1198720877, now seen corresponding path program 144 times [2018-10-04 14:40:48,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:48,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:48,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:48,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:48,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:48,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:48,860 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:48,866 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:40:48,938 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-04 14:40:48,938 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:48,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:49,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:49,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 14:40:49,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 14:40:49,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 14:40:49,131 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:49,132 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 52 states. [2018-10-04 14:40:49,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:49,302 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2018-10-04 14:40:49,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 14:40:49,303 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-04 14:40:49,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:49,303 INFO L225 Difference]: With dead ends: 107 [2018-10-04 14:40:49,304 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 14:40:49,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.2s impTime 50 [2018-10-04 14:40:49,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 14:40:49,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-04 14:40:49,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-04 14:40:49,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2018-10-04 14:40:49,309 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 102 [2018-10-04 14:40:49,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:49,309 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2018-10-04 14:40:49,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 14:40:49,309 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2018-10-04 14:40:49,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-04 14:40:49,310 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:49,310 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1] [2018-10-04 14:40:49,310 INFO L423 AbstractCegarLoop]: === Iteration 148 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:49,310 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:49,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1494419999, now seen corresponding path program 145 times [2018-10-04 14:40:49,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:49,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:49,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:49,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:49,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:51,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:51,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:51,231 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:51,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:40:51,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:51,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:51,509 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:51,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 14:40:51,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 14:40:51,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 14:40:51,510 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:51,510 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 52 states. [2018-10-04 14:40:54,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:54,471 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-10-04 14:40:54,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 14:40:54,471 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 103 [2018-10-04 14:40:54,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:54,472 INFO L225 Difference]: With dead ends: 158 [2018-10-04 14:40:54,472 INFO L226 Difference]: Without dead ends: 155 [2018-10-04 14:40:54,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.5s impTime 50 [2018-10-04 14:40:54,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-04 14:40:54,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 106. [2018-10-04 14:40:54,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-04 14:40:54,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-10-04 14:40:54,478 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 103 [2018-10-04 14:40:54,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:54,478 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-10-04 14:40:54,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 14:40:54,479 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-10-04 14:40:54,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 14:40:54,479 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:54,479 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-10-04 14:40:54,479 INFO L423 AbstractCegarLoop]: === Iteration 149 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:54,479 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:54,479 INFO L82 PathProgramCache]: Analyzing trace with hash 917558765, now seen corresponding path program 146 times [2018-10-04 14:40:54,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:54,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:54,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:54,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:40:54,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:54,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:54,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:54,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:54,986 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:40:55,045 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:40:55,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:55,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:55,231 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:55,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 14:40:55,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 14:40:55,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 14:40:55,232 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:55,232 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 53 states. [2018-10-04 14:40:55,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:55,551 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2018-10-04 14:40:55,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 14:40:55,552 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-04 14:40:55,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:55,552 INFO L225 Difference]: With dead ends: 159 [2018-10-04 14:40:55,552 INFO L226 Difference]: Without dead ends: 105 [2018-10-04 14:40:55,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 50 [2018-10-04 14:40:55,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-04 14:40:55,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-04 14:40:55,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 14:40:55,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-10-04 14:40:55,559 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 104 [2018-10-04 14:40:55,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:55,560 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-10-04 14:40:55,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 14:40:55,560 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-10-04 14:40:55,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 14:40:55,560 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:55,560 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-10-04 14:40:55,560 INFO L423 AbstractCegarLoop]: === Iteration 150 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:55,560 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:55,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1901667065, now seen corresponding path program 147 times [2018-10-04 14:40:55,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:55,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:55,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:55,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:55,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:55,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:56,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:56,037 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:56,037 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:56,045 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:40:56,126 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2018-10-04 14:40:56,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:56,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:56,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:56,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 14:40:56,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 14:40:56,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 14:40:56,321 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:56,321 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 53 states. [2018-10-04 14:40:56,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:56,496 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-04 14:40:56,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 14:40:56,496 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-04 