java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b2fde6a [2018-09-28 10:12:48,220 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 10:12:48,222 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 10:12:48,234 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 10:12:48,235 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 10:12:48,237 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 10:12:48,238 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 10:12:48,240 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 10:12:48,242 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 10:12:48,242 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 10:12:48,243 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-28 10:12:48,267 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-28 10:12:48,282 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 10:12:48,282 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 10:12:48,283 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 10:12:48,283 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 10:12:48,283 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 10:12:48,284 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 10:12:48,284 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 10:12:48,284 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 10:12:48,284 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 10:12:48,284 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 10:12:48,285 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 10:12:48,285 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 10:12:48,285 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 10:12:48,285 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 10:12:48,285 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 10:12:48,286 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 10:12:48,286 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 10:12:48,286 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 10:12:48,286 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 10:12:48,286 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 10:12:48,287 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 10:12:48,287 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 10:12:48,287 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:12:48,287 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 10:12:48,287 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 10:12:48,288 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 10:12:48,288 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 10:12:48,288 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 10:12:48,288 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 10:12:48,288 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 10:12:48,353 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 10:12:48,369 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 10:12:48,374 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 10:12:48,376 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 10:12:48,376 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 10:12:48,377 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl [2018-09-28 10:12:48,377 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl' [2018-09-28 10:12:48,428 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 10:12:48,431 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 10:12:48,432 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 10:12:48,432 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 10:12:48,432 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 10:12:48,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:12:48" (1/1) ... [2018-09-28 10:12:48,467 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:12:48" (1/1) ... [2018-09-28 10:12:48,472 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-28 10:12:48,472 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-28 10:12:48,473 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-28 10:12:48,475 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 10:12:48,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 10:12:48,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 10:12:48,476 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 10:12:48,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:12:48" (1/1) ... [2018-09-28 10:12:48,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:12:48" (1/1) ... [2018-09-28 10:12:48,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:12:48" (1/1) ... [2018-09-28 10:12:48,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:12:48" (1/1) ... [2018-09-28 10:12:48,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:12:48" (1/1) ... [2018-09-28 10:12:48,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:12:48" (1/1) ... [2018-09-28 10:12:48,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:12:48" (1/1) ... [2018-09-28 10:12:48,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 10:12:48,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 10:12:48,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 10:12:48,498 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 10:12:48,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:12:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:12:48,576 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-28 10:12:48,576 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-28 10:12:48,576 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-28 10:12:48,833 INFO L350 CfgBuilder]: Using library mode [2018-09-28 10:12:48,834 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:12:48 BoogieIcfgContainer [2018-09-28 10:12:48,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 10:12:48,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 10:12:48,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 10:12:48,839 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 10:12:48,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:12:48" (1/2) ... [2018-09-28 10:12:48,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f0cf6d3 and model type HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 10:12:48, skipping insertion in model container [2018-09-28 10:12:48,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:12:48" (2/2) ... [2018-09-28 10:12:48,842 INFO L112 eAbstractionObserver]: Analyzing ICFG HiddenEqualityWithBranches.bpl [2018-09-28 10:12:48,852 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 10:12:48,860 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-28 10:12:48,911 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 10:12:48,912 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 10:12:48,912 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 10:12:48,912 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 10:12:48,912 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 10:12:48,912 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 10:12:48,913 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 10:12:48,913 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 10:12:48,913 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 10:12:48,930 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-28 10:12:48,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-28 10:12:48,937 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:48,938 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-28 10:12:48,939 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:48,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:48,944 INFO L82 PathProgramCache]: Analyzing trace with hash 979, now seen corresponding path program 1 times [2018-09-28 10:12:48,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:48,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:48,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:48,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:48,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:49,095 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:12:49,095 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-28 10:12:49,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-28 10:12:49,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-28 10:12:49,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-28 10:12:49,115 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-28 10:12:49,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:49,190 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-09-28 10:12:49,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-28 10:12:49,192 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-28 10:12:49,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:49,206 INFO L225 Difference]: With dead ends: 17 [2018-09-28 10:12:49,207 INFO L226 Difference]: Without dead ends: 7 [2018-09-28 10:12:49,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-28 10:12:49,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-28 10:12:49,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-28 10:12:49,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-28 10:12:49,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2018-09-28 10:12:49,267 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 9 transitions. Word has length 2 [2018-09-28 10:12:49,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:49,267 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 9 transitions. [2018-09-28 10:12:49,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-28 10:12:49,267 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 9 transitions. [2018-09-28 10:12:49,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-28 10:12:49,268 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:49,268 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-28 10:12:49,268 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:49,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:49,269 INFO L82 PathProgramCache]: Analyzing trace with hash 28757385, now seen corresponding path program 1 times [2018-09-28 10:12:49,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:49,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:49,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:49,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:49,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:49,317 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:12:49,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-28 10:12:49,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-28 10:12:49,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-28 10:12:49,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-28 10:12:49,320 INFO L87 Difference]: Start difference. First operand 7 states and 9 transitions. Second operand 3 states. [2018-09-28 10:12:49,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:49,337 INFO L93 Difference]: Finished difference Result 12 states and 17 transitions. [2018-09-28 10:12:49,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-28 10:12:49,339 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-09-28 10:12:49,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:49,339 INFO L225 Difference]: With dead ends: 12 [2018-09-28 10:12:49,340 INFO L226 Difference]: Without dead ends: 8 [2018-09-28 10:12:49,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-28 10:12:49,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-28 10:12:49,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-28 10:12:49,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-28 10:12:49,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-28 10:12:49,350 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-09-28 10:12:49,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:49,350 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-28 10:12:49,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-28 10:12:49,354 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-28 10:12:49,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-28 10:12:49,354 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:49,354 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-28 10:12:49,355 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:49,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:49,355 INFO L82 PathProgramCache]: Analyzing trace with hash 28757447, now seen corresponding path program 1 times [2018-09-28 10:12:49,355 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:49,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:49,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:49,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:49,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:49,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:49,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:49,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:49,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:49,518 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:49,518 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-09-28 10:12:49,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-28 10:12:49,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-28 10:12:49,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-28 10:12:49,521 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 4 states. [2018-09-28 10:12:49,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:49,592 INFO L93 Difference]: Finished difference Result 14 states and 20 transitions. [2018-09-28 10:12:49,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:12:49,592 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-09-28 10:12:49,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:49,593 INFO L225 Difference]: With dead ends: 14 [2018-09-28 10:12:49,593 INFO L226 Difference]: Without dead ends: 10 [2018-09-28 10:12:49,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-28 10:12:49,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-28 10:12:49,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-28 10:12:49,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-28 10:12:49,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-09-28 10:12:49,597 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 5 [2018-09-28 10:12:49,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:49,597 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-09-28 10:12:49,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-28 10:12:49,597 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-09-28 10:12:49,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 10:12:49,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:49,598 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2018-09-28 10:12:49,598 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:49,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:49,599 INFO L82 PathProgramCache]: Analyzing trace with hash 2014203669, now seen corresponding path program 1 times [2018-09-28 10:12:49,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:49,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:49,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:49,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:49,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:49,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:49,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:49,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:49,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:49,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:49,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:49,716 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:49,716 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-28 10:12:49,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-28 10:12:49,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-28 10:12:49,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-28 10:12:49,717 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2018-09-28 10:12:49,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:49,747 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2018-09-28 10:12:49,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:12:49,747 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-28 10:12:49,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:49,748 INFO L225 Difference]: With dead ends: 15 [2018-09-28 10:12:49,748 INFO L226 Difference]: Without dead ends: 11 [2018-09-28 10:12:49,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-28 10:12:49,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-28 10:12:49,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-28 10:12:49,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-28 10:12:49,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2018-09-28 10:12:49,752 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2018-09-28 10:12:49,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:49,752 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2018-09-28 10:12:49,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-28 10:12:49,753 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2018-09-28 10:12:49,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 10:12:49,753 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:49,753 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1] [2018-09-28 10:12:49,754 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:49,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:49,754 INFO L82 PathProgramCache]: Analyzing trace with hash 2014203731, now seen corresponding path program 2 times [2018-09-28 10:12:49,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:49,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:49,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:49,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:49,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:49,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:49,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:49,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:49,830 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:12:49,864 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:12:49,864 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:49,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:49,892 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:49,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-28 10:12:49,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:12:49,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:12:49,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-28 10:12:49,894 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 5 states. [2018-09-28 10:12:49,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:49,965 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-09-28 10:12:49,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:12:49,965 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-28 10:12:49,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:49,966 INFO L225 Difference]: With dead ends: 17 [2018-09-28 10:12:49,966 INFO L226 Difference]: Without dead ends: 13 [2018-09-28 10:12:49,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-28 10:12:49,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-28 10:12:49,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-28 10:12:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-28 10:12:49,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2018-09-28 10:12:49,971 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2018-09-28 10:12:49,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:49,971 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2018-09-28 10:12:49,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:12:49,971 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2018-09-28 10:12:49,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:12:49,972 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:49,972 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1] [2018-09-28 10:12:49,972 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:49,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:49,973 INFO L82 PathProgramCache]: Analyzing trace with hash 154849801, now seen corresponding path program 2 times [2018-09-28 10:12:49,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:49,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:49,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:49,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:49,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:50,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:50,043 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:50,059 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:12:50,091 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:12:50,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:50,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:50,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:50,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 10:12:50,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:12:50,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:12:50,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-28 10:12:50,133 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 5 states. [2018-09-28 10:12:50,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:50,257 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2018-09-28 10:12:50,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:12:50,258 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-09-28 10:12:50,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:50,258 INFO L225 Difference]: With dead ends: 18 [2018-09-28 10:12:50,258 INFO L226 Difference]: Without dead ends: 14 [2018-09-28 10:12:50,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-28 10:12:50,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-28 10:12:50,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-28 10:12:50,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:12:50,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-28 10:12:50,262 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-09-28 10:12:50,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:50,263 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-28 10:12:50,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:12:50,263 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-28 10:12:50,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:12:50,264 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:50,264 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1] [2018-09-28 10:12:50,264 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:50,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:50,265 INFO L82 PathProgramCache]: Analyzing trace with hash 154849863, now seen corresponding path program 3 times [2018-09-28 10:12:50,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:50,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:50,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:50,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:50,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:50,381 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:50,381 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:50,391 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:12:50,402 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-28 10:12:50,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:50,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:50,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:50,438 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:50,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 10:12:50,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:12:50,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:12:50,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:12:50,440 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2018-09-28 10:12:50,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:50,481 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2018-09-28 10:12:50,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:12:50,481 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-09-28 10:12:50,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:50,482 INFO L225 Difference]: With dead ends: 20 [2018-09-28 10:12:50,483 INFO L226 Difference]: Without dead ends: 16 [2018-09-28 10:12:50,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:12:50,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-28 10:12:50,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-28 10:12:50,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:12:50,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-28 10:12:50,487 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2018-09-28 10:12:50,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:50,487 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-28 10:12:50,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:12:50,487 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-28 10:12:50,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 10:12:50,488 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:50,488 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1] [2018-09-28 10:12:50,489 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:50,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:50,489 INFO L82 PathProgramCache]: Analyzing trace with hash 336984725, now seen corresponding path program 3 times [2018-09-28 10:12:50,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:50,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:50,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:50,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:50,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:50,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:50,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:50,572 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:12:50,583 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-28 10:12:50,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:50,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:50,782 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:50,783 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-28 10:12:50,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:12:50,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:12:50,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:12:50,784 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 11 states. [2018-09-28 10:12:51,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:51,330 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2018-09-28 10:12:51,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:12:51,331 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-09-28 10:12:51,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:51,332 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:12:51,332 INFO L226 Difference]: Without dead ends: 19 [2018-09-28 10:12:51,333 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2018-09-28 10:12:51,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-28 10:12:51,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-28 10:12:51,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-28 10:12:51,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-09-28 10:12:51,337 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2018-09-28 10:12:51,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:51,337 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-09-28 10:12:51,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:12:51,337 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-09-28 10:12:51,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:12:51,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:51,338 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1] [2018-09-28 10:12:51,338 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:51,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:51,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1774810761, now seen corresponding path program 4 times [2018-09-28 10:12:51,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:51,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:51,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:51,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:51,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:51,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:51,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:51,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:51,460 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:12:51,474 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:12:51,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:51,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:51,505 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:51,505 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:12:51,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:12:51,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:12:51,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:12:51,506 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2018-09-28 10:12:51,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:51,539 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-09-28 10:12:51,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:12:51,540 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-09-28 10:12:51,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:51,540 INFO L225 Difference]: With dead ends: 24 [2018-09-28 10:12:51,540 INFO L226 Difference]: Without dead ends: 20 [2018-09-28 10:12:51,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:12:51,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-28 10:12:51,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-28 10:12:51,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:12:51,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-09-28 10:12:51,547 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-09-28 10:12:51,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:51,547 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-09-28 10:12:51,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:12:51,548 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-09-28 10:12:51,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:12:51,548 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:51,548 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1] [2018-09-28 10:12:51,549 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:51,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:51,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1774810823, now seen corresponding path program 4 times [2018-09-28 10:12:51,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:51,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:51,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:51,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:51,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:51,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:51,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:51,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:51,646 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:12:51,654 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:12:51,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:51,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:51,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:51,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:12:51,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:12:51,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:12:51,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:12:51,691 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2018-09-28 10:12:51,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:51,739 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2018-09-28 10:12:51,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:12:51,740 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-09-28 10:12:51,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:51,741 INFO L225 Difference]: With dead ends: 26 [2018-09-28 10:12:51,741 INFO L226 Difference]: Without dead ends: 22 [2018-09-28 10:12:51,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:12:51,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-28 10:12:51,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-28 10:12:51,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:12:51,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-09-28 10:12:51,746 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2018-09-28 10:12:51,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:51,747 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-09-28 10:12:51,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:12:51,747 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-09-28 10:12:51,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-28 10:12:51,748 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:51,748 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1] [2018-09-28 10:12:51,748 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:51,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:51,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1953561067, now seen corresponding path program 5 times [2018-09-28 10:12:51,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:51,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:51,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:51,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:51,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:51,921 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:51,922 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:51,931 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:12:51,944 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:12:51,945 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:51,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:51,979 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:51,979 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:12:51,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:12:51,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:12:51,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:12:51,980 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 8 states. [2018-09-28 10:12:52,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:52,036 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-09-28 10:12:52,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:12:52,037 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-09-28 10:12:52,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:52,037 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:12:52,038 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:12:52,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:12:52,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:12:52,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-28 10:12:52,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-28 10:12:52,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-09-28 10:12:52,043 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2018-09-28 10:12:52,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:52,043 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-09-28 10:12:52,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:12:52,043 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-09-28 10:12:52,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-28 10:12:52,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:52,044 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1] [2018-09-28 10:12:52,044 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:52,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:52,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1953561005, now seen corresponding path program 5 times [2018-09-28 10:12:52,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:52,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:52,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:52,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:52,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:52,167 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:52,167 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:52,176 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:12:52,202 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:12:52,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:52,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:52,211 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:52,236 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:52,236 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:12:52,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:12:52,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:12:52,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:12:52,237 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 9 states. [2018-09-28 10:12:52,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:52,283 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2018-09-28 10:12:52,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:12:52,283 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2018-09-28 10:12:52,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:52,284 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:12:52,284 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 10:12:52,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:12:52,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 10:12:52,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-28 10:12:52,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-28 10:12:52,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-09-28 10:12:52,290 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2018-09-28 10:12:52,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:52,290 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-09-28 10:12:52,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:12:52,291 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-09-28 10:12:52,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-28 10:12:52,291 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:52,291 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1] [2018-09-28 10:12:52,292 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:52,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:52,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1729447159, now seen corresponding path program 6 times [2018-09-28 