14:40:56,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:56,497 INFO L225 Difference]: With dead ends: 109 [2018-10-04 14:40:56,497 INFO L226 Difference]: Without dead ends: 106 [2018-10-04 14:40:56,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 51 [2018-10-04 14:40:56,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-04 14:40:56,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-04 14:40:56,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-04 14:40:56,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2018-10-04 14:40:56,504 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 104 [2018-10-04 14:40:56,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:56,504 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2018-10-04 14:40:56,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 14:40:56,504 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2018-10-04 14:40:56,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-04 14:40:56,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:56,504 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1] [2018-10-04 14:40:56,505 INFO L423 AbstractCegarLoop]: === Iteration 151 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:56,505 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:56,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1177801607, now seen corresponding path program 148 times [2018-10-04 14:40:56,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:56,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:56,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:56,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:56,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:58,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:58,145 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:40:58,153 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:40:58,215 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:40:58,216 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:58,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:58,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:40:58,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:58,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 14:40:58,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 14:40:58,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 14:40:58,431 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:58,431 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 53 states. [2018-10-04 14:41:01,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:01,540 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-10-04 14:41:01,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 14:41:01,540 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 105 [2018-10-04 14:41:01,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:01,541 INFO L225 Difference]: With dead ends: 161 [2018-10-04 14:41:01,541 INFO L226 Difference]: Without dead ends: 158 [2018-10-04 14:41:01,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.3s impTime 51 [2018-10-04 14:41:01,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-04 14:41:01,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 108. [2018-10-04 14:41:01,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-04 14:41:01,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-10-04 14:41:01,548 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 105 [2018-10-04 14:41:01,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:01,548 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-10-04 14:41:01,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 14:41:01,548 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-10-04 14:41:01,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 14:41:01,548 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:01,549 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-10-04 14:41:01,549 INFO L423 AbstractCegarLoop]: === Iteration 152 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:41:01,549 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:01,549 INFO L82 PathProgramCache]: Analyzing trace with hash -2142917369, now seen corresponding path program 149 times [2018-10-04 14:41:01,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:01,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:01,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:01,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:41:01,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:41:02,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:02,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:41:02,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:41:02,293 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:41:02,379 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2018-10-04 14:41:02,379 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:41:02,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:41:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:02,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:41:02,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 14:41:02,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 14:41:02,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 14:41:02,578 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:41:02,578 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 54 states. [2018-10-04 14:41:03,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:03,078 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2018-10-04 14:41:03,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 14:41:03,078 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-04 14:41:03,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:03,079 INFO L225 Difference]: With dead ends: 162 [2018-10-04 14:41:03,079 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 14:41:03,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 51 [2018-10-04 14:41:03,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 14:41:03,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-04 14:41:03,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-04 14:41:03,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-10-04 14:41:03,087 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 106 [2018-10-04 14:41:03,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:03,088 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-10-04 14:41:03,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 14:41:03,088 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-10-04 14:41:03,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 14:41:03,088 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:03,088 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-10-04 14:41:03,089 INFO L423 AbstractCegarLoop]: === Iteration 153 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:41:03,089 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:03,089 INFO L82 PathProgramCache]: Analyzing trace with hash 655395117, now seen corresponding path program 150 times [2018-10-04 14:41:03,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:03,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:03,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:03,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:41:03,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:41:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:03,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:41:03,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:41:03,532 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:41:03,610 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-10-04 14:41:03,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:41:03,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:41:03,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:03,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:41:03,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 14:41:03,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 14:41:03,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 14:41:03,809 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:41:03,810 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 54 states. [2018-10-04 14:41:03,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:03,989 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2018-10-04 14:41:03,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 14:41:03,989 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-04 14:41:03,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:03,990 INFO L225 Difference]: With dead ends: 111 [2018-10-04 14:41:03,990 INFO L226 Difference]: Without dead ends: 108 [2018-10-04 14:41:03,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 52 [2018-10-04 14:41:03,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-04 14:41:03,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-04 14:41:03,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-04 14:41:03,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2018-10-04 14:41:03,999 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 106 [2018-10-04 14:41:03,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:03,999 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2018-10-04 14:41:03,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 14:41:03,999 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2018-10-04 14:41:03,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 14:41:03,999 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:04,000 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1] [2018-10-04 14:41:04,000 INFO L423 AbstractCegarLoop]: === Iteration 154 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:41:04,000 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:04,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1157649375, now seen corresponding path program 151 times [2018-10-04 14:41:04,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:04,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:04,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:04,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:41:04,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:41:05,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:05,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:41:05,648 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:41:05,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:41:05,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:41:05,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:41:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:05,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:41:05,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 14:41:05,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 14:41:05,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 14:41:05,951 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:41:05,951 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 54 states. [2018-10-04 14:41:09,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:09,152 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-10-04 14:41:09,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 14:41:09,153 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 107 [2018-10-04 14:41:09,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:09,153 INFO L225 Difference]: With dead ends: 164 [2018-10-04 14:41:09,153 INFO L226 Difference]: Without dead ends: 161 [2018-10-04 14:41:09,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.3s impTime 52 [2018-10-04 14:41:09,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-04 14:41:09,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2018-10-04 14:41:09,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-04 14:41:09,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-10-04 14:41:09,161 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2018-10-04 14:41:09,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:09,161 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-10-04 14:41:09,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 14:41:09,161 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-10-04 14:41:09,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 14:41:09,161 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:09,162 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-10-04 14:41:09,162 INFO L423 AbstractCegarLoop]: === Iteration 155 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:41:09,162 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:09,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1527453779, now seen corresponding path program 152 times [2018-10-04 14:41:09,162 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:09,162 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:09,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:09,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:41:09,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:09,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:41:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:09,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:41:09,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:41:09,968 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:41:10,030 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:41:10,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:41:10,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:41:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:10,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:41:10,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 14:41:10,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 14:41:10,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 14:41:10,240 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:41:10,240 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 55 states. [2018-10-04 14:41:10,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:10,768 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2018-10-04 14:41:10,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 14:41:10,768 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-04 14:41:10,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:10,769 INFO L225 Difference]: With dead ends: 165 [2018-10-04 14:41:10,769 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 14:41:10,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 52 [2018-10-04 14:41:10,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 14:41:10,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-04 14:41:10,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-04 14:41:10,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-10-04 14:41:10,775 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 108 [2018-10-04 14:41:10,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:10,775 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-10-04 14:41:10,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 14:41:10,775 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-10-04 14:41:10,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 14:41:10,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:10,776 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-10-04 14:41:10,776 INFO L423 AbstractCegarLoop]: === Iteration 156 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:41:10,776 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:10,776 INFO L82 PathProgramCache]: Analyzing trace with hash -679112633, now seen corresponding path program 153 times [2018-10-04 14:41:10,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:10,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:10,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:10,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:41:10,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:41:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:11,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:41:11,297 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:41:11,303 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:41:11,386 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-04 14:41:11,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:41:11,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:41:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:11,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:41:11,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 14:41:11,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 14:41:11,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 14:41:11,594 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:41:11,594 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 55 states. [2018-10-04 14:41:11,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:11,771 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-10-04 14:41:11,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 14:41:11,771 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-04 14:41:11,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:11,772 INFO L225 Difference]: With dead ends: 113 [2018-10-04 14:41:11,772 INFO L226 Difference]: Without dead ends: 110 [2018-10-04 14:41:11,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 53 [2018-10-04 14:41:11,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-04 14:41:11,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-04 14:41:11,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-04 14:41:11,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2018-10-04 14:41:11,778 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 108 [2018-10-04 14:41:11,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:11,778 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2018-10-04 14:41:11,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 14:41:11,778 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2018-10-04 14:41:11,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-04 14:41:11,778 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:11,778 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1] [2018-10-04 14:41:11,778 INFO L423 AbstractCegarLoop]: === Iteration 157 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:41:11,778 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:11,779 INFO L82 PathProgramCache]: Analyzing trace with hash 422283335, now seen corresponding path program 154 times [2018-10-04 14:41:11,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:11,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:11,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:11,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:41:11,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:41:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:13,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:41:13,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:41:13,533 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:41:13,597 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:41:13,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:41:13,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:41:13,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:13,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:41:13,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 14:41:13,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 14:41:13,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 14:41:13,816 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:41:13,816 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 55 states. [2018-10-04 14:41:17,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:17,145 INFO L93 Difference]: Finished difference Result 167 states and 169 transitions. [2018-10-04 14:41:17,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 14:41:17,146 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 109 [2018-10-04 14:41:17,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:17,146 INFO L225 Difference]: With dead ends: 167 [2018-10-04 14:41:17,147 INFO L226 Difference]: Without dead ends: 164 [2018-10-04 14:41:17,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.4s impTime 53 [2018-10-04 14:41:17,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-04 14:41:17,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 112. [2018-10-04 14:41:17,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-04 14:41:17,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-10-04 14:41:17,154 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 109 [2018-10-04 14:41:17,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:17,154 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-10-04 14:41:17,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 14:41:17,154 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-10-04 14:41:17,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 14:41:17,154 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:17,154 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-10-04 14:41:17,155 INFO L423 AbstractCegarLoop]: === Iteration 158 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:41:17,155 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:17,155 INFO L82 PathProgramCache]: Analyzing trace with hash 205819975, now seen corresponding path program 155 times [2018-10-04 14:41:17,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:17,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:17,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:17,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:41:17,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:41:17,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:17,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:41:17,915 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:41:17,923 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:41:18,011 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 14:41:18,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:41:18,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:41:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:18,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:41:18,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 14:41:18,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 14:41:18,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 14:41:18,244 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:41:18,244 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 56 states. [2018-10-04 14:41:18,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:18,768 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2018-10-04 14:41:18,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 14:41:18,769 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-04 14:41:18,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:18,769 INFO L225 Difference]: With dead ends: 168 [2018-10-04 14:41:18,769 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 14:41:18,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 53 [2018-10-04 14:41:18,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 14:41:18,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-04 14:41:18,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-04 14:41:18,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-10-04 14:41:18,777 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 110 [2018-10-04 14:41:18,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:18,777 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-10-04 14:41:18,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 14:41:18,777 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-10-04 14:41:18,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 14:41:18,777 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:18,777 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-10-04 14:41:18,777 INFO L423 AbstractCegarLoop]: === Iteration 159 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:41:18,777 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:18,778 INFO L82 PathProgramCache]: Analyzing trace with hash 734591725, now seen corresponding path program 156 times [2018-10-04 14:41:18,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:18,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:18,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:18,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:41:18,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:18,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:41:19,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:19,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:41:19,277 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:41:19,284 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:41:19,368 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-04 14:41:19,369 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:41:19,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:41:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:19,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:41:19,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 14:41:19,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 14:41:19,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 14:41:19,586 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:41:19,586 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 56 states. [2018-10-04 14:41:19,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:19,790 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2018-10-04 14:41:19,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 14:41:19,790 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-04 14:41:19,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:19,791 INFO L225 Difference]: With dead ends: 115 [2018-10-04 14:41:19,791 INFO L226 Difference]: Without dead ends: 112 [2018-10-04 14:41:19,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 54 [2018-10-04 14:41:19,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-04 14:41:19,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-04 14:41:19,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-04 14:41:19,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2018-10-04 14:41:19,799 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 110 [2018-10-04 14:41:19,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:19,799 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2018-10-04 14:41:19,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 14:41:19,799 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2018-10-04 14:41:19,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-04 14:41:19,799 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:19,799 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1] [2018-10-04 14:41:19,799 INFO L423 AbstractCegarLoop]: === Iteration 160 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:41:19,800 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:19,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1297445473, now seen corresponding path program 157 times [2018-10-04 14:41:19,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:19,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:19,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:19,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:41:19,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:19,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:41:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:21,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:41:21,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:41:21,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:41:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:41:21,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:41:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:21,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:41:21,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 14:41:21,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 14:41:21,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 14:41:21,877 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:41:21,877 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 56 states. [2018-10-04 14:41:25,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:25,325 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-10-04 14:41:25,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 14:41:25,326 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 111 [2018-10-04 14:41:25,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:25,326 INFO L225 Difference]: With dead ends: 170 [2018-10-04 14:41:25,326 INFO L226 Difference]: Without dead ends: 167 [2018-10-04 14:41:25,327 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.5s impTime 54 [2018-10-04 14:41:25,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-04 14:41:25,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 114. [2018-10-04 14:41:25,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-04 