10:12:52,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:52,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:52,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:52,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:52,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:52,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:52,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:52,414 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:52,422 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:12:52,439 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:12:52,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:52,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:52,608 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:52,629 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:52,630 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-28 10:12:52,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 10:12:52,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 10:12:52,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2018-09-28 10:12:52,631 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 17 states. [2018-09-28 10:12:53,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:53,032 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2018-09-28 10:12:53,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 10:12:53,033 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 23 [2018-09-28 10:12:53,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:53,036 INFO L225 Difference]: With dead ends: 32 [2018-09-28 10:12:53,036 INFO L226 Difference]: Without dead ends: 28 [2018-09-28 10:12:53,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2018-09-28 10:12:53,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-28 10:12:53,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-28 10:12:53,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:12:53,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-09-28 10:12:53,046 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-09-28 10:12:53,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:53,047 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-09-28 10:12:53,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 10:12:53,047 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-09-28 10:12:53,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-28 10:12:53,048 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:53,048 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1] [2018-09-28 10:12:53,048 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:53,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:53,049 INFO L82 PathProgramCache]: Analyzing trace with hash 468808085, now seen corresponding path program 7 times [2018-09-28 10:12:53,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:53,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:53,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:53,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:53,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:53,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:53,323 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:53,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:53,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:53,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:53,376 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:53,376 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:12:53,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:12:53,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:12:53,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:12:53,377 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 10 states. [2018-09-28 10:12:53,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:53,410 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-09-28 10:12:53,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:12:53,410 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2018-09-28 10:12:53,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:53,411 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:12:53,411 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:12:53,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:12:53,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:12:53,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-28 10:12:53,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-28 10:12:53,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-09-28 10:12:53,416 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2018-09-28 10:12:53,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:53,416 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-09-28 10:12:53,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:12:53,416 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-09-28 10:12:53,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-28 10:12:53,417 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:53,417 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1] [2018-09-28 10:12:53,418 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:53,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:53,418 INFO L82 PathProgramCache]: Analyzing trace with hash 468808147, now seen corresponding path program 6 times [2018-09-28 10:12:53,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:53,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:53,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:53,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:53,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:53,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:53,577 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:53,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:53,584 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:12:53,600 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:12:53,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:53,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:53,612 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:53,635 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:53,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:12:53,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:12:53,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:12:53,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:12:53,636 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 11 states. [2018-09-28 10:12:53,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:53,670 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-09-28 10:12:53,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:12:53,670 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2018-09-28 10:12:53,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:53,671 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:12:53,672 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:12:53,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:12:53,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:12:53,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-28 10:12:53,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-28 10:12:53,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-09-28 10:12:53,678 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2018-09-28 10:12:53,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:53,678 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-09-28 10:12:53,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:12:53,679 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-09-28 10:12:53,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-28 10:12:53,679 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:53,679 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1] [2018-09-28 10:12:53,680 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:53,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:53,680 INFO L82 PathProgramCache]: Analyzing trace with hash -970547319, now seen corresponding path program 8 times [2018-09-28 10:12:53,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:53,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:53,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:53,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:53,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:53,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:53,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-28 10:12:53,812 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:53,842 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:12:53,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:53,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:53,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:53,873 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:12:53,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:12:53,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:12:53,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:12:53,874 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 11 states. [2018-09-28 10:12:53,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:53,906 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2018-09-28 10:12:53,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:12:53,906 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-09-28 10:12:53,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:53,908 INFO L225 Difference]: With dead ends: 36 [2018-09-28 10:12:53,908 INFO L226 Difference]: Without dead ends: 32 [2018-09-28 10:12:53,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:12:53,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-28 10:12:53,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-28 10:12:53,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:12:53,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-09-28 10:12:53,913 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-09-28 10:12:53,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:53,914 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-09-28 10:12:53,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:12:53,914 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-09-28 10:12:53,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-28 10:12:53,915 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:53,915 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1] [2018-09-28 10:12:53,915 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:53,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:53,916 INFO L82 PathProgramCache]: Analyzing trace with hash -970547257, now seen corresponding path program 7 times [2018-09-28 10:12:53,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:53,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:53,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:53,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:53,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:53,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:54,075 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:54,075 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:54,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:54,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:54,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:54,132 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:54,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:54,154 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:12:54,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 10:12:54,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 10:12:54,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-28 10:12:54,155 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 12 states. [2018-09-28 10:12:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:54,215 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2018-09-28 10:12:54,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 10:12:54,216 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2018-09-28 10:12:54,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:54,216 INFO L225 Difference]: With dead ends: 38 [2018-09-28 10:12:54,216 INFO L226 Difference]: Without dead ends: 34 [2018-09-28 10:12:54,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-28 10:12:54,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-28 10:12:54,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-28 10:12:54,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:12:54,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-09-28 10:12:54,221 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2018-09-28 10:12:54,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:54,221 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-09-28 10:12:54,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 10:12:54,222 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-09-28 10:12:54,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-28 10:12:54,222 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:54,223 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1] [2018-09-28 10:12:54,223 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:54,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:54,223 INFO L82 PathProgramCache]: Analyzing trace with hash 146095381, now seen corresponding path program 9 times [2018-09-28 10:12:54,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:54,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:54,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:54,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:54,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:54,417 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:54,417 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:54,417 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:54,424 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:12:54,576 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-28 10:12:54,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:54,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:54,928 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:54,948 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:54,948 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-28 10:12:54,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-28 10:12:54,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-28 10:12:54,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2018-09-28 10:12:54,949 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 23 states. [2018-09-28 10:12:55,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:55,780 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2018-09-28 10:12:55,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 10:12:55,787 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2018-09-28 10:12:55,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:55,787 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:12:55,787 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:12:55,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=603, Invalid=1203, Unknown=0, NotChecked=0, Total=1806 [2018-09-28 10:12:55,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:12:55,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-28 10:12:55,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-28 10:12:55,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-09-28 10:12:55,793 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2018-09-28 10:12:55,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:55,794 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-09-28 10:12:55,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-28 10:12:55,794 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-09-28 10:12:55,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-28 10:12:55,795 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:55,795 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1] [2018-09-28 10:12:55,795 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:55,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:55,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1527063561, now seen corresponding path program 10 times [2018-09-28 10:12:55,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:55,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:55,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:55,796 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:55,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:55,971 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:55,971 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:55,982 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:12:55,995 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:12:55,995 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:55,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:56,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:56,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-28 10:12:56,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-28 10:12:56,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-28 10:12:56,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2018-09-28 10:12:56,222 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 25 states. [2018-09-28 10:12:56,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:56,631 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2018-09-28 10:12:56,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-28 10:12:56,631 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 35 [2018-09-28 10:12:56,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:56,632 INFO L225 Difference]: With dead ends: 44 [2018-09-28 10:12:56,632 INFO L226 Difference]: Without dead ends: 40 [2018-09-28 10:12:56,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=718, Invalid=1444, Unknown=0, NotChecked=0, Total=2162 [2018-09-28 10:12:56,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-28 10:12:56,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-28 10:12:56,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-28 10:12:56,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-09-28 10:12:56,638 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2018-09-28 10:12:56,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:56,639 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-09-28 10:12:56,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-28 10:12:56,639 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-09-28 10:12:56,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-28 10:12:56,640 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:56,640 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1] [2018-09-28 10:12:56,640 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:56,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:56,640 INFO L82 PathProgramCache]: Analyzing trace with hash 458385557, now seen corresponding path program 11 times [2018-09-28 10:12:56,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:56,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:56,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:56,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:56,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:56,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:56,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:56,805 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:12:56,824 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-28 10:12:56,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:56,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:56,836 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:56,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:56,867 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-28 10:12:56,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 10:12:56,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 10:12:56,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-28 10:12:56,868 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 14 states. [2018-09-28 10:12:56,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:56,971 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2018-09-28 10:12:56,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-28 10:12:56,976 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2018-09-28 10:12:56,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:56,977 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:12:56,977 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:12:56,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-28 10:12:56,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:12:56,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-28 10:12:56,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-28 10:12:56,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-09-28 10:12:56,981 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2018-09-28 10:12:56,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:56,982 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-09-28 10:12:56,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 10:12:56,982 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-09-28 10:12:56,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-28 10:12:56,983 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:56,983 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1] [2018-09-28 10:12:56,983 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:56,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:56,984 INFO L82 PathProgramCache]: Analyzing trace with hash 458385619, now seen corresponding path program 8 times [2018-09-28 10:12:56,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:56,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:56,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:56,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:56,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:57,172 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:57,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:57,181 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:12:57,197 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:12:57,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:57,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:57,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:57,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-28 10:12:57,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 10:12:57,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 10:12:57,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-28 10:12:57,230 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 15 states. [2018-09-28 10:12:57,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:57,294 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2018-09-28 10:12:57,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-28 10:12:57,294 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2018-09-28 10:12:57,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:57,295 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:12:57,295 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:12:57,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-28 10:12:57,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:12:57,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-28 10:12:57,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-28 10:12:57,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-09-28 10:12:57,301 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2018-09-28 10:12:57,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:57,301 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-09-28 10:12:57,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 10:12:57,301 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-09-28 10:12:57,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-28 10:12:57,302 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:57,302 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1] [2018-09-28 10:12:57,302 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:57,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:57,303 INFO L82 PathProgramCache]: Analyzing trace with hash 2064533641, now seen corresponding path program 12 times [2018-09-28 10:12:57,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:57,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:57,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:57,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:57,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:57,476 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:57,476 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:57,484 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:12:57,521 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-28 10:12:57,522 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:57,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:57,875 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:57,896 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:57,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-28 10:12:57,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-28 10:12:57,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-28 10:12:57,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2018-09-28 10:12:57,898 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 29 states. [2018-09-28 10:12:58,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:58,586 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2018-09-28 10:12:58,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 10:12:58,589 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 41 [2018-09-28 10:12:58,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:58,590 INFO L225 Difference]: With dead ends: 50 [2018-09-28 10:12:58,590 INFO L226 Difference]: Without dead ends: 46 [2018-09-28 10:12:58,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=978, Invalid=1992, Unknown=0, NotChecked=0, Total=2970 [2018-09-28 10:12:58,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-28 10:12:58,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-28 10:12:58,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-28 10:12:58,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-09-28 10:12:58,596 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2018-09-28 10:12:58,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:58,597 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-09-28 10:12:58,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-28 10:12:58,597 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-09-28 10:12:58,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-28 10:12:58,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:58,598 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1] [2018-09-28 10:12:58,598 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:58,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:58,598 INFO L82 PathProgramCache]: Analyzing trace with hash 591459349, now seen corresponding path program 13 times [2018-09-28 10:12:58,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:58,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:58,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:58,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:58,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:59,425 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:59,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:59,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:59,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:59,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:59,485 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:59,485 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-28 10:12:59,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 10:12:59,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 10:12:59,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-28 10:12:59,487 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2018-09-28 10:12:59,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:59,569 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2018-09-28 10:12:59,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 10:12:59,569 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-09-28 10:12:59,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:59,570 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:12:59,571 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:12:59,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-28 10:12:59,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:12:59,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-28 10:12:59,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-28 10:12:59,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2018-09-28 10:12:59,576 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2018-09-28 10:12:59,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:59,576 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2018-09-28 10:12:59,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 10:12:59,576 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2018-09-28 10:12:59,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-28 10:12:59,577 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:59,577 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1] [2018-09-28 10:12:59,577 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:59,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:59,577 INFO L82 PathProgramCache]: Analyzing trace with hash 591459411, now seen corresponding path program 9 times [2018-09-28 10:12:59,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:59,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:59,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:59,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:59,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:59,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:59,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:59,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:12:59,790 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:12:59,815 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-28 10:12:59,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:59,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:59,860 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:59,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-28 10:12:59,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 10:12:59,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 10:12:59,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-28 10:12:59,861 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 17 states. [2018-09-28 10:13:00,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:00,153 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2018-09-28 10:13:00,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 10:13:00,154 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2018-09-28 10:13:00,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:00,154 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:13:00,154 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:13:00,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-28 10:13:00,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:13:00,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-28 10:13:00,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-28 10:13:00,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-09-28 10:13:00,159 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2018-09-28 10:13:00,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:00,159 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-09-28 10:13:00,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 10:13:00,159 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-09-28 10:13:00,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-28 10:13:00,160 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:00,160 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1] [2018-09-28 10:13:00,160 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:00,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:00,160 INFO L82 PathProgramCache]: Analyzing trace with hash -2083910391, now seen corresponding path program 14 times [2018-09-28 10:13:00,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:00,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:00,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:00,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:00,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:00,339 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:00,339 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:00,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:00,346 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:13:00,361 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:13:00,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:00,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:00,372 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:00,393 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:00,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-28 10:13:00,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 10:13:00,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 10:13:00,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-28 10:13:00,394 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 17 states. [2018-09-28 10:13:00,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:00,433 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2018-09-28 10:13:00,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 10:13:00,434 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2018-09-28 10:13:00,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:00,434 INFO L225 Difference]: With dead ends: 54 [2018-09-28 10:13:00,434 INFO L226 Difference]: Without dead ends: 50 [2018-09-28 10:13:00,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-28 10:13:00,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-28 10:13:00,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-28 10:13:00,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-28 10:13:00,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-09-28 10:13:00,439 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-09-28 10:13:00,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:00,439 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-09-28 10:13:00,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 10:13:00,439 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-09-28 10:13:00,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-28 10:13:00,440 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:00,440 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1] [2018-09-28 10:13:00,441 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:00,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:00,442 INFO L82 PathProgramCache]: Analyzing trace with hash -2083910329, now seen corresponding path program 10 times [2018-09-28 10:13:00,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:00,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:00,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:00,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:00,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:00,649 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:00,649 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:00,656 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:13:00,670 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:13:00,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:00,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:00,680 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:00,700 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:00,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-28 10:13:00,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 10:13:00,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 10:13:00,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-28 10:13:00,701 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 18 states. [2018-09-28 10:13:00,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:00,772 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2018-09-28 10:13:00,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-28 10:13:00,772 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2018-09-28 10:13:00,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:00,773 INFO L225 Difference]: With dead ends: 56 [2018-09-28 10:13:00,773 INFO L226 Difference]: Without dead ends: 52 [2018-09-28 10:13:00,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-28 10:13:00,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-28 10:13:00,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-28 10:13:00,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-28 10:13:00,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-09-28 10:13:00,777 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2018-09-28 10:13:00,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:00,777 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-09-28 10:13:00,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 10:13:00,777 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-09-28 10:13:00,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-28 10:13:00,778 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:00,778 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1] [2018-09-28 10:13:00,778 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:00,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:00,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1979244437, now seen corresponding path program 15 times [2018-09-28 10:13:00,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:00,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:00,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:00,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:00,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:01,408 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:01,408 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:01,416 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:13:01,474 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-09-28 10:13:01,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:01,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:01,761 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:01,782 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:01,782 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-28 10:13:01,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-28 10:13:01,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-28 10:13:01,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2018-09-28 10:13:01,783 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 35 states. [2018-09-28 10:13:02,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:02,955 