14:41:25,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2018-10-04 14:41:25,334 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 111 [2018-10-04 14:41:25,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:25,334 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2018-10-04 14:41:25,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 14:41:25,335 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2018-10-04 14:41:25,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 14:41:25,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:25,335 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-10-04 14:41:25,335 INFO L423 AbstractCegarLoop]: === Iteration 161 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:41:25,335 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:25,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1566042477, now seen corresponding path program 158 times [2018-10-04 14:41:25,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:25,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:25,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:25,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:41:25,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:41:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:25,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:41:25,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:41:25,903 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:41:25,969 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:41:25,969 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:41:25,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:41:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:26,162 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:41:26,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 14:41:26,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 14:41:26,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 14:41:26,163 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:41:26,163 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 57 states. [2018-10-04 14:41:26,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:26,526 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2018-10-04 14:41:26,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 14:41:26,527 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-04 14:41:26,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:26,527 INFO L225 Difference]: With dead ends: 171 [2018-10-04 14:41:26,527 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 14:41:26,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 54 [2018-10-04 14:41:26,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 14:41:26,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-04 14:41:26,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-04 14:41:26,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-10-04 14:41:26,535 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 112 [2018-10-04 14:41:26,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:26,535 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-10-04 14:41:26,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 14:41:26,535 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-10-04 14:41:26,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 14:41:26,536 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:26,536 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-10-04 14:41:26,536 INFO L423 AbstractCegarLoop]: === Iteration 162 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:41:26,536 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:26,536 INFO L82 PathProgramCache]: Analyzing trace with hash 778097543, now seen corresponding path program 159 times [2018-10-04 14:41:26,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:26,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:26,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:26,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:41:26,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:41:26,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:26,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:41:26,980 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:41:26,986 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:41:27,074 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-04 14:41:27,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:41:27,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:41:27,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:27,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:41:27,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 14:41:27,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 14:41:27,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 14:41:27,288 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:41:27,288 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 57 states. [2018-10-04 14:41:27,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:27,522 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-10-04 14:41:27,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 14:41:27,522 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-04 14:41:27,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:27,523 INFO L225 Difference]: With dead ends: 117 [2018-10-04 14:41:27,523 INFO L226 Difference]: Without dead ends: 114 [2018-10-04 14:41:27,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 55 [2018-10-04 14:41:27,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-04 14:41:27,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-04 14:41:27,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-04 14:41:27,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-10-04 14:41:27,533 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 112 [2018-10-04 14:41:27,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:27,533 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-10-04 14:41:27,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 14:41:27,533 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-10-04 14:41:27,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-04 14:41:27,534 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:27,534 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1] [2018-10-04 14:41:27,534 INFO L423 AbstractCegarLoop]: === Iteration 163 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:41:27,534 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:27,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1648841465, now seen corresponding path program 160 times [2018-10-04 14:41:27,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:27,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:27,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:27,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:41:27,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:41:29,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:29,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:41:29,380 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:41:29,396 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:41:29,460 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:41:29,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:41:29,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:41:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:29,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:41:29,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 14:41:29,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 14:41:29,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 14:41:29,684 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:41:29,684 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 57 states. [2018-10-04 14:41:33,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:33,280 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2018-10-04 14:41:33,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 14:41:33,280 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 113 [2018-10-04 14:41:33,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:33,281 INFO L225 Difference]: With dead ends: 173 [2018-10-04 14:41:33,281 INFO L226 Difference]: Without dead ends: 170 [2018-10-04 14:41:33,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.5s impTime 55 [2018-10-04 14:41:33,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-04 14:41:33,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 116. [2018-10-04 14:41:33,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-04 14:41:33,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2018-10-04 14:41:33,290 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 113 [2018-10-04 14:41:33,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:33,291 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2018-10-04 14:41:33,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 14:41:33,291 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2018-10-04 14:41:33,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 14:41:33,291 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:33,291 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-10-04 14:41:33,292 INFO L423 AbstractCegarLoop]: === Iteration 164 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:41:33,292 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:33,292 INFO L82 PathProgramCache]: Analyzing trace with hash 425460615, now seen corresponding path program 161 times [2018-10-04 