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2018-09-28 10:13:02,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 10:13:02,956 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 50 [2018-09-28 10:13:02,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:02,956 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:13:02,956 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:13:02,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1443, Invalid=2979, Unknown=0, NotChecked=0, Total=4422 [2018-09-28 10:13:02,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:13:02,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-28 10:13:02,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-28 10:13:02,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-09-28 10:13:02,962 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2018-09-28 10:13:02,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:02,963 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-09-28 10:13:02,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-28 10:13:02,963 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-09-28 10:13:02,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-28 10:13:02,964 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:02,964 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1] [2018-09-28 10:13:02,964 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:02,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:02,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1933545079, now seen corresponding path program 16 times [2018-09-28 10:13:02,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:02,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:02,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:02,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:02,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:03,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:03,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:03,193 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:13:03,206 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:13:03,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:03,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:03,235 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:03,236 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-28 10:13:03,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-28 10:13:03,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-28 10:13:03,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-28 10:13:03,236 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 19 states. [2018-09-28 10:13:03,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:03,294 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2018-09-28 10:13:03,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-28 10:13:03,295 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2018-09-28 10:13:03,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:03,295 INFO L225 Difference]: With dead ends: 60 [2018-09-28 10:13:03,296 INFO L226 Difference]: Without dead ends: 56 [2018-09-28 10:13:03,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-28 10:13:03,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-28 10:13:03,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-28 10:13:03,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-28 10:13:03,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-09-28 10:13:03,299 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-09-28 10:13:03,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:03,300 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-09-28 10:13:03,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-28 10:13:03,300 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-09-28 10:13:03,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-28 10:13:03,300 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:03,300 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1] [2018-09-28 10:13:03,301 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:03,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:03,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1933545017, now seen corresponding path program 11 times [2018-09-28 10:13:03,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:03,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:03,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:03,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:03,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:03,580 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:03,580 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:03,588 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:13:03,618 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-28 10:13:03,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:03,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:03,629 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:03,661 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:03,661 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-28 10:13:03,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 10:13:03,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 10:13:03,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-28 10:13:03,662 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 20 states. [2018-09-28 10:13:03,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:03,742 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2018-09-28 10:13:03,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-28 10:13:03,743 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2018-09-28 10:13:03,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:03,744 INFO L225 Difference]: With dead ends: 62 [2018-09-28 10:13:03,744 INFO L226 Difference]: Without dead ends: 58 [2018-09-28 10:13:03,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-28 10:13:03,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-28 10:13:03,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-28 10:13:03,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-28 10:13:03,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-09-28 10:13:03,748 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2018-09-28 10:13:03,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:03,748 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-09-28 10:13:03,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 10:13:03,749 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-09-28 10:13:03,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-28 10:13:03,749 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:03,749 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1] [2018-09-28 10:13:03,749 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:03,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:03,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1861364501, now seen corresponding path program 17 times [2018-09-28 10:13:03,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:03,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:03,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:03,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:03,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:04,021 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:04,022 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:04,022 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:04,031 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:13:04,056 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-28 10:13:04,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:04,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:04,100 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:04,100 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-28 10:13:04,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 10:13:04,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 10:13:04,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-28 10:13:04,101 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 20 states. [2018-09-28 10:13:04,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:04,179 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2018-09-28 10:13:04,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-28 10:13:04,179 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2018-09-28 10:13:04,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:04,180 INFO L225 Difference]: With dead ends: 63 [2018-09-28 10:13:04,180 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:13:04,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-28 10:13:04,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:13:04,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-28 10:13:04,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-28 10:13:04,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-09-28 10:13:04,185 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2018-09-28 10:13:04,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:04,185 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-09-28 10:13:04,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 10:13:04,185 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-09-28 10:13:04,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-28 10:13:04,186 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:04,186 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1] [2018-09-28 10:13:04,186 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:04,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:04,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1861364563, now seen corresponding path program 12 times [2018-09-28 10:13:04,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:04,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:04,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:04,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:04,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:04,866 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:04,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:04,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:04,874 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:13:04,906 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-28 10:13:04,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:04,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:04,940 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:04,940 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-28 10:13:04,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-28 10:13:04,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-28 10:13:04,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-28 10:13:04,941 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 21 states. [2018-09-28 10:13:04,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:04,991 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2018-09-28 10:13:04,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-28 10:13:04,996 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2018-09-28 10:13:04,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:04,997 INFO L225 Difference]: With dead ends: 65 [2018-09-28 10:13:04,997 INFO L226 Difference]: Without dead ends: 61 [2018-09-28 10:13:04,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-28 10:13:04,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-28 10:13:05,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-28 10:13:05,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-28 10:13:05,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-09-28 10:13:05,001 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2018-09-28 10:13:05,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:05,001 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-09-28 10:13:05,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-28 10:13:05,001 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-09-28 10:13:05,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-28 10:13:05,002 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:05,002 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1] [2018-09-28 10:13:05,002 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:05,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:05,003 INFO L82 PathProgramCache]: Analyzing trace with hash -411470327, now seen corresponding path program 18 times [2018-09-28 10:13:05,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:05,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:05,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:05,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:05,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:05,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:05,381 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 19 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:05,381 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:05,382 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:05,390 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:13:05,423 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-28 10:13:05,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:05,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:05,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:05,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-28 10:13:05,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-28 10:13:05,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-28 10:13:05,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2018-09-28 10:13:05,836 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 41 states. [2018-09-28 10:13:06,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:06,911 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2018-09-28 10:13:06,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-28 10:13:06,911 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 59 [2018-09-28 10:13:06,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:06,912 INFO L225 Difference]: With dead ends: 68 [2018-09-28 10:13:06,912 INFO L226 Difference]: Without dead ends: 64 [2018-09-28 10:13:06,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1998, Invalid=4164, Unknown=0, NotChecked=0, Total=6162 [2018-09-28 10:13:06,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-28 10:13:06,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-28 10:13:06,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-28 10:13:06,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-09-28 10:13:06,918 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2018-09-28 10:13:06,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:06,918 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-09-28 10:13:06,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-28 10:13:06,919 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-09-28 10:13:06,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-28 10:13:06,919 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:06,919 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1] [2018-09-28 10:13:06,920 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:06,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:06,920 INFO L82 PathProgramCache]: Analyzing trace with hash -274409835, now seen corresponding path program 19 times [2018-09-28 10:13:06,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:06,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:06,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:06,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:06,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 20 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:07,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:07,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:07,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:07,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 20 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:07,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:07,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-28 10:13:07,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-28 10:13:07,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-28 10:13:07,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-28 10:13:07,481 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 22 states. [2018-09-28 10:13:07,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:07,524 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2018-09-28 10:13:07,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-28 10:13:07,524 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2018-09-28 10:13:07,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:07,525 INFO L225 Difference]: With dead ends: 69 [2018-09-28 10:13:07,525 INFO L226 Difference]: Without dead ends: 65 [2018-09-28 10:13:07,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-28 10:13:07,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-28 10:13:07,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-28 10:13:07,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-28 10:13:07,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-09-28 10:13:07,530 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2018-09-28 10:13:07,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:07,530 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-09-28 10:13:07,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-28 10:13:07,531 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-09-28 10:13:07,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-28 10:13:07,531 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:07,531 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1] [2018-09-28 10:13:07,531 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:07,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:07,532 INFO L82 PathProgramCache]: Analyzing trace with hash -274409773, now seen corresponding path program 13 times [2018-09-28 10:13:07,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:07,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:07,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:07,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:07,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:08,031 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:08,031 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:08,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:08,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:08,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:08,093 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:08,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-28 10:13:08,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-28 10:13:08,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-28 10:13:08,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-28 10:13:08,094 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 23 states. [2018-09-28 10:13:08,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:08,150 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2018-09-28 10:13:08,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 10:13:08,150 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 62 [2018-09-28 10:13:08,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:08,151 INFO L225 Difference]: With dead ends: 71 [2018-09-28 10:13:08,151 INFO L226 Difference]: Without dead ends: 67 [2018-09-28 10:13:08,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-28 10:13:08,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-28 10:13:08,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-28 10:13:08,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-28 10:13:08,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2018-09-28 10:13:08,155 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 62 [2018-09-28 10:13:08,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:08,155 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2018-09-28 10:13:08,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-28 10:13:08,155 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2018-09-28 10:13:08,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-28 10:13:08,156 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:08,156 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1] [2018-09-28 10:13:08,156 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:08,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:08,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1619191159, now seen corresponding path program 20 times [2018-09-28 10:13:08,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:08,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:08,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:08,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:08,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:08,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 21 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:08,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:08,422 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:08,429 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:13:08,449 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:13:08,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:08,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:08,461 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 21 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:08,484 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:08,484 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-28 10:13:08,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-28 10:13:08,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-28 10:13:08,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-28 10:13:08,485 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 23 states. [2018-09-28 10:13:08,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:08,530 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2018-09-28 10:13:08,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 10:13:08,530 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2018-09-28 10:13:08,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:08,531 INFO L225 Difference]: With dead ends: 72 [2018-09-28 10:13:08,531 INFO L226 Difference]: Without dead ends: 68 [2018-09-28 10:13:08,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-28 10:13:08,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-28 10:13:08,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-28 10:13:08,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-28 10:13:08,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-09-28 10:13:08,535 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-09-28 10:13:08,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:08,535 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-09-28 10:13:08,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-28 10:13:08,536 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-09-28 10:13:08,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-28 10:13:08,536 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:08,536 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1] [2018-09-28 10:13:08,536 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:08,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:08,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1619191097, now seen corresponding path program 14 times [2018-09-28 10:13:08,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:08,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:08,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:08,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:08,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:08,820 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:08,821 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:08,827 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:13:08,863 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:13:08,864 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:08,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:08,876 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:08,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:08,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-28 10:13:08,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-28 10:13:08,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-28 10:13:08,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-28 10:13:08,900 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 24 states. [2018-09-28 10:13:08,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:08,983 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2018-09-28 10:13:08,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 10:13:08,984 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2018-09-28 10:13:08,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:08,985 INFO L225 Difference]: With dead ends: 74 [2018-09-28 10:13:08,985 INFO L226 Difference]: Without dead ends: 70 [2018-09-28 10:13:08,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-28 10:13:08,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-28 10:13:08,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-28 10:13:08,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-28 10:13:08,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-09-28 10:13:08,989 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2018-09-28 10:13:08,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:08,989 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-09-28 10:13:08,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-28 10:13:08,989 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-09-28 10:13:08,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-28 10:13:08,990 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:08,990 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1] [2018-09-28 10:13:08,990 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:08,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:08,991 INFO L82 PathProgramCache]: Analyzing trace with hash -544677355, now seen corresponding path program 21 times [2018-09-28 10:13:08,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:08,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:08,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:08,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:08,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 22 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:09,306 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:09,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:09,313 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:13:09,351 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-09-28 10:13:09,351 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:09,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:10,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:10,210 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-28 10:13:10,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-28 10:13:10,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-28 10:13:10,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2018-09-28 10:13:10,211 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 47 states. [2018-09-28 10:13:11,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:11,342 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2018-09-28 10:13:11,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-28 10:13:11,343 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 68 [2018-09-28 10:13:11,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:11,344 INFO L225 Difference]: With dead ends: 77 [2018-09-28 10:13:11,344 INFO L226 Difference]: Without dead ends: 73 [2018-09-28 10:13:11,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2643, Invalid=5547, Unknown=0, NotChecked=0, Total=8190 [2018-09-28 10:13:11,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-28 10:13:11,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-28 10:13:11,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-28 10:13:11,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-09-28 10:13:11,350 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 68 [2018-09-28 10:13:11,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:11,350 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-09-28 10:13:11,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-28 10:13:11,351 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-09-28 10:13:11,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-28 10:13:11,351 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:11,351 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1] [2018-09-28 10:13:11,351 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:11,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:11,352 INFO L82 PathProgramCache]: Analyzing trace with hash -95199479, now seen corresponding path program 22 times [2018-09-28 10:13:11,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:11,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:11,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:11,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:11,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:11,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:11,686 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 23 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:11,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:11,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:11,700 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:13:11,729 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:13:11,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:11,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:12,186 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:12,206 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:12,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-28 10:13:12,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-28 10:13:12,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-28 10:13:12,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2018-09-28 10:13:12,208 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 49 states. [2018-09-28 10:13:13,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:13,498 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2018-09-28 10:13:13,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-28 10:13:13,499 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 71 [2018-09-28 10:13:13,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:13,500 INFO L225 Difference]: With dead ends: 80 [2018-09-28 10:13:13,500 INFO L226 Difference]: Without dead ends: 76 [2018-09-28 10:13:13,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2878, Invalid=6052, Unknown=0, NotChecked=0, Total=8930 [2018-09-28 10:13:13,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-28 10:13:13,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-28 10:13:13,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-28 10:13:13,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-09-28 10:13:13,506 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 71 [2018-09-28 10:13:13,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:13,506 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-09-28 10:13:13,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-28 10:13:13,507 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-09-28 10:13:13,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-28 10:13:13,507 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:13,507 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1] [2018-09-28 10:13:13,507 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:13,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:13,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824491, now seen corresponding path program 23 times [2018-09-28 10:13:13,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:13,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:13,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:13,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:13,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:13,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:13,803 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 24 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:13,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:13,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:13,810 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:13:13,849 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-28 10:13:13,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:13,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 24 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:13,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:13,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-28 10:13:13,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-28 10:13:13,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-28 10:13:13,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-28 10:13:13,888 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 26 states. [2018-09-28 10:13:13,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:13,985 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2018-09-28 10:13:13,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-28 10:13:13,986 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2018-09-28 10:13:13,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:13,987 INFO L225 Difference]: With dead ends: 81 [2018-09-28 10:13:13,987 INFO L226 Difference]: Without dead ends: 77 [2018-09-28 10:13:13,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-28 10:13:13,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-28 10:13:13,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-28 10:13:13,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-28 10:13:13,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2018-09-28 10:13:13,992 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2018-09-28 10:13:13,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:13,992 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2018-09-28 10:13:13,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-28 10:13:13,992 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2018-09-28 10:13:13,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-28 10:13:13,993 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:13,993 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1] [2018-09-28 10:13:13,993 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:13,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:13,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824429, now seen corresponding path program 15 times [2018-09-28 10:13:13,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:13,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:13,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:13,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:13,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:14,513 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:14,513 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:14,521 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:13:14,563 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-09-28 10:13:14,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:14,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:14,582 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:14,614 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:14,614 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-28 10:13:14,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-28 10:13:14,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-28 10:13:14,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-28 10:13:14,616 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 27 states. [2018-09-28 10:13:14,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:14,722 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2018-09-28 10:13:14,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 10:13:14,722 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 74 [2018-09-28 10:13:14,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:14,723 INFO L225 Difference]: With dead ends: 83 [2018-09-28 10:13:14,723 INFO L226 Difference]: Without dead ends: 79 [2018-09-28 10:13:14,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-28 10:13:14,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-28 10:13:14,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-28 10:13:14,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-28 10:13:14,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2018-09-28 10:13:14,729 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2018-09-28 10:13:14,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:14,730 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2018-09-28 10:13:14,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-28 10:13:14,730 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2018-09-28 10:13:14,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-28 10:13:14,731 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:14,731 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1] [2018-09-28 10:13:14,731 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:14,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:14,731 INFO L82 PathProgramCache]: Analyzing trace with hash -142326903, now seen corresponding path program 24 times [2018-09-28 10:13:14,731 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:14,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:14,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:14,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:14,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 25 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:15,246 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:15,246 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:15,253 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:13:15,292 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-28 10:13:15,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:15,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:15,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:15,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-28 10:13:15,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-28 10:13:15,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-28 10:13:15,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=2028, Unknown=0, NotChecked=0, Total=2756 [2018-09-28 10:13:15,837 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 53 states. [2018-09-28 10:13:17,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:17,175 