14:41:33,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:33,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:33,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:33,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:41:33,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:33,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:41:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:34,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:41:34,109 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:41:34,115 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:41:34,212 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2018-10-04 14:41:34,212 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:41:34,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:41:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:34,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:41:34,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 14:41:34,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 14:41:34,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 14:41:34,420 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:41:34,420 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 58 states. [2018-10-04 14:41:34,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:34,994 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2018-10-04 14:41:34,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 14:41:34,995 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-04 14:41:34,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:34,996 INFO L225 Difference]: With dead ends: 174 [2018-10-04 14:41:34,996 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 14:41:34,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 55 [2018-10-04 14:41:34,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 14:41:35,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-04 14:41:35,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 14:41:35,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-04 14:41:35,005 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 114 [2018-10-04 14:41:35,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:35,005 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-04 14:41:35,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 14:41:35,005 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-04 14:41:35,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 14:41:35,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:35,006 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-10-04 14:41:35,006 INFO L423 AbstractCegarLoop]: === Iteration 165 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:41:35,006 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:35,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1768971437, now seen corresponding path program 162 times [2018-10-04 14:41:35,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:35,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:35,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:35,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:41:35,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:35,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:41:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:35,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:41:35,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:41:35,599 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:41:35,684 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-10-04 14:41:35,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:41:35,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:41:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:35,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:41:35,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 14:41:35,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 14:41:35,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 14:41:35,893 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:41:35,894 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 58 states. [2018-10-04 14:41:36,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:36,119 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2018-10-04 14:41:36,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 14:41:36,120 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-04 14:41:36,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:36,120 INFO L225 Difference]: With dead ends: 119 [2018-10-04 14:41:36,120 INFO L226 Difference]: Without dead ends: 116 [2018-10-04 14:41:36,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 56 [2018-10-04 14:41:36,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-04 14:41:36,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-04 14:41:36,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-04 14:41:36,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2018-10-04 14:41:36,127 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 114 [2018-10-04 14:41:36,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:36,127 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2018-10-04 14:41:36,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 14:41:36,127 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2018-10-04 14:41:36,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-04 14:41:36,127 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:36,128 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1] [2018-10-04 14:41:36,128 INFO L423 AbstractCegarLoop]: === Iteration 166 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:41:36,128 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:36,128 INFO L82 PathProgramCache]: Analyzing trace with hash -996521823, now seen corresponding path program 163 times [2018-10-04 14:41:36,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:36,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:36,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:36,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:41:36,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:41:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:38,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:41:38,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:41:38,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:41:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:41:38,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:41:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:38,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:41:38,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 14:41:38,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 14:41:38,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 14:41:38,339 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:41:38,339 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 58 states. [2018-10-04 14:41:42,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:42,034 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-10-04 14:41:42,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 14:41:42,034 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 115 [2018-10-04 14:41:42,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:42,035 INFO L225 Difference]: With dead ends: 176 [2018-10-04 14:41:42,035 INFO L226 Difference]: Without dead ends: 173 [2018-10-04 14:41:42,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 167 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.6s impTime 56 [2018-10-04 14:41:42,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-04 14:41:42,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 118. [2018-10-04 14:41:42,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-04 14:41:42,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-10-04 14:41:42,043 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 115 [2018-10-04 14:41:42,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:42,043 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-10-04 14:41:42,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 14:41:42,043 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-10-04 14:41:42,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 14:41:42,043 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:42,043 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1] [2018-10-04 14:41:42,043 INFO L423 AbstractCegarLoop]: === Iteration 167 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:41:42,044 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:42,044 INFO L82 PathProgramCache]: Analyzing trace with hash -827466963, now seen corresponding path program 164 times [2018-10-04 14:41:42,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:42,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:42,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:42,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:41:42,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:41:42,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:42,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:41:42,627 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:41:42,634 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:41:42,700 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:41:42,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:41:42,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:41:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:42,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:41:42,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 14:41:42,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 14:41:42,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 14:41:42,903 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:41:42,903 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 59 states. [2018-10-04 