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2018-09-28 10:13:17,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-28 10:13:17,176 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 77 [2018-09-28 10:13:17,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:17,177 INFO L225 Difference]: With dead ends: 86 [2018-09-28 10:13:17,177 INFO L226 Difference]: Without dead ends: 82 [2018-09-28 10:13:17,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3378, Invalid=7128, Unknown=0, NotChecked=0, Total=10506 [2018-09-28 10:13:17,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-28 10:13:17,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-28 10:13:17,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-28 10:13:17,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-09-28 10:13:17,181 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 77 [2018-09-28 10:13:17,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:17,182 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-09-28 10:13:17,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-28 10:13:17,182 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-09-28 10:13:17,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-28 10:13:17,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:17,182 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1] [2018-09-28 10:13:17,182 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:17,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:17,183 INFO L82 PathProgramCache]: Analyzing trace with hash -926607083, now seen corresponding path program 25 times [2018-09-28 10:13:17,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:17,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:17,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:17,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:17,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:18,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 26 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:18,077 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:18,078 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:18,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:18,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:18,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 26 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:18,149 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:18,149 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-28 10:13:18,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-28 10:13:18,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-28 10:13:18,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-28 10:13:18,150 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 28 states. [2018-09-28 10:13:18,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:18,221 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2018-09-28 10:13:18,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-28 10:13:18,221 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2018-09-28 10:13:18,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:18,222 INFO L225 Difference]: With dead ends: 87 [2018-09-28 10:13:18,222 INFO L226 Difference]: Without dead ends: 83 [2018-09-28 10:13:18,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-28 10:13:18,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-28 10:13:18,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-28 10:13:18,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-28 10:13:18,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2018-09-28 10:13:18,227 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2018-09-28 10:13:18,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:18,227 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2018-09-28 10:13:18,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-28 10:13:18,227 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2018-09-28 10:13:18,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-28 10:13:18,228 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:18,228 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1] [2018-09-28 10:13:18,228 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:18,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:18,229 INFO L82 PathProgramCache]: Analyzing trace with hash -926607021, now seen corresponding path program 16 times [2018-09-28 10:13:18,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:18,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:18,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:18,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:18,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:18,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:18,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:18,829 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:18,836 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:13:18,863 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:13:18,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:18,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:18,897 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:18,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-28 10:13:18,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-28 10:13:18,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-28 10:13:18,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-28 10:13:18,898 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 29 states. [2018-09-28 10:13:19,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:19,017 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2018-09-28 10:13:19,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 10:13:19,017 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 80 [2018-09-28 10:13:19,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:19,018 INFO L225 Difference]: With dead ends: 89 [2018-09-28 10:13:19,018 INFO L226 Difference]: Without dead ends: 85 [2018-09-28 10:13:19,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-28 10:13:19,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-28 10:13:19,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-28 10:13:19,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-28 10:13:19,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-09-28 10:13:19,021 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 80 [2018-09-28 10:13:19,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:19,022 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-09-28 10:13:19,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-28 10:13:19,022 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-09-28 10:13:19,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-28 10:13:19,022 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:19,022 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1] [2018-09-28 10:13:19,022 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:19,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:19,023 INFO L82 PathProgramCache]: Analyzing trace with hash -795359223, now seen corresponding path program 26 times [2018-09-28 10:13:19,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:19,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:19,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:19,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:19,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:19,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 27 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:20,274 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:20,274 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:20,282 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:13:20,306 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:13:20,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:20,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 27 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:20,342 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:20,342 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-28 10:13:20,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-28 10:13:20,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-28 10:13:20,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-28 10:13:20,343 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 29 states. [2018-09-28 10:13:20,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:20,385 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2018-09-28 10:13:20,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 10:13:20,386 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 83 [2018-09-28 10:13:20,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:20,387 INFO L225 Difference]: With dead ends: 90 [2018-09-28 10:13:20,387 INFO L226 Difference]: Without dead ends: 86 [2018-09-28 10:13:20,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-28 10:13:20,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-28 10:13:20,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-28 10:13:20,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-28 10:13:20,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-09-28 10:13:20,391 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2018-09-28 10:13:20,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:20,391 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-09-28 10:13:20,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-28 10:13:20,392 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-09-28 10:13:20,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-28 10:13:20,392 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:20,392 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1] [2018-09-28 10:13:20,392 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:20,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:20,392 INFO L82 PathProgramCache]: Analyzing trace with hash -795359161, now seen corresponding path program 17 times [2018-09-28 10:13:20,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:20,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:20,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:20,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:20,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:21,196 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:21,196 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:21,203 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:13:21,248 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-28 10:13:21,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:21,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:21,295 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:21,296 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-28 10:13:21,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-28 10:13:21,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-28 10:13:21,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-28 10:13:21,296 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 30 states. [2018-09-28 10:13:21,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:21,352 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2018-09-28 10:13:21,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-28 10:13:21,352 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2018-09-28 10:13:21,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:21,353 INFO L225 Difference]: With dead ends: 92 [2018-09-28 10:13:21,353 INFO L226 Difference]: Without dead ends: 88 [2018-09-28 10:13:21,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-28 10:13:21,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-28 10:13:21,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-28 10:13:21,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-28 10:13:21,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-09-28 10:13:21,357 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 83 [2018-09-28 10:13:21,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:21,358 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-09-28 10:13:21,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-28 10:13:21,358 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-09-28 10:13:21,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-28 10:13:21,358 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:21,359 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1] [2018-09-28 10:13:21,359 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:21,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:21,359 INFO L82 PathProgramCache]: Analyzing trace with hash 789398677, now seen corresponding path program 27 times [2018-09-28 10:13:21,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:21,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:21,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:21,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:21,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 28 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:21,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:21,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:21,745 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:13:21,790 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-09-28 10:13:21,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:21,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:22,452 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:22,453 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-28 10:13:22,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-28 10:13:22,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-28 10:13:22,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=2523, Unknown=0, NotChecked=0, Total=3422 [2018-09-28 10:13:22,454 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 59 states. [2018-09-28 10:13:24,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:24,242 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2018-09-28 10:13:24,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-28 10:13:24,242 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 86 [2018-09-28 10:13:24,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:24,243 INFO L225 Difference]: With dead ends: 95 [2018-09-28 10:13:24,243 INFO L226 Difference]: Without dead ends: 91 [2018-09-28 10:13:24,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4203, Invalid=8907, Unknown=0, NotChecked=0, Total=13110 [2018-09-28 10:13:24,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-28 10:13:24,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-28 10:13:24,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-28 10:13:24,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-09-28 10:13:24,248 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2018-09-28 10:13:24,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:24,249 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-09-28 10:13:24,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-28 10:13:24,249 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-09-28 10:13:24,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-28 10:13:24,249 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:24,249 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1] [2018-09-28 10:13:24,250 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:24,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:24,250 INFO L82 PathProgramCache]: Analyzing trace with hash 2031479945, now seen corresponding path program 28 times [2018-09-28 10:13:24,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:24,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:24,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:24,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:24,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 29 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:24,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:24,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:24,712 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:13:24,739 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:13:24,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:24,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 29 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:24,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:24,772 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-28 10:13:24,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-28 10:13:24,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-28 10:13:24,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-28 10:13:24,773 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 31 states. [2018-09-28 10:13:24,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:24,883 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2018-09-28 10:13:24,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-28 10:13:24,883 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 89 [2018-09-28 10:13:24,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:24,884 INFO L225 Difference]: With dead ends: 96 [2018-09-28 10:13:24,884 INFO L226 Difference]: Without dead ends: 92 [2018-09-28 10:13:24,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-28 10:13:24,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-28 10:13:24,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-28 10:13:24,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-28 10:13:24,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-09-28 10:13:24,890 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2018-09-28 10:13:24,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:24,890 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-09-28 10:13:24,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-28 10:13:24,890 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-09-28 10:13:24,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-28 10:13:24,891 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:24,891 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1] [2018-09-28 10:13:24,891 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:24,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:24,892 INFO L82 PathProgramCache]: Analyzing trace with hash 2031480007, now seen corresponding path program 18 times [2018-09-28 10:13:24,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:24,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:24,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:24,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:24,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:25,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:25,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:25,494 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:13:25,542 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-09-28 10:13:25,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:25,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:25,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:25,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-28 10:13:25,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-28 10:13:25,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-28 10:13:25,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-28 10:13:25,598 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 32 states. [2018-09-28 10:13:26,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:26,094 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2018-09-28 10:13:26,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 10:13:26,095 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 89 [2018-09-28 10:13:26,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:26,096 INFO L225 Difference]: With dead ends: 98 [2018-09-28 10:13:26,096 INFO L226 Difference]: Without dead ends: 94 [2018-09-28 10:13:26,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-28 10:13:26,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-28 10:13:26,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-28 10:13:26,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-28 10:13:26,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-09-28 10:13:26,100 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 89 [2018-09-28 10:13:26,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:26,100 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-09-28 10:13:26,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-28 10:13:26,100 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-09-28 10:13:26,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-28 10:13:26,101 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:26,101 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1] [2018-09-28 10:13:26,101 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:26,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:26,102 INFO L82 PathProgramCache]: Analyzing trace with hash -563687403, now seen corresponding path program 29 times [2018-09-28 10:13:26,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:26,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:26,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:26,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:26,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:26,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 30 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:26,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:26,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:26,642 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:13:26,698 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-28 10:13:26,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:26,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:26,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 30 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:26,734 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:26,734 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-28 10:13:26,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-28 10:13:26,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-28 10:13:26,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-28 10:13:26,735 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 32 states. [2018-09-28 10:13:26,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:26,825 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2018-09-28 10:13:26,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 10:13:26,826 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 92 [2018-09-28 10:13:26,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:26,827 INFO L225 Difference]: With dead ends: 99 [2018-09-28 10:13:26,827 INFO L226 Difference]: Without dead ends: 95 [2018-09-28 10:13:26,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-28 10:13:26,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-28 10:13:26,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-28 10:13:26,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-28 10:13:26,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-09-28 10:13:26,831 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2018-09-28 10:13:26,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:26,831 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-09-28 10:13:26,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-28 10:13:26,832 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-09-28 10:13:26,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-28 10:13:26,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:26,832 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1] [2018-09-28 10:13:26,832 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:26,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:26,833 INFO L82 PathProgramCache]: Analyzing trace with hash -563687341, now seen corresponding path program 19 times [2018-09-28 10:13:26,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:26,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:26,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:26,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:26,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:27,533 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:27,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:27,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:27,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:27,605 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:27,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-28 10:13:27,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-28 10:13:27,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-28 10:13:27,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-28 10:13:27,607 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 33 states. [2018-09-28 10:13:27,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:27,770 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2018-09-28 10:13:27,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-28 10:13:27,771 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 92 [2018-09-28 10:13:27,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:27,772 INFO L225 Difference]: With dead ends: 101 [2018-09-28 10:13:27,772 INFO L226 Difference]: Without dead ends: 97 [2018-09-28 10:13:27,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-28 10:13:27,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-28 10:13:27,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-28 10:13:27,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-28 10:13:27,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2018-09-28 10:13:27,777 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 92 [2018-09-28 10:13:27,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:27,777 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2018-09-28 10:13:27,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-28 10:13:27,777 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2018-09-28 10:13:27,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-28 10:13:27,778 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:27,778 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1] [2018-09-28 10:13:27,778 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:27,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:27,778 INFO L82 PathProgramCache]: Analyzing trace with hash 512143625, now seen corresponding path program 30 times [2018-09-28 10:13:27,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:27,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:27,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:27,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:27,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:28,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 31 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:28,522 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:28,522 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:28,530 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:13:28,582 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-09-28 10:13:28,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:28,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:29,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:29,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:29,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-28 10:13:29,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-28 10:13:29,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-28 10:13:29,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1088, Invalid=3072, Unknown=0, NotChecked=0, Total=4160 [2018-09-28 10:13:29,490 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 65 states. [2018-09-28 10:13:31,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:31,709 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2018-09-28 10:13:31,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-28 10:13:31,709 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 95 [2018-09-28 10:13:31,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:31,711 INFO L225 Difference]: With dead ends: 104 [2018-09-28 10:13:31,711 INFO L226 Difference]: Without dead ends: 100 [2018-09-28 10:13:31,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5118, Invalid=10884, Unknown=0, NotChecked=0, Total=16002 [2018-09-28 10:13:31,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-28 10:13:31,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-28 10:13:31,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-28 10:13:31,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-09-28 10:13:31,716 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 95 [2018-09-28 10:13:31,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:31,716 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-09-28 10:13:31,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-28 10:13:31,717 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-09-28 10:13:31,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-28 10:13:31,717 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:31,717 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1] [2018-09-28 10:13:31,717 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:31,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:31,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1548336021, now seen corresponding path program 31 times [2018-09-28 10:13:31,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:31,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:31,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:31,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:31,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 32 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:32,352 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:32,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:32,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:32,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:32,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 32 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:32,429 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:32,429 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-28 10:13:32,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-28 10:13:32,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-28 10:13:32,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-28 10:13:32,430 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 34 states. [2018-09-28 10:13:32,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:32,683 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2018-09-28 10:13:32,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 10:13:32,683 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 98 [2018-09-28 10:13:32,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:32,684 INFO L225 Difference]: With dead ends: 105 [2018-09-28 10:13:32,684 INFO L226 Difference]: Without dead ends: 101 [2018-09-28 10:13:32,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-28 10:13:32,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-28 10:13:32,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-28 10:13:32,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-28 10:13:32,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-09-28 10:13:32,689 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2018-09-28 10:13:32,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:32,689 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-09-28 10:13:32,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-28 10:13:32,689 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-09-28 10:13:32,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-28 10:13:32,690 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:32,690 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1] [2018-09-28 10:13:32,690 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:32,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:32,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1548336083, now seen corresponding path program 20 times [2018-09-28 10:13:32,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:32,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:32,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:32,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:32,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:33,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:33,737 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:33,737 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:33,747 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:13:33,779 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:13:33,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:33,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:33,815 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:33,815 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-28 10:13:33,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-28 10:13:33,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-28 10:13:33,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-28 10:13:33,816 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 35 states. [2018-09-28 10:13:33,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:33,896 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2018-09-28 10:13:33,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 10:13:33,896 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 98 [2018-09-28 10:13:33,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:33,897 INFO L225 Difference]: With dead ends: 107 [2018-09-28 10:13:33,898 INFO L226 Difference]: Without dead ends: 103 [2018-09-28 10:13:33,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-28 10:13:33,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-28 10:13:33,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-28 10:13:33,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-28 10:13:33,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2018-09-28 10:13:33,903 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 98 [2018-09-28 10:13:33,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:33,903 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2018-09-28 10:13:33,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-28 10:13:33,904 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2018-09-28 10:13:33,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-28 10:13:33,904 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:33,904 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1] [2018-09-28 10:13:33,905 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:33,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:33,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1468918391, now seen corresponding path program 32 times [2018-09-28 10:13:33,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:33,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:33,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:33,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:33,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 33 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:34,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:34,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:34,566 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:13:34,613 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:13:34,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:34,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:34,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 33 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:34,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:34,659 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-28 10:13:34,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-28 10:13:34,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-28 10:13:34,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-28 10:13:34,659 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 35 states. [2018-09-28 10:13:34,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:34,757 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2018-09-28 10:13:34,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 10:13:34,757 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 101 [2018-09-28 10:13:34,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:34,758 INFO L225 Difference]: With dead ends: 108 [2018-09-28 10:13:34,758 INFO L226 Difference]: Without dead ends: 104 [2018-09-28 10:13:34,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-28 10:13:34,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-28 10:13:34,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-28 10:13:34,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-28 10:13:34,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-09-28 10:13:34,763 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2018-09-28 10:13:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:34,764 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-09-28 10:13:34,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-28 10:13:34,764 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-09-28 10:13:34,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-28 10:13:34,764 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:34,765 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1] [2018-09-28 10:13:34,765 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:34,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:34,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1468918329, now seen corresponding path program 21 times [2018-09-28 10:13:34,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:34,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:34,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:34,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:34,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:34,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:35,685 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:35,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:35,693 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:13:35,750 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-28 10:13:35,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:35,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:35,799 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:35,800 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-28 10:13:35,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-28 10:13:35,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-28 10:13:35,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-28 10:13:35,801 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 36 states. [2018-09-28 10:13:35,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:35,959 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2018-09-28 10:13:35,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-28 10:13:35,960 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 101 [2018-09-28 10:13:35,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:35,961 INFO L225 Difference]: With dead ends: 110 [2018-09-28 10:13:35,961 INFO L226 Difference]: Without dead ends: 106 [2018-09-28 10:13:35,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-28 10:13:35,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-28 10:13:35,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-28 10:13:35,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-28 10:13:35,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-09-28 10:13:35,967 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 101 [2018-09-28 10:13:35,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:35,967 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-09-28 10:13:35,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-28 10:13:35,967 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-09-28 10:13:35,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-28 10:13:35,968 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:35,968 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1] [2018-09-28 10:13:35,968 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:35,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:35,969 INFO L82 PathProgramCache]: Analyzing trace with hash 875431701, now seen corresponding path program 33 times [2018-09-28 10:13:35,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:35,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:35,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:35,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:35,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 34 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:36,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:36,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:36,571 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:13:36,628 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-09-28 10:13:36,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:36,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:37,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:37,568 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:37,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-28 10:13:37,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-28 10:13:37,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-28 10:13:37,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=3675, Unknown=0, NotChecked=0, Total=4970 [2018-09-28 10:13:37,569 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 71 states. [2018-09-28 10:13:39,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:39,842 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2018-09-28 10:13:39,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-28 10:13:39,842 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 104 [2018-09-28 10:13:39,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:39,843 INFO L225 Difference]: With dead ends: 113 [2018-09-28 10:13:39,843 INFO L226 Difference]: Without dead ends: 109 [2018-09-28 10:13:39,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3433 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=6123, Invalid=13059, Unknown=0, NotChecked=0, Total=19182 [2018-09-28 10:13:39,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-28 10:13:39,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-28 10:13:39,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-28 10:13:39,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2018-09-28 10:13:39,849 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 104 [2018-09-28 10:13:39,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:39,849 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2018-09-28 10:13:39,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-28 10:13:39,849 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2018-09-28 10:13:39,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-28 10:13:39,850 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:39,850 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1] [2018-09-28 10:13:39,850 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:39,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:39,851 INFO L82 PathProgramCache]: Analyzing trace with hash 945822217, now seen corresponding path program 34 times [2018-09-28 10:13:39,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:39,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:39,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:39,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:39,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 35 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:40,786 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:40,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:40,793 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:13:40,824 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:13:40,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:40,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:40,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 35 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:40,860 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:40,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-28 10:13:40,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-28 10:13:40,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-28 10:13:40,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-28 10:13:40,861 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 37 states. [2018-09-28 10:13:40,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:40,937 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2018-09-28 10:13:40,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-28 10:13:40,938 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 107 [2018-09-28 10:13:40,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:40,939 INFO L225 Difference]: With dead ends: 114 [2018-09-28 10:13:40,939 INFO L226 Difference]: Without dead ends: 110 [2018-09-28 10:13:40,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-28 10:13:40,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-28 10:13:40,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-28 10:13:40,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-28 10:13:40,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-09-28 10:13:40,944 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2018-09-28 10:13:40,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:40,944 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-09-28 10:13:40,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-28 10:13:40,944 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-09-28 10:13:40,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-28 10:13:40,945 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:40,945 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1] [2018-09-28 10:13:40,945 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:40,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:40,945 INFO L82 PathProgramCache]: Analyzing trace with hash 945822279, now seen corresponding path program 22 times [2018-09-28 10:13:40,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:40,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:40,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:40,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:40,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:40,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:41,853 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:41,854 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:41,861 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:13:41,894 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:13:41,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:41,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:41,929 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:41,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-28 10:13:41,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-28 10:13:41,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-28 10:13:41,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-28 10:13:41,930 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 38 states. [2018-09-28 10:13:41,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:41,985 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-09-28 10:13:41,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-28 10:13:41,985 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 107 [2018-09-28 10:13:41,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:41,986 INFO L225 Difference]: With dead ends: 116 [2018-09-28 10:13:41,986 INFO L226 Difference]: Without dead ends: 112 [2018-09-28 10:13:41,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-28 10:13:41,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-28 10:13:41,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-28 10:13:41,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-28 10:13:41,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-09-28 10:13:41,990 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2018-09-28 10:13:41,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:41,990 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-09-28 10:13:41,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-28 10:13:41,990 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-09-28 10:13:41,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-28 10:13:41,991 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:41,991 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1] [2018-09-28 10:13:41,991 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:41,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:41,991 INFO L82 PathProgramCache]: Analyzing trace with hash 2005643925, now seen corresponding path program 35 times [2018-09-28 10:13:41,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:41,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:41,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:41,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:41,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:43,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 36 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:43,838 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:43,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:43,845 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:13:43,902 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-28 10:13:43,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:43,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 36 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:43,948 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:43,948 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-28 10:13:43,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-28 10:13:43,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-28 10:13:43,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-28 10:13:43,949 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 38 states. [2018-09-28 10:13:44,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:44,046 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2018-09-28 10:13:44,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-28 10:13:44,047 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 110 [2018-09-28 10:13:44,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:44,048 INFO L225 Difference]: With dead ends: 117 [2018-09-28 10:13:44,048 INFO L226 Difference]: Without dead ends: 113 [2018-09-28 10:13:44,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-28 10:13:44,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-28 10:13:44,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-28 10:13:44,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-28 10:13:44,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2018-09-28 10:13:44,052 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 110 [2018-09-28 10:13:44,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:44,053 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2018-09-28 10:13:44,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-28 10:13:44,053 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2018-09-28 10:13:44,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-28 10:13:44,053 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:44,054 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1] [2018-09-28 10:13:44,054 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:44,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:44,054 INFO L82 PathProgramCache]: Analyzing trace with hash 2005643987, now seen corresponding path program 23 times [2018-09-28 10:13:44,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:44,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:44,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:44,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:44,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:44,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:44,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:44,728 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:13:44,789 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-28 10:13:44,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:44,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:44,829 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:44,829 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-28 10:13:44,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-28 10:13:44,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-28 10:13:44,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-28 10:13:44,830 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 39 states. [2018-09-28 10:13:44,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:44,926 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2018-09-28 10:13:44,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-28 10:13:44,927 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 110 [2018-09-28 10:13:44,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:44,928 INFO L225 Difference]: With dead ends: 119 [2018-09-28 10:13:44,928 INFO L226 Difference]: Without dead ends: 115 [2018-09-28 10:13:44,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-28 10:13:44,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-28 10:13:44,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-28 10:13:44,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-28 10:13:44,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-09-28 10:13:44,932 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 110 [2018-09-28 10:13:44,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:44,932 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-09-28 10:13:44,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-28 10:13:44,932 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-09-28 10:13:44,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-28 10:13:44,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:44,933 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 1, 1, 1] [2018-09-28 10:13:44,933 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:44,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:44,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1445413239, now seen corresponding path program 36 times [2018-09-28 10:13:44,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:44,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:44,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:44,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:44,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:45,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 37 proven. 1998 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:45,759 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:45,759 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:45,766 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:13:45,826 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-28 10:13:45,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:45,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:47,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:47,020 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:47,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-28 10:13:47,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-28 10:13:47,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-28 10:13:47,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1520, Invalid=4332, Unknown=0, NotChecked=0, Total=5852 [2018-09-28 10:13:47,022 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 77 states. [2018-09-28 10:13:49,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:49,800 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2018-09-28 10:13:49,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-28 10:13:49,800 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 113 [2018-09-28 10:13:49,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:49,801 INFO L225 Difference]: With dead ends: 122 [2018-09-28 10:13:49,801 INFO L226 Difference]: Without dead ends: 118 [2018-09-28 10:13:49,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=7218, Invalid=15432, Unknown=0, NotChecked=0, Total=22650 [2018-09-28 10:13:49,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-28 10:13:49,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-28 10:13:49,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-28 10:13:49,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-09-28 10:13:49,806 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 113 [2018-09-28 10:13:49,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:49,807 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-09-28 10:13:49,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-28 10:13:49,807 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-09-28 10:13:49,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-28 10:13:49,807 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:49,808 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 1, 1, 1] [2018-09-28 10:13:49,808 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:49,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:49,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1037745685, now seen corresponding path program 37 times [2018-09-28 10:13:49,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:49,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:49,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:49,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:49,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 38 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:52,348 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:52,348 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:52,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:52,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 38 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:52,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:52,449 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-28 10:13:52,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-28 10:13:52,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-28 10:13:52,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-28 10:13:52,450 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 40 states. [2018-09-28 10:13:53,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:53,450 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2018-09-28 10:13:53,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-28 10:13:53,450 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 116 [2018-09-28 10:13:53,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:53,451 INFO L225 Difference]: With dead ends: 123 [2018-09-28 10:13:53,451 INFO L226 Difference]: Without dead ends: 119 [2018-09-28 10:13:53,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-28 10:13:53,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-28 10:13:53,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-28 10:13:53,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-28 10:13:53,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-09-28 10:13:53,456 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2018-09-28 10:13:53,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:53,456 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-09-28 10:13:53,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-28 10:13:53,456 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-09-28 10:13:53,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-28 10:13:53,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:53,457 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 1, 1] [2018-09-28 10:13:53,457 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:53,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:53,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1037745747, now seen corresponding path program 24 times [2018-09-28 10:13:53,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:53,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:53,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:53,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:53,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:55,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:55,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:55,128 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:13:55,206 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-09-28 10:13:55,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:55,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:55,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:55,245 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:55,245 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-28 10:13:55,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-28 10:13:55,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-28 10:13:55,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-28 10:13:55,247 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 41 states. [2018-09-28 10:13:55,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:55,323 INFO L93 Difference]: Finished difference Result 125 states and 131 transitions. [2018-09-28 10:13:55,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-28 10:13:55,323 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 116 [2018-09-28 10:13:55,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:55,324 INFO L225 Difference]: With dead ends: 125 [2018-09-28 10:13:55,324 INFO L226 Difference]: Without dead ends: 121 [2018-09-28 10:13:55,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-28 10:13:55,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-28 10:13:55,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-28 10:13:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-28 10:13:55,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-09-28 10:13:55,329 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 116 [2018-09-28 10:13:55,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:55,330 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-09-28 10:13:55,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-28 10:13:55,330 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-09-28 10:13:55,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-28 10:13:55,330 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:55,330 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 1, 1, 1] [2018-09-28 10:13:55,331 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:55,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:55,331 INFO L82 PathProgramCache]: Analyzing trace with hash 308544265, now seen corresponding path program 38 times [2018-09-28 10:13:55,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:55,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:55,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:55,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:55,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:56,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 39 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:56,299 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:56,299 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-28 10:13:56,315 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:56,370 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:13:56,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:56,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 39 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:56,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:56,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-28 10:13:56,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-28 10:13:56,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-28 10:13:56,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-28 10:13:56,416 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 41 states. [2018-09-28 10:13:56,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:56,512 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2018-09-28 10:13:56,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-28 10:13:56,512 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 119 [2018-09-28 10:13:56,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:56,513 INFO L225 Difference]: With dead ends: 126 [2018-09-28 10:13:56,513 INFO L226 Difference]: Without dead ends: 122 [2018-09-28 10:13:56,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-28 10:13:56,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-28 10:13:56,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-28 10:13:56,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-28 10:13:56,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-09-28 10:13:56,516 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 119 [2018-09-28 10:13:56,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:56,517 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-09-28 10:13:56,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-28 10:13:56,517 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-09-28 10:13:56,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-28 10:13:56,518 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:56,518 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 1, 1] [2018-09-28 10:13:56,518 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:56,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:56,518 INFO L82 PathProgramCache]: Analyzing trace with hash 308544327, now seen corresponding path program 25 times [2018-09-28 10:13:56,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:56,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:56,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:56,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:56,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:56,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:57,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:57,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:57,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:57,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:57,366 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:57,367 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-28 10:13:57,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-28 10:13:57,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-28 10:13:57,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-28 10:13:57,368 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 42 states. [2018-09-28 10:13:57,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:57,565 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2018-09-28 10:13:57,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-28 10:13:57,566 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 119 [2018-09-28 10:13:57,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:57,567 INFO L225 Difference]: With dead ends: 128 [2018-09-28 10:13:57,567 INFO L226 Difference]: Without dead ends: 124 [2018-09-28 10:13:57,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-28 10:13:57,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-28 10:13:57,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-28 10:13:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-28 10:13:57,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2018-09-28 10:13:57,570 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 119 [2018-09-28 10:13:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:57,570 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2018-09-28 10:13:57,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-28 10:13:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2018-09-28 10:13:57,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-28 10:13:57,571 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:57,571 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 1, 1, 1] [2018-09-28 10:13:57,571 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:57,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:57,572 INFO L82 PathProgramCache]: Analyzing trace with hash 613624213, now seen corresponding path program 39 times [2018-09-28 10:13:57,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:57,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:57,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:57,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:57,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:58,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 40 proven. 2340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:58,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:58,214 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:58,223 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:13:58,318 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2018-09-28 10:13:58,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:58,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:59,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:59,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-28 10:13:59,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-28 10:13:59,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-28 10:13:59,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1763, Invalid=5043, Unknown=0, NotChecked=0, Total=6806 [2018-09-28 10:13:59,556 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 83 states. [2018-09-28 10:14:02,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:02,945 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2018-09-28 10:14:02,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-28 10:14:02,946 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 122 [2018-09-28 10:14:02,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:02,947 INFO L225 Difference]: With dead ends: 131 [2018-09-28 10:14:02,947 INFO L226 Difference]: Without dead ends: 127 [2018-09-28 10:14:02,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4759 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=8403, Invalid=18003, Unknown=0, NotChecked=0, Total=26406 [2018-09-28 10:14:02,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-28 10:14:02,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-28 10:14:02,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-28 10:14:02,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2018-09-28 10:14:02,953 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 122 [2018-09-28 10:14:02,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:02,953 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2018-09-28 10:14:02,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-28 10:14:02,953 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2018-09-28 10:14:02,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-28 10:14:02,954 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:02,954 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 1, 1, 1] [2018-09-28 10:14:02,954 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:02,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:02,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1099556745, now seen corresponding path program 40 times [2018-09-28 10:14:02,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:02,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:02,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:02,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:02,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:03,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 41 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:03,639 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:03,639 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-28 10:14:03,648 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:03,685 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:03,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:03,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:03,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 41 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:03,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:03,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-28 10:14:03,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-28 10:14:03,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-28 10:14:03,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-28 10:14:03,743 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 43 states. [2018-09-28 10:14:03,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:03,925 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2018-09-28 10:14:03,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-28 10:14:03,925 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 125 [2018-09-28 10:14:03,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:03,926 INFO L225 Difference]: With dead ends: 132 [2018-09-28 10:14:03,927 INFO L226 Difference]: Without dead ends: 128 [2018-09-28 10:14:03,927 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-28 10:14:03,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-28 10:14:03,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-28 10:14:03,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-28 10:14:03,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2018-09-28 10:14:03,931 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 125 [2018-09-28 10:14:03,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:03,931 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2018-09-28 10:14:03,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-28 10:14:03,931 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2018-09-28 10:14:03,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-28 10:14:03,932 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:03,932 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 1, 1] [2018-09-28 10:14:03,932 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:03,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:03,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1099556807, now seen corresponding path program 26 times [2018-09-28 10:14:03,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:03,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:03,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:03,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:03,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:04,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:04,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:04,747 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:04,785 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:04,785 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:04,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:04,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:04,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-28 10:14:04,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-28 10:14:04,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-28 10:14:04,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-28 10:14:04,828 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 44 states. [2018-09-28 10:14:05,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:05,304 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2018-09-28 10:14:05,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-28 10:14:05,304 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 125 [2018-09-28 10:14:05,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:05,305 INFO L225 Difference]: With dead ends: 134 [2018-09-28 10:14:05,305 INFO L226 Difference]: Without dead ends: 130 [2018-09-28 10:14:05,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-28 10:14:05,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-28 10:14:05,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-28 10:14:05,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-28 10:14:05,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2018-09-28 10:14:05,310 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 125 [2018-09-28 10:14:05,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:05,310 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2018-09-28 10:14:05,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-28 10:14:05,310 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2018-09-28 10:14:05,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-28 10:14:05,311 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:05,311 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 1, 1, 1] [2018-09-28 10:14:05,311 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:05,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:05,312 INFO L82 PathProgramCache]: Analyzing trace with hash -819137259, now seen corresponding path program 41 times [2018-09-28 10:14:05,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:05,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:05,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:05,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:05,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:06,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 42 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:06,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:06,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:06,804 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:06,873 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-28 10:14:06,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:06,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:06,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 42 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:06,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:06,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-28 10:14:06,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-28 10:14:06,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-28 10:14:06,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-28 10:14:06,932 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 44 states. [2018-09-28 10:14:07,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:07,704 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2018-09-28 10:14:07,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-28 10:14:07,705 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 128 [2018-09-28 10:14:07,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:07,706 INFO L225 Difference]: With dead ends: 135 [2018-09-28 10:14:07,706 INFO L226 Difference]: Without dead ends: 131 [2018-09-28 10:14:07,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-28 10:14:07,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-28 10:14:07,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-28 10:14:07,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-28 10:14:07,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-09-28 10:14:07,710 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 128 [2018-09-28 10:14:07,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:07,710 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-09-28 10:14:07,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-28 10:14:07,710 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-09-28 10:14:07,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-28 10:14:07,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:07,711 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 1, 1] [2018-09-28 10:14:07,711 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:07,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:07,712 INFO L82 PathProgramCache]: Analyzing trace with hash -819137197, now seen corresponding path program 27 times [2018-09-28 10:14:07,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:07,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:07,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:07,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:07,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:08,474 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:08,474 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:08,481 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:08,574 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 43 check-sat command(s) [2018-09-28 10:14:08,574 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:08,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:08,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:08,633 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:08,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-28 10:14:08,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-28 10:14:08,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-28 10:14:08,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-28 10:14:08,635 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 45 states. [2018-09-28 10:14:08,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:08,757 INFO L93 Difference]: Finished difference Result 137 states and 143 transitions. [2018-09-28 10:14:08,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-28 10:14:08,758 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 128 [2018-09-28 10:14:08,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:08,759 INFO L225 Difference]: With dead ends: 137 [2018-09-28 10:14:08,759 INFO L226 Difference]: Without dead ends: 133 [2018-09-28 10:14:08,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-28 10:14:08,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-28 10:14:08,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-28 10:14:08,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-28 10:14:08,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-09-28 10:14:08,764 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2018-09-28 10:14:08,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:08,764 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-09-28 10:14:08,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-28 10:14:08,764 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-09-28 10:14:08,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-28 10:14:08,764 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:08,765 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1] [2018-09-28 10:14:08,765 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:08,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:08,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1087532041, now seen corresponding path program 42 times [2018-09-28 10:14:08,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:08,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:08,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:08,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:08,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:09,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 43 proven. 