14:41:43,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:43,287 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2018-10-04 14:41:43,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 14:41:43,287 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-04 14:41:43,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:43,288 INFO L225 Difference]: With dead ends: 177 [2018-10-04 14:41:43,288 INFO L226 Difference]: Without dead ends: 117 [2018-10-04 14:41:43,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 56 [2018-10-04 14:41:43,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-04 14:41:43,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-04 14:41:43,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-04 14:41:43,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-10-04 14:41:43,298 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 116 [2018-10-04 14:41:43,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:43,298 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-10-04 14:41:43,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 14:41:43,298 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-10-04 14:41:43,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 14:41:43,299 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:43,299 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1] [2018-10-04 14:41:43,299 INFO L423 AbstractCegarLoop]: === Iteration 168 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:41:43,299 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:43,299 INFO L82 PathProgramCache]: Analyzing trace with hash -2128304441, now seen corresponding path program 165 times [2018-10-04 14:41:43,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:43,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:43,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:43,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:41:43,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:41:43,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:43,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:41:43,770 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:41:43,776 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:41:43,871 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-10-04 14:41:43,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:41:43,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:41:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:44,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:41:44,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 14:41:44,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 14:41:44,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 14:41:44,086 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:41:44,087 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 59 states. [2018-10-04 14:41:44,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:44,305 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-10-04 14:41:44,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 14:41:44,306 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-04 14:41:44,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:44,306 INFO L225 Difference]: With dead ends: 121 [2018-10-04 14:41:44,306 INFO L226 Difference]: Without dead ends: 118 [2018-10-04 14:41:44,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 57 [2018-10-04 14:41:44,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-04 14:41:44,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-04 14:41:44,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-04 14:41:44,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-10-04 14:41:44,315 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 116 [2018-10-04 14:41:44,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:44,315 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-10-04 14:41:44,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 14:41:44,315 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-10-04 14:41:44,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-04 14:41:44,316 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:44,316 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1] [2018-10-04 14:41:44,316 INFO L423 AbstractCegarLoop]: === Iteration 169 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:41:44,316 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:44,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1552989753, now seen corresponding path program 166 times [2018-10-04 14:41:44,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:44,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:44,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:44,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:41:44,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:41:46,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:46,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:41:46,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:41:46,295 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:41:46,365 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:41:46,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:41:46,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:41:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:41:46,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:41:46,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 14:41:46,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 14:41:46,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 14:41:46,598 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:41:46,598 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 59 states. Received shutdown request... [2018-10-04 14:41:47,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 14:41:47,181 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 14:41:47,187 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 14:41:47,187 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 02:41:47 BoogieIcfgContainer [2018-10-04 14:41:47,187 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 14:41:47,188 INFO L168 Benchmark]: Toolchain (without parser) took 236749.05 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -191.4 MB). Free memory was 1.5 GB in the beginning and 909.2 MB in the end (delta: 544.4 MB). Peak memory consumption was 353.0 MB. Max. memory is 7.1 GB. [2018-10-04 14:41:47,189 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 14:41:47,190 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.89 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 14:41:47,190 INFO L168 Benchmark]: Boogie Preprocessor took 24.44 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 14:41:47,190 INFO L168 Benchmark]: RCFGBuilder took 313.43 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 14:41:47,191 INFO L168 Benchmark]: TraceAbstraction took 236365.49 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -191.4 MB). Free memory was 1.4 GB in the beginning and 909.2 MB in the end (delta: 523.2 MB). Peak memory consumption was 331.9 MB. Max. memory is 7.1 GB. [2018-10-04 14:41:47,193 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 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.89 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.44 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 313.43 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 236365.49 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -191.4 MB). Free memory was 1.4 GB in the beginning and 909.2 MB in the end (delta: 523.2 MB). Peak memory consumption was 331.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 24]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 24). Cancelled while BasicCegarLoop was constructing difference of abstraction (118states) and FLOYD_HOARE automaton (currently 20 states, 59 states before enhancement), while ReachableStatesComputation was computing reachable states (18 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 23]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 23). Cancelled while BasicCegarLoop was constructing difference of abstraction (118states) and FLOYD_HOARE automaton (currently 20 states, 59 states before enhancement), while ReachableStatesComputation was computing reachable states (18 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 2 error locations. TIMEOUT Result, 236.3s OverallTime, 169 OverallIterations, 56 TraceHistogramMax, 98.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 676 SDtfs, 1474 SDslu, 5979 SDs, 0 SdLazy, 152387 SolverSat, 1955 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 78.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19869 GetRequests, 14801 SyntacticMatches, 112 SemanticMatches, 4956 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 114.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=118occurred in iteration=166, 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: 0.8s AutomataMinimizationTime, 168 MinimizatonAttempts, 1540 StatesRemovedByMinimization, 55 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.9s SsaConstructionTime, 8.4s SatisfiabilityAnalysisTime, 121.0s InterpolantComputationTime, 20599 NumberOfCodeBlocks, 20599 NumberOfCodeBlocksAsserted, 1579 NumberOfCheckSat, 20264 ConstructedInterpolants, 0 QuantifiedInterpolants, 6820284 SizeOfPredicates, 110 NumberOfNonLiveVariables, 44571 ConjunctsInSsa, 13042 ConjunctsInUnsatCore, 335 InterpolantComputations, 3 PerfectInterpolantSequences, 123421/363885 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/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_14-41-47-203.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_14-41-47-203.csv Completed graceful shutdown