2709 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:09,519 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:09,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:09,526 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:09,601 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-09-28 10:14:09,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:09,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:11,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:11,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-28 10:14:11,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-28 10:14:11,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-28 10:14:11,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2024, Invalid=5808, Unknown=0, NotChecked=0, Total=7832 [2018-09-28 10:14:11,473 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 89 states. [2018-09-28 10:14:15,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:15,079 INFO L93 Difference]: Finished difference Result 140 states and 147 transitions. [2018-09-28 10:14:15,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-28 10:14:15,079 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 131 [2018-09-28 10:14:15,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:15,080 INFO L225 Difference]: With dead ends: 140 [2018-09-28 10:14:15,081 INFO L226 Difference]: Without dead ends: 136 [2018-09-28 10:14:15,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5503 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9678, Invalid=20772, Unknown=0, NotChecked=0, Total=30450 [2018-09-28 10:14:15,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-28 10:14:15,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-28 10:14:15,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-28 10:14:15,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-09-28 10:14:15,085 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 131 [2018-09-28 10:14:15,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:15,086 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-09-28 10:14:15,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-28 10:14:15,086 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-09-28 10:14:15,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-28 10:14:15,086 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:15,086 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 1, 1, 1] [2018-09-28 10:14:15,086 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:15,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:15,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1730158741, now seen corresponding path program 43 times [2018-09-28 10:14:15,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:15,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:15,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:15,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:15,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 44 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:15,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:15,839 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:15,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:15,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 44 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:15,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:15,928 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-28 10:14:15,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-28 10:14:15,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-28 10:14:15,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-28 10:14:15,929 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 46 states. [2018-09-28 10:14:16,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:16,009 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2018-09-28 10:14:16,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-28 10:14:16,010 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 134 [2018-09-28 10:14:16,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:16,011 INFO L225 Difference]: With dead ends: 141 [2018-09-28 10:14:16,011 INFO L226 Difference]: Without dead ends: 137 [2018-09-28 10:14:16,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-28 10:14:16,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-28 10:14:16,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-28 10:14:16,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-28 10:14:16,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2018-09-28 10:14:16,015 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 134 [2018-09-28 10:14:16,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:16,016 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2018-09-28 10:14:16,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-28 10:14:16,016 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2018-09-28 10:14:16,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-28 10:14:16,016 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:16,016 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 1, 1] [2018-09-28 10:14:16,017 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:16,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:16,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1730158803, now seen corresponding path program 28 times [2018-09-28 10:14:16,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:16,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:16,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:16,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:16,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:17,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:17,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:17,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:17,064 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:17,104 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:17,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:17,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:17,145 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:17,146 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-28 10:14:17,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-28 10:14:17,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-28 10:14:17,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-28 10:14:17,146 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 47 states. [2018-09-28 10:14:17,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:17,220 INFO L93 Difference]: Finished difference Result 143 states and 149 transitions. [2018-09-28 10:14:17,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-28 10:14:17,224 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 134 [2018-09-28 10:14:17,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:17,225 INFO L225 Difference]: With dead ends: 143 [2018-09-28 10:14:17,225 INFO L226 Difference]: Without dead ends: 139 [2018-09-28 10:14:17,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-28 10:14:17,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-28 10:14:17,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-28 10:14:17,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-28 10:14:17,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2018-09-28 10:14:17,228 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 134 [2018-09-28 10:14:17,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:17,228 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2018-09-28 10:14:17,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-28 10:14:17,228 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2018-09-28 10:14:17,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-28 10:14:17,229 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:17,229 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 1, 1, 1] [2018-09-28 10:14:17,229 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:17,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:17,229 INFO L82 PathProgramCache]: Analyzing trace with hash -742027127, now seen corresponding path program 44 times [2018-09-28 10:14:17,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:17,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:17,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:17,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:17,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 45 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:18,032 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:18,032 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:18,039 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:18,080 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:18,080 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:18,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:18,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 45 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:18,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:18,139 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-28 10:14:18,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-28 10:14:18,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-28 10:14:18,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-28 10:14:18,140 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 47 states. [2018-09-28 10:14:18,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:18,480 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2018-09-28 10:14:18,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-28 10:14:18,480 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 137 [2018-09-28 10:14:18,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:18,481 INFO L225 Difference]: With dead ends: 144 [2018-09-28 10:14:18,481 INFO L226 Difference]: Without dead ends: 140 [2018-09-28 10:14:18,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-28 10:14:18,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-28 10:14:18,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-28 10:14:18,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-28 10:14:18,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2018-09-28 10:14:18,487 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 137 [2018-09-28 10:14:18,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:18,487 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2018-09-28 10:14:18,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-28 10:14:18,487 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2018-09-28 10:14:18,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-28 10:14:18,488 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:18,488 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1] [2018-09-28 10:14:18,488 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:18,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:18,489 INFO L82 PathProgramCache]: Analyzing trace with hash -742027065, now seen corresponding path program 29 times [2018-09-28 10:14:18,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:18,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:18,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:18,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:18,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:18,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:19,417 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:19,417 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:19,425 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:19,503 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-28 10:14:19,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:19,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:19,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:19,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-28 10:14:19,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-28 10:14:19,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-28 10:14:19,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-28 10:14:19,547 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 48 states. [2018-09-28 10:14:19,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:19,666 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2018-09-28 10:14:19,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-28 10:14:19,666 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 137 [2018-09-28 10:14:19,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:19,668 INFO L225 Difference]: With dead ends: 146 [2018-09-28 10:14:19,668 INFO L226 Difference]: Without dead ends: 142 [2018-09-28 10:14:19,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-28 10:14:19,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-28 10:14:19,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-28 10:14:19,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-28 10:14:19,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2018-09-28 10:14:19,673 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 137 [2018-09-28 10:14:19,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:19,673 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2018-09-28 10:14:19,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-28 10:14:19,674 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2018-09-28 10:14:19,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-28 10:14:19,674 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:19,674 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1] [2018-09-28 10:14:19,675 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:19,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:19,675 INFO L82 PathProgramCache]: Analyzing trace with hash 467971093, now seen corresponding path program 45 times [2018-09-28 10:14:19,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:19,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:19,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:19,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:19,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:19,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 46 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:20,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:20,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:20,492 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:20,925 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2018-09-28 10:14:20,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:20,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 46 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:20,967 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:20,967 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-28 10:14:20,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-28 10:14:20,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-28 10:14:20,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-28 10:14:20,968 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 48 states. [2018-09-28 10:14:21,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:21,037 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2018-09-28 10:14:21,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-28 10:14:21,037 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 140 [2018-09-28 10:14:21,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:21,039 INFO L225 Difference]: With dead ends: 147 [2018-09-28 10:14:21,039 INFO L226 Difference]: Without dead ends: 143 [2018-09-28 10:14:21,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-28 10:14:21,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-28 10:14:21,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-28 10:14:21,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-28 10:14:21,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-09-28 10:14:21,044 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 140 [2018-09-28 10:14:21,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:21,045 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-09-28 10:14:21,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-28 10:14:21,045 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-09-28 10:14:21,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-28 10:14:21,045 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:21,046 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1] [2018-09-28 10:14:21,046 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:21,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:21,046 INFO L82 PathProgramCache]: Analyzing trace with hash 467971155, now seen corresponding path program 30 times [2018-09-28 10:14:21,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:21,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:21,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:21,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:21,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:22,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:22,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:22,204 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:22,211 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:22,295 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-09-28 10:14:22,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:22,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:22,357 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:22,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-28 10:14:22,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-28 10:14:22,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-28 10:14:22,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-28 10:14:22,358 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 49 states. [2018-09-28 10:14:22,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:22,621 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2018-09-28 10:14:22,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-28 10:14:22,622 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 140 [2018-09-28 10:14:22,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:22,623 INFO L225 Difference]: With dead ends: 149 [2018-09-28 10:14:22,623 INFO L226 Difference]: Without dead ends: 145 [2018-09-28 10:14:22,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-28 10:14:22,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-28 10:14:22,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-28 10:14:22,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-28 10:14:22,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-09-28 10:14:22,629 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 140 [2018-09-28 10:14:22,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:22,629 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-09-28 10:14:22,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-28 10:14:22,629 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-09-28 10:14:22,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-28 10:14:22,630 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:22,630 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1] [2018-09-28 10:14:22,630 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:22,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:22,631 INFO L82 PathProgramCache]: Analyzing trace with hash -135572215, now seen corresponding path program 46 times [2018-09-28 10:14:22,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:22,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:22,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:22,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:22,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 47 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:23,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:23,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:23,506 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:23,547 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:23,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:23,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 3290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:25,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:25,501 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-28 10:14:25,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-28 10:14:25,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-28 10:14:25,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2400, Invalid=6912, Unknown=0, NotChecked=0, Total=9312 [2018-09-28 10:14:25,502 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 97 states. [2018-09-28 10:14:30,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:30,013 INFO L93 Difference]: Finished difference Result 152 states and 159 transitions. [2018-09-28 10:14:30,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-28 10:14:30,014 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 143 [2018-09-28 10:14:30,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:30,015 INFO L225 Difference]: With dead ends: 152 [2018-09-28 10:14:30,015 INFO L226 Difference]: Without dead ends: 148 [2018-09-28 10:14:30,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6579 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=11518, Invalid=24772, Unknown=0, NotChecked=0, Total=36290 [2018-09-28 10:14:30,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-28 10:14:30,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-28 10:14:30,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-28 10:14:30,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2018-09-28 10:14:30,020 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 143 [2018-09-28 10:14:30,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:30,021 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2018-09-28 10:14:30,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-28 10:14:30,021 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2018-09-28 10:14:30,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-28 10:14:30,022 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:30,022 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 1, 1, 1] [2018-09-28 10:14:30,022 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:30,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:30,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1561159787, now seen corresponding path program 47 times [2018-09-28 10:14:30,022 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:30,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:30,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:30,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:30,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 48 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:30,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:30,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:30,995 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:31,080 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-28 10:14:31,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:31,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 48 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:31,141 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:31,141 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-28 10:14:31,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-28 10:14:31,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-28 10:14:31,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-28 10:14:31,142 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 50 states. [2018-09-28 10:14:31,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:31,237 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2018-09-28 10:14:31,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-28 10:14:31,237 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 146 [2018-09-28 10:14:31,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:31,238 INFO L225 Difference]: With dead ends: 153 [2018-09-28 10:14:31,238 INFO L226 Difference]: Without dead ends: 149 [2018-09-28 10:14:31,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-28 10:14:31,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-28 10:14:31,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-28 10:14:31,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-28 10:14:31,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2018-09-28 10:14:31,243 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 146 [2018-09-28 10:14:31,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:31,243 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2018-09-28 10:14:31,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-28 10:14:31,243 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2018-09-28 10:14:31,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-28 10:14:31,243 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:31,244 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 1, 1] [2018-09-28 10:14:31,244 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:31,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:31,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1561159725, now seen corresponding path program 31 times [2018-09-28 10:14:31,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:31,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:31,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:31,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:31,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:32,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:32,391 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:32,391 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:32,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:32,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:32,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:32,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-28 10:14:32,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-28 10:14:32,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-28 10:14:32,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-28 10:14:32,487 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 51 states. [2018-09-28 10:14:32,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:32,614 INFO L93 Difference]: Finished difference Result 155 states and 161 transitions. [2018-09-28 10:14:32,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-28 10:14:32,615 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 146 [2018-09-28 10:14:32,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:32,616 INFO L225 Difference]: With dead ends: 155 [2018-09-28 10:14:32,616 INFO L226 Difference]: Without dead ends: 151 [2018-09-28 10:14:32,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-28 10:14:32,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-28 10:14:32,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-28 10:14:32,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-28 10:14:32,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-09-28 10:14:32,620 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 146 [2018-09-28 10:14:32,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:32,620 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-09-28 10:14:32,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-28 10:14:32,620 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-09-28 10:14:32,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-28 10:14:32,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:32,621 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 1, 1, 1] [2018-09-28 10:14:32,621 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:32,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:32,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1691072905, now seen corresponding path program 48 times [2018-09-28 10:14:32,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:32,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:32,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:32,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:32,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:32,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 49 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:33,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:33,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:33,515 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:33,605 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-09-28 10:14:33,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:33,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 0 proven. 3577 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:35,441 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:35,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-28 10:14:35,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-28 10:14:35,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-28 10:14:35,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2600, Invalid=7500, Unknown=0, NotChecked=0, Total=10100 [2018-09-28 10:14:35,443 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 101 states. [2018-09-28 10:14:40,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:40,319 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2018-09-28 10:14:40,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-28 10:14:40,320 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 149 [2018-09-28 10:14:40,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:40,321 INFO L225 Difference]: With dead ends: 158 [2018-09-28 10:14:40,321 INFO L226 Difference]: Without dead ends: 154 [2018-09-28 10:14:40,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7153 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=12498, Invalid=26904, Unknown=0, NotChecked=0, Total=39402 [2018-09-28 10:14:40,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-28 10:14:40,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-28 10:14:40,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-28 10:14:40,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2018-09-28 10:14:40,326 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 149 [2018-09-28 10:14:40,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:40,326 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2018-09-28 10:14:40,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-28 10:14:40,326 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2018-09-28 10:14:40,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-28 10:14:40,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:40,327 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 1, 1, 1] [2018-09-28 10:14:40,327 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:40,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:40,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1212030187, now seen corresponding path program 49 times [2018-09-28 10:14:40,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:40,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:40,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:40,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:40,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 50 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:41,254 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:41,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:41,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:41,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 50 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:41,353 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:41,354 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-28 10:14:41,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-28 10:14:41,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-28 10:14:41,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-28 10:14:41,355 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 52 states. [2018-09-28 10:14:41,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:41,491 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2018-09-28 10:14:41,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-28 10:14:41,491 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 152 [2018-09-28 10:14:41,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:41,492 INFO L225 Difference]: With dead ends: 159 [2018-09-28 10:14:41,493 INFO L226 Difference]: Without dead ends: 155 [2018-09-28 10:14:41,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-28 10:14:41,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-28 10:14:41,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-28 10:14:41,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-28 10:14:41,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-09-28 10:14:41,498 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 152 [2018-09-28 10:14:41,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:41,498 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-09-28 10:14:41,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-28 10:14:41,498 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-09-28 10:14:41,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-28 10:14:41,499 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:41,499 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 1, 1] [2018-09-28 10:14:41,499 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:41,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:41,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1212030125, now seen corresponding path program 32 times [2018-09-28 10:14:41,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:41,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:41,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:41,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:41,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:42,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:42,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:42,788 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:42,832 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:42,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:42,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:42,876 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:42,876 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-28 10:14:42,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-28 10:14:42,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-28 10:14:42,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-28 10:14:42,877 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 53 states. [2018-09-28 10:14:42,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:42,978 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2018-09-28 10:14:42,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-28 10:14:42,979 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 152 [2018-09-28 10:14:42,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:42,980 INFO L225 Difference]: With dead ends: 161 [2018-09-28 10:14:42,980 INFO L226 Difference]: Without dead ends: 157 [2018-09-28 10:14:42,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-28 10:14:42,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-28 10:14:42,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-28 10:14:42,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-28 10:14:42,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-09-28 10:14:42,986 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 152 [2018-09-28 10:14:42,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:42,986 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-09-28 10:14:42,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-28 10:14:42,986 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-09-28 10:14:42,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-28 10:14:42,987 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:42,987 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 1, 1, 1] [2018-09-28 10:14:42,987 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:42,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:42,988 INFO L82 PathProgramCache]: Analyzing trace with hash 200195593, now seen corresponding path program 50 times [2018-09-28 10:14:42,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:42,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:42,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:42,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:42,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 51 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:44,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:44,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:44,138 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:44,193 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:44,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:44,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:44,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 51 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:44,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:44,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-28 10:14:44,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-28 10:14:44,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-28 10:14:44,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-28 10:14:44,245 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 53 states. [2018-09-28 10:14:44,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:44,387 INFO L93 Difference]: Finished difference Result 162 states and 167 transitions. [2018-09-28 10:14:44,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-28 10:14:44,388 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 155 [2018-09-28 10:14:44,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:44,389 INFO L225 Difference]: With dead ends: 162 [2018-09-28 10:14:44,389 INFO L226 Difference]: Without dead ends: 158 [2018-09-28 10:14:44,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-28 10:14:44,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-28 10:14:44,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-28 10:14:44,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-28 10:14:44,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2018-09-28 10:14:44,392 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 155 [2018-09-28 10:14:44,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:44,393 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2018-09-28 10:14:44,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-28 10:14:44,393 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2018-09-28 10:14:44,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-28 10:14:44,393 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:44,394 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 1, 1] [2018-09-28 10:14:44,394 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:44,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:44,394 INFO L82 PathProgramCache]: Analyzing trace with hash 200195655, now seen corresponding path program 33 times [2018-09-28 10:14:44,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:44,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:44,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:44,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:44,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:45,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:45,417 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:45,417 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:45,427 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:45,522 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-28 10:14:45,523 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:45,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:45,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:45,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-28 10:14:45,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-28 10:14:45,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-28 10:14:45,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-28 10:14:45,579 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 54 states. [2018-09-28 10:14:45,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:45,729 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2018-09-28 10:14:45,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-28 10:14:45,729 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 155 [2018-09-28 10:14:45,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:45,730 INFO L225 Difference]: With dead ends: 164 [2018-09-28 10:14:45,730 INFO L226 Difference]: Without dead ends: 160 [2018-09-28 10:14:45,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-28 10:14:45,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-28 10:14:45,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-28 10:14:45,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-28 10:14:45,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2018-09-28 10:14:45,735 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 155 [2018-09-28 10:14:45,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:45,736 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2018-09-28 10:14:45,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-28 10:14:45,736 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2018-09-28 10:14:45,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-28 10:14:45,737 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:45,737 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 1, 1, 1] [2018-09-28 10:14:45,737 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:45,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:45,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1681224043, now seen corresponding path program 51 times [2018-09-28 10:14:45,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:45,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:45,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:45,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:45,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 52 proven. 3978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:46,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:46,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:46,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:46,913 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2018-09-28 10:14:46,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:46,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:49,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:49,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-28 10:14:49,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-28 10:14:49,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-28 10:14:49,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2915, Invalid=8427, Unknown=0, NotChecked=0, Total=11342 [2018-09-28 10:14:49,099 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 107 states. [2018-09-28 10:14:54,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:54,460 INFO L93 Difference]: Finished difference Result 167 states and 174 transitions. [2018-09-28 10:14:54,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-28 10:14:54,460 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 158 [2018-09-28 10:14:54,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:54,462 INFO L225 Difference]: With dead ends: 167 [2018-09-28 10:14:54,462 INFO L226 Difference]: Without dead ends: 163 [2018-09-28 10:14:54,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8059 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=14043, Invalid=30267, Unknown=0, NotChecked=0, Total=44310 [2018-09-28 10:14:54,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-28 10:14:54,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-28 10:14:54,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-28 10:14:54,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2018-09-28 10:14:54,467 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 158 [2018-09-28 10:14:54,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:54,468 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2018-09-28 10:14:54,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-28 10:14:54,468 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2018-09-28 10:14:54,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-28 10:14:54,469 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:54,469 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 1, 1, 1] [2018-09-28 10:14:54,469 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:54,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:54,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1730387319, now seen corresponding path program 52 times [2018-09-28 10:14:54,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:54,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:54,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:54,470 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:54,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:54,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:55,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 53 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:55,525 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:55,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:55,533 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:55,580 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:55,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:55,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:55,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 53 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:55,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:55,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-28 10:14:55,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-28 10:14:55,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-28 10:14:55,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-28 10:14:55,639 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand 55 states. [2018-09-28 10:14:55,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:55,797 INFO L93 Difference]: Finished difference Result 168 states and 173 transitions. [2018-09-28 10:14:55,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-28 10:14:55,797 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 161 [2018-09-28 10:14:55,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:55,799 INFO L225 Difference]: With dead ends: 168 [2018-09-28 10:14:55,799 INFO L226 Difference]: Without dead ends: 164 [2018-09-28 10:14:55,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-28 10:14:55,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-28 10:14:55,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-28 10:14:55,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-28 10:14:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2018-09-28 10:14:55,802 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 161 [2018-09-28 10:14:55,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:55,803 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2018-09-28 10:14:55,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-28 10:14:55,803 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2018-09-28 10:14:55,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-28 10:14:55,804 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:55,804 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 1, 1] [2018-09-28 10:14:55,804 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:55,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:55,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1730387257, now seen corresponding path program 34 times [2018-09-28 10:14:55,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:55,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:55,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:55,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:55,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:56,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:56,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:56,895 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:56,943 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:56,943 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:56,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:56,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:56,989 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:56,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-28 10:14:56,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-28 10:14:56,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-28 10:14:56,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-28 10:14:56,991 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 56 states. [2018-09-28 10:14:57,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:57,215 INFO L93 Difference]: Finished difference Result 170 states and 176 transitions. [2018-09-28 10:14:57,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-28 10:14:57,216 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 161 [2018-09-28 10:14:57,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:57,216 INFO L225 Difference]: With dead ends: 170 [2018-09-28 10:14:57,216 INFO L226 Difference]: Without dead ends: 166 [2018-09-28 10:14:57,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-28 10:14:57,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-09-28 10:14:57,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-09-28 10:14:57,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-09-28 10:14:57,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2018-09-28 10:14:57,221 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 161 [2018-09-28 10:14:57,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:57,222 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2018-09-28 10:14:57,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-28 10:14:57,222 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2018-09-28 10:14:57,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-28 10:14:57,223 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:57,223 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1] [2018-09-28 10:14:57,223 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:57,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:57,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1769694699, now seen corresponding path program 53 times [2018-09-28 10:14:57,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:57,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:57,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:57,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:57,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:58,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 54 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:58,493 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:58,493 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:58,502 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:58,600 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-28 10:14:58,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:58,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 54 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:58,649 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:58,649 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-28 10:14:58,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-28 10:14:58,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-28 10:14:58,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-28 10:14:58,650 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 56 states. [2018-09-28 10:14:58,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:58,746 INFO L93 Difference]: Finished difference Result 171 states and 176 transitions. [2018-09-28 10:14:58,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-28 10:14:58,747 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 164 [2018-09-28 10:14:58,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:58,748 INFO L225 Difference]: With dead ends: 171 [2018-09-28 10:14:58,748 INFO L226 Difference]: Without dead ends: 167 [2018-09-28 10:14:58,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-28 10:14:58,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-28 10:14:58,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-28 10:14:58,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-28 10:14:58,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2018-09-28 10:14:58,756 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 164 [2018-09-28 10:14:58,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:58,757 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2018-09-28 10:14:58,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-28 10:14:58,757 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2018-09-28 10:14:58,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-28 10:14:58,758 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:58,758 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 1, 1] [2018-09-28 10:14:58,758 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:58,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:58,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1769694637, now seen corresponding path program 35 times [2018-09-28 10:14:58,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:58,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:58,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:58,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:58,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:59,915 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:59,915 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:59,922 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:00,020 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-28 10:15:00,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:00,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:00,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:00,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-28 10:15:00,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-28 10:15:00,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-28 10:15:00,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-28 10:15:00,087 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 57 states. [2018-09-28 10:15:00,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:00,404 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2018-09-28 10:15:00,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-28 10:15:00,405 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 164 [2018-09-28 10:15:00,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:00,406 INFO L225 Difference]: With dead ends: 173 [2018-09-28 10:15:00,406 INFO L226 Difference]: Without dead ends: 169 [2018-09-28 10:15:00,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-28 10:15:00,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-28 10:15:00,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-28 10:15:00,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-28 10:15:00,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2018-09-28 10:15:00,411 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 164 [2018-09-28 10:15:00,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:00,411 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2018-09-28 10:15:00,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-28 10:15:00,411 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2018-09-28 10:15:00,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-09-28 10:15:00,412 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:00,412 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 1, 1, 1] [2018-09-28 10:15:00,412 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:00,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:00,413 INFO L82 PathProgramCache]: Analyzing trace with hash -249780471, now seen corresponding path program 54 times [2018-09-28 10:15:00,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:00,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:00,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:00,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:00,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 55 proven. 4455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:01,529 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:01,529 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:01,537 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:01,641 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2018-09-28 10:15:01,641 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:01,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 0 proven. 4510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:04,250 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:04,251 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-28 10:15:04,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-28 10:15:04,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-28 10:15:04,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3248, Invalid=9408, Unknown=0, NotChecked=0, Total=12656 [2018-09-28 10:15:04,252 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 113 states. [2018-09-28 10:15:10,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:10,118 INFO L93 Difference]: Finished difference Result 176 states and 183 transitions. [2018-09-28 10:15:10,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-28 10:15:10,118 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 167 [2018-09-28 10:15:10,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:10,119 INFO L225 Difference]: With dead ends: 176 [2018-09-28 10:15:10,119 INFO L226 Difference]: Without dead ends: 172 [2018-09-28 10:15:10,122 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9019 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=15678, Invalid=33828, Unknown=0, NotChecked=0, Total=49506 [2018-09-28 10:15:10,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-09-28 10:15:10,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-09-28 10:15:10,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-09-28 10:15:10,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2018-09-28 10:15:10,125 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 167 [2018-09-28 10:15:10,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:10,126 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2018-09-28 10:15:10,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-28 10:15:10,126 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2018-09-28 10:15:10,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-28 10:15:10,127 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:10,127 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 1, 1, 1] [2018-09-28 10:15:10,127 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:10,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:10,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1969751445, now seen corresponding path program 55 times [2018-09-28 10:15:10,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:10,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:10,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:10,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:10,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:10,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:11,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 56 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:11,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:11,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:11,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:11,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:11,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 56 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:11,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:11,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-28 10:15:11,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-28 10:15:11,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-28 10:15:11,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-28 10:15:11,489 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand 58 states. [2018-09-28 10:15:11,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:11,649 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2018-09-28 10:15:11,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-28 10:15:11,649 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 170 [2018-09-28 10:15:11,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:11,650 INFO L225 Difference]: With dead ends: 177 [2018-09-28 10:15:11,650 INFO L226 Difference]: Without dead ends: 173 [2018-09-28 10:15:11,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-28 10:15:11,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-28 10:15:11,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-28 10:15:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-28 10:15:11,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2018-09-28 10:15:11,654 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 170 [2018-09-28 10:15:11,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:11,654 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2018-09-28 10:15:11,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-28 10:15:11,655 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2018-09-28 10:15:11,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-28 10:15:11,655 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:11,655 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 56, 1, 1] [2018-09-28 10:15:11,655 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:11,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:11,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1969751507, now seen corresponding path program 36 times [2018-09-28 10:15:11,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:11,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:11,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:11,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:11,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:13,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:13,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:13,460 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:13,564 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2018-09-28 10:15:13,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:13,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:13,619 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:13,619 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-28 10:15:13,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-28 10:15:13,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-28 10:15:13,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-28 10:15:13,620 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 59 states. [2018-09-28 10:15:13,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:13,780 INFO L93 Difference]: Finished difference Result 179 states and 185 transitions. [2018-09-28 10:15:13,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-28 10:15:13,780 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 170 [2018-09-28 10:15:13,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:13,782 INFO L225 Difference]: With dead ends: 179 [2018-09-28 10:15:13,782 INFO L226 Difference]: Without dead ends: 175 [2018-09-28 10:15:13,782 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-28 10:15:13,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-28 10:15:13,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-28 10:15:13,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-28 10:15:13,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-09-28 10:15:13,786 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2018-09-28 10:15:13,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:13,786 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-09-28 10:15:13,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-28 10:15:13,786 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-09-28 10:15:13,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-28 10:15:13,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:13,787 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 56, 1, 1, 1] [2018-09-28 10:15:13,787 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:13,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:13,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1271428215, now seen corresponding path program 56 times [2018-09-28 10:15:13,787 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:13,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:13,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:13,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:13,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 57 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:14,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:14,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:14,991 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:15,040 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:15,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:15,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 57 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:15,089 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:15,089 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-28 10:15:15,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-28 10:15:15,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-28 10:15:15,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-28 10:15:15,090 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 59 states. [2018-09-28 10:15:15,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:15,266 INFO L93 Difference]: Finished difference Result 180 states and 185 transitions. [2018-09-28 10:15:15,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-28 10:15:15,266 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 173 [2018-09-28 10:15:15,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:15,267 INFO L225 Difference]: With dead ends: 180 [2018-09-28 10:15:15,267 INFO L226 Difference]: Without dead ends: 176 [2018-09-28 10:15:15,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-28 10:15:15,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-09-28 10:15:15,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-09-28 10:15:15,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-09-28 10:15:15,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2018-09-28 10:15:15,270 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 173 [2018-09-28 10:15:15,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:15,271 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2018-09-28 10:15:15,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-28 10:15:15,271 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2018-09-28 10:15:15,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-28 10:15:15,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:15,271 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 57, 1, 1] [2018-09-28 10:15:15,271 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:15,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:15,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1271428153, now seen corresponding path program 37 times [2018-09-28 10:15:15,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:15,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:15,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:15,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:15,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:16,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:16,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:16,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:16,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:16,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:16,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:16,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-28 10:15:16,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-28 10:15:16,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-28 10:15:16,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-28 10:15:16,628 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 60 states. [2018-09-28 10:15:16,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:16,737 INFO L93 Difference]: Finished difference Result 182 states and 188 transitions. [2018-09-28 10:15:16,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-28 10:15:16,738 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 173 [2018-09-28 10:15:16,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:16,739 INFO L225 Difference]: With dead ends: 182 [2018-09-28 10:15:16,739 INFO L226 Difference]: Without dead ends: 178 [2018-09-28 10:15:16,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-28 10:15:16,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-09-28 10:15:16,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-09-28 10:15:16,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-09-28 10:15:16,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2018-09-28 10:15:16,746 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 173 [2018-09-28 10:15:16,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:16,747 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2018-09-28 10:15:16,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-28 10:15:16,747 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2018-09-28 10:15:16,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-28 10:15:16,748 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:16,748 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 57, 1, 1, 1] [2018-09-28 10:15:16,748 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:16,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:16,748 INFO L82 PathProgramCache]: Analyzing trace with hash 200069397, now seen corresponding path program 57 times [2018-09-28 10:15:16,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:16,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:16,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:16,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:16,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:16,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 58 proven. 4959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:18,285 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:18,285 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:18,294 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:18,402 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2018-09-28 10:15:18,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:18,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:20,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:20,834 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-09-28 10:15:20,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-28 10:15:20,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-28 10:15:20,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3599, Invalid=10443, Unknown=0, NotChecked=0, Total=14042 [2018-09-28 10:15:20,835 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 119 states. [2018-09-28 10:15:27,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:27,310 INFO L93 Difference]: Finished difference Result 185 states and 192 transitions. [2018-09-28 10:15:27,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-28 10:15:27,310 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 176 [2018-09-28 10:15:27,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:27,311 INFO L225 Difference]: With dead ends: 185 [2018-09-28 10:15:27,311 INFO L226 Difference]: Without dead ends: 181 [2018-09-28 10:15:27,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10033 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=17403, Invalid=37587, Unknown=0, NotChecked=0, Total=54990 [2018-09-28 10:15:27,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-28 10:15:27,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-28 10:15:27,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-28 10:15:27,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-09-28 10:15:27,318 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 176 [2018-09-28 10:15:27,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:27,318 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-09-28 10:15:27,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-28 10:15:27,318 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-09-28 10:15:27,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-09-28 10:15:27,319 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:27,319 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 58, 1, 1, 1] [2018-09-28 10:15:27,320 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:27,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:27,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1145761783, now seen corresponding path program 58 times [2018-09-28 10:15:27,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:27,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:27,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:27,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:27,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 59 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:29,008 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:29,008 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:29,018 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:29,071 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:29,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:29,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 59 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:29,119 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:29,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-28 10:15:29,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-28 10:15:29,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-28 10:15:29,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-28 10:15:29,120 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 61 states. [2018-09-28 10:15:29,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:29,230 INFO L93 Difference]: Finished difference Result 186 states and 191 transitions. [2018-09-28 10:15:29,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-28 10:15:29,231 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 179 [2018-09-28 10:15:29,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:29,232 INFO L225 Difference]: With dead ends: 186 [2018-09-28 10:15:29,232 INFO L226 Difference]: Without dead ends: 182 [2018-09-28 10:15:29,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-28 10:15:29,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-09-28 10:15:29,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-09-28 10:15:29,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-09-28 10:15:29,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2018-09-28 10:15:29,238 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 179 [2018-09-28 10:15:29,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:29,239 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2018-09-28 10:15:29,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-28 10:15:29,239 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2018-09-28 10:15:29,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-09-28 10:15:29,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:29,240 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 59, 1, 1] [2018-09-28 10:15:29,240 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:29,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:29,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1145761721, now seen corresponding path program 38 times [2018-09-28 10:15:29,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:29,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:29,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:29,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:29,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:30,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:30,630 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:30,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:30,639 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:30,690 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:30,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:30,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:30,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:30,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-28 10:15:30,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-28 10:15:30,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-28 10:15:30,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-28 10:15:30,744 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 62 states. [2018-09-28 10:15:30,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:30,930 INFO L93 Difference]: Finished difference Result 188 states and 194 transitions. [2018-09-28 10:15:30,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-28 10:15:30,931 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 179 [2018-09-28 10:15:30,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:30,932 INFO L225 Difference]: With dead ends: 188 [2018-09-28 10:15:30,932 INFO L226 Difference]: Without dead ends: 184 [2018-09-28 10:15:30,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-28 10:15:30,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-09-28 10:15:30,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-09-28 10:15:30,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-09-28 10:15:30,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2018-09-28 10:15:30,935 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 179 [2018-09-28 10:15:30,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:30,936 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2018-09-28 10:15:30,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-28 10:15:30,936 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2018-09-28 10:15:30,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-28 10:15:30,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:30,936 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 59, 1, 1, 1] [2018-09-28 10:15:30,937 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:30,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:30,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1282737003, now seen corresponding path program 59 times [2018-09-28 10:15:30,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:30,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:30,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:30,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:30,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:30,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 60 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:32,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:32,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:32,267 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:32,378 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-28 10:15:32,379 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:32,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 60 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:32,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:32,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-28 10:15:32,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-28 10:15:32,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-28 10:15:32,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-28 10:15:32,434 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand 62 states. [2018-09-28 10:15:32,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:32,555 INFO L93 Difference]: Finished difference Result 189 states and 194 transitions. [2018-09-28 10:15:32,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-28 10:15:32,556 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 182 [2018-09-28 10:15:32,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:32,557 INFO L225 Difference]: With dead ends: 189 [2018-09-28 10:15:32,557 INFO L226 Difference]: Without dead ends: 185 [2018-09-28 10:15:32,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-28 10:15:32,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-28 10:15:32,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-28 10:15:32,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-28 10:15:32,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-09-28 10:15:32,562 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 182 [2018-09-28 10:15:32,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:32,562 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-09-28 10:15:32,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-28 10:15:32,562 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-09-28 10:15:32,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-28 10:15:32,563 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:32,563 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 60, 1, 1] [2018-09-28 10:15:32,563 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:32,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:32,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1282736941, now seen corresponding path program 39 times [2018-09-28 10:15:32,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:32,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:32,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:32,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:32,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:34,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:34,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:34,268 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:34,388 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 61 check-sat command(s) [2018-09-28 10:15:34,388 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:34,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:34,441 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:34,441 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-28 10:15:34,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-28 10:15:34,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-28 10:15:34,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-28 10:15:34,442 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 63 states. [2018-09-28 10:15:34,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:34,631 INFO L93 Difference]: Finished difference Result 191 states and 197 transitions. [2018-09-28 10:15:34,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-28 10:15:34,632 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 182 [2018-09-28 10:15:34,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:34,633 INFO L225 Difference]: With dead ends: 191 [2018-09-28 10:15:34,633 INFO L226 Difference]: Without dead ends: 187 [2018-09-28 10:15:34,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-28 10:15:34,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-28 10:15:34,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-28 10:15:34,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-28 10:15:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2018-09-28 10:15:34,638 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 182 [2018-09-28 10:15:34,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:34,638 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2018-09-28 10:15:34,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-28 10:15:34,639 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2018-09-28 10:15:34,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-09-28 10:15:34,639 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:34,639 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 60, 1, 1, 1] [2018-09-28 10:15:34,640 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:34,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:34,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1692584823, now seen corresponding path program 60 times [2018-09-28 10:15:34,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:34,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:34,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:34,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:34,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:36,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 61 proven. 5490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:36,075 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:36,075 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:36,084 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:36,203 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2018-09-28 10:15:36,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:36,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:39,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 0 proven. 5551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:39,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:39,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-09-28 10:15:39,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-28 10:15:39,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-28 10:15:39,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3968, Invalid=11532, Unknown=0, NotChecked=0, Total=15500 [2018-09-28 10:15:39,320 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand 125 states. [2018-09-28 10:15:46,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:46,465 INFO L93 Difference]: Finished difference Result 194 states and 201 transitions. [2018-09-28 10:15:46,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-28 10:15:46,465 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 185 [2018-09-28 10:15:46,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:46,466 INFO L225 Difference]: With dead ends: 194 [2018-09-28 10:15:46,466 INFO L226 Difference]: Without dead ends: 190 [2018-09-28 10:15:46,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11101 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=19218, Invalid=41544, Unknown=0, NotChecked=0, Total=60762 [2018-09-28 10:15:46,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-09-28 10:15:46,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-09-28 10:15:46,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-09-28 10:15:46,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2018-09-28 10:15:46,472 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 185 [2018-09-28 10:15:46,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:46,472 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2018-09-28 10:15:46,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-28 10:15:46,472 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2018-09-28 10:15:46,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-28 10:15:46,473 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:46,473 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 61, 1, 1, 1] [2018-09-28 10:15:46,473 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:46,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:46,474 INFO L82 PathProgramCache]: Analyzing trace with hash -876967915, now seen corresponding path program 61 times [2018-09-28 10:15:46,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:46,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:46,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:46,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:46,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:47,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 62 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:47,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:47,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:47,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:48,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 62 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:48,113 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:48,113 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-28 10:15:48,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-28 10:15:48,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-28 10:15:48,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-28 10:15:48,115 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 64 states. [2018-09-28 10:15:48,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:48,372 INFO L93 Difference]: Finished difference Result 195 states and 200 transitions. [2018-09-28 10:15:48,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-28 10:15:48,372 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 188 [2018-09-28 10:15:48,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:48,373 INFO L225 Difference]: With dead ends: 195 [2018-09-28 10:15:48,373 INFO L226 Difference]: Without dead ends: 191 [2018-09-28 10:15:48,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-28 10:15:48,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-28 10:15:48,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-28 10:15:48,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-28 10:15:48,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-09-28 10:15:48,378 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 188 [2018-09-28 10:15:48,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:48,379 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-09-28 10:15:48,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-28 10:15:48,379 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-09-28 10:15:48,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-28 10:15:48,380 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:48,380 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 62, 1, 1] [2018-09-28 10:15:48,380 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:48,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:48,380 INFO L82 PathProgramCache]: Analyzing trace with hash -876967853, now seen corresponding path program 40 times [2018-09-28 10:15:48,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:48,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:48,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:48,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:48,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:50,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:50,006 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:50,006 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:50,012 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:50,067 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:50,068 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:50,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:50,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:50,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-28 10:15:50,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-28 10:15:50,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-28 10:15:50,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-28 10:15:50,126 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 65 states. [2018-09-28 10:15:50,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:50,324 INFO L93 Difference]: Finished difference Result 197 states and 203 transitions. [2018-09-28 10:15:50,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-28 10:15:50,324 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 188 [2018-09-28 10:15:50,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:50,325 INFO L225 Difference]: With dead ends: 197 [2018-09-28 10:15:50,326 INFO L226 Difference]: Without dead ends: 193 [2018-09-28 10:15:50,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-28 10:15:50,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-28 10:15:50,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-28 10:15:50,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-28 10:15:50,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2018-09-28 10:15:50,331 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 188 [2018-09-28 10:15:50,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:50,331 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2018-09-28 10:15:50,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-28 10:15:50,331 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2018-09-28 10:15:50,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-09-28 10:15:50,332 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:50,332 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 62, 1, 1, 1] [2018-09-28 10:15:50,332 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:50,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:50,333 INFO L82 PathProgramCache]: Analyzing trace with hash 536344841, now seen corresponding path program 62 times [2018-09-28 10:15:50,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:50,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:50,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:50,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:50,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:51,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 63 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:51,908 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:51,908 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:51,916 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:51,971 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:51,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:51,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 63 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:52,029 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:52,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-28 10:15:52,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-28 10:15:52,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-28 10:15:52,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-28 10:15:52,031 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand 65 states. [2018-09-28 10:15:52,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:52,193 INFO L93 Difference]: Finished difference Result 198 states and 203 transitions. [2018-09-28 10:15:52,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-28 10:15:52,194 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 191 [2018-09-28 10:15:52,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:52,195 INFO L225 Difference]: With dead ends: 198 [2018-09-28 10:15:52,195 INFO L226 Difference]: Without dead ends: 194 [2018-09-28 10:15:52,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-28 10:15:52,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-09-28 10:15:52,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2018-09-28 10:15:52,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-09-28 10:15:52,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 196 transitions. [2018-09-28 10:15:52,199 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 196 transitions. Word has length 191 [2018-09-28 10:15:52,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:52,199 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 196 transitions. [2018-09-28 10:15:52,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-28 10:15:52,199 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 196 transitions. [2018-09-28 10:15:52,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-09-28 10:15:52,200 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:52,200 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 63, 1, 1] [2018-09-28 10:15:52,200 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:52,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:52,201 INFO L82 PathProgramCache]: Analyzing trace with hash 536344903, now seen corresponding path program 41 times [2018-09-28 10:15:52,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:52,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:52,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:52,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:52,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:54,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:54,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:54,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:54,121 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:54,236 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-09-28 10:15:54,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:54,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:54,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:54,295 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:54,295 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-28 10:15:54,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-28 10:15:54,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-28 10:15:54,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-28 10:15:54,296 INFO L87 Difference]: Start difference. First operand 194 states and 196 transitions. Second operand 66 states. [2018-09-28 10:15:54,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:54,492 INFO L93 Difference]: Finished difference Result 200 states and 206 transitions. [2018-09-28 10:15:54,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-28 10:15:54,493 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 191 [2018-09-28 10:15:54,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:54,493 INFO L225 Difference]: With dead ends: 200 [2018-09-28 10:15:54,494 INFO L226 Difference]: Without dead ends: 196 [2018-09-28 10:15:54,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-28 10:15:54,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-09-28 10:15:54,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-09-28 10:15:54,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-09-28 10:15:54,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2018-09-28 10:15:54,498 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 191 [2018-09-28 10:15:54,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:54,498 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2018-09-28 10:15:54,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-28 10:15:54,498 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2018-09-28 10:15:54,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-28 10:15:54,499 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:54,499 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 63, 1, 1, 1] [2018-09-28 10:15:54,499 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:54,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:54,499 INFO L82 PathProgramCache]: Analyzing trace with hash 972256149, now seen corresponding path program 63 times [2018-09-28 10:15:54,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:54,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:54,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:54,500 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:54,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 64 proven. 6048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:56,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:56,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:56,028 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:56,151 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2018-09-28 10:15:56,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:56,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:59,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:59,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-09-28 10:15:59,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-28 10:15:59,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-28 10:15:59,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4355, Invalid=12675, Unknown=0, NotChecked=0, Total=17030 [2018-09-28 10:15:59,474 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 131 states. [2018-09-28 10:16:07,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:07,250 INFO L93 Difference]: Finished difference Result 203 states and 210 transitions. [2018-09-28 10:16:07,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-28 10:16:07,250 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 194 [2018-09-28 10:16:07,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:07,251 INFO L225 Difference]: With dead ends: 203 [2018-09-28 10:16:07,251 INFO L226 Difference]: Without dead ends: 199 [2018-09-28 10:16:07,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12223 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=21123, Invalid=45699, Unknown=0, NotChecked=0, Total=66822 [2018-09-28 10:16:07,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-28 10:16:07,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-28 10:16:07,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-28 10:16:07,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2018-09-28 10:16:07,256 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 194 [2018-09-28 10:16:07,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:07,256 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2018-09-28 10:16:07,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-28 10:16:07,256 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2018-09-28 10:16:07,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-09-28 10:16:07,257 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:07,257 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 64, 1, 1, 1] [2018-09-28 10:16:07,257 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:07,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:07,258 INFO L82 PathProgramCache]: Analyzing trace with hash -775070327, now seen corresponding path program 64 times [2018-09-28 10:16:07,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:07,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:07,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:07,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:07,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 65 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:09,205 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:09,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:09,212 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:16:09,269 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:16:09,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:09,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:09,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 65 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:09,363 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:09,364 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-28 10:16:09,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-28 10:16:09,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-28 10:16:09,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-28 10:16:09,365 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 67 states. [2018-09-28 10:16:09,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:09,488 INFO L93 Difference]: Finished difference Result 204 states and 209 transitions. [2018-09-28 10:16:09,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-28 10:16:09,488 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 197 [2018-09-28 10:16:09,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:09,489 INFO L225 Difference]: With dead ends: 204 [2018-09-28 10:16:09,489 INFO L226 Difference]: Without dead ends: 200 [2018-09-28 10:16:09,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-28 10:16:09,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-09-28 10:16:09,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-09-28 10:16:09,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-09-28 10:16:09,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2018-09-28 10:16:09,495 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 197 [2018-09-28 10:16:09,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:09,495 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2018-09-28 10:16:09,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-28 10:16:09,495 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2018-09-28 10:16:09,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-09-28 10:16:09,496 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:09,496 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 65, 1, 1] [2018-09-28 10:16:09,496 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:09,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:09,497 INFO L82 PathProgramCache]: Analyzing trace with hash -775070265, now seen corresponding path program 42 times [2018-09-28 10:16:09,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:09,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:09,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:09,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:09,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:09,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:11,116 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:11,116 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:11,123 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:16:11,252 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 66 check-sat command(s) [2018-09-28 10:16:11,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:11,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:11,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:11,326 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:11,326 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-28 10:16:11,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-28 10:16:11,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-28 10:16:11,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-28 10:16:11,327 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 68 states. [2018-09-28 10:16:11,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:11,532 INFO L93 Difference]: Finished difference Result 206 states and 212 transitions. [2018-09-28 10:16:11,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-28 10:16:11,533 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 197 [2018-09-28 10:16:11,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:11,534 INFO L225 Difference]: With dead ends: 206 [2018-09-28 10:16:11,534 INFO L226 Difference]: Without dead ends: 202 [2018-09-28 10:16:11,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-28 10:16:11,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-09-28 10:16:11,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-09-28 10:16:11,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-09-28 10:16:11,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 204 transitions. [2018-09-28 10:16:11,539 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 204 transitions. Word has length 197 [2018-09-28 10:16:11,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:11,540 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 204 transitions. [2018-09-28 10:16:11,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-28 10:16:11,540 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 204 transitions. [2018-09-28 10:16:11,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-28 10:16:11,541 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:11,541 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 65, 1, 1, 1] [2018-09-28 10:16:11,541 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:11,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:11,542 INFO L82 PathProgramCache]: Analyzing trace with hash -374489323, now seen corresponding path program 65 times [2018-09-28 10:16:11,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:11,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:11,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:11,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:11,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:13,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 66 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:13,253 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:13,253 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:13,260 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:16:13,388 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-28 10:16:13,388 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:13,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 66 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:13,446 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:13,446 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-28 10:16:13,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-28 10:16:13,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-28 10:16:13,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-28 10:16:13,447 INFO L87 Difference]: Start difference. First operand 202 states and 204 transitions. Second operand 68 states. [2018-09-28 10:16:13,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:13,635 INFO L93 Difference]: Finished difference Result 207 states and 212 transitions. [2018-09-28 10:16:13,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-28 10:16:13,635 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 200 [2018-09-28 10:16:13,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:13,636 INFO L225 Difference]: With dead ends: 207 [2018-09-28 10:16:13,636 INFO L226 Difference]: Without dead ends: 203 [2018-09-28 10:16:13,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-28 10:16:13,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-28 10:16:13,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-28 10:16:13,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-28 10:16:13,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2018-09-28 10:16:13,642 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 200 [2018-09-28 10:16:13,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:13,642 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2018-09-28 10:16:13,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-28 10:16:13,642 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2018-09-28 10:16:13,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-28 10:16:13,643 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:13,643 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 66, 1, 1] [2018-09-28 10:16:13,644 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:13,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:13,644 INFO L82 PathProgramCache]: Analyzing trace with hash -374489261, now seen corresponding path program 43 times [2018-09-28 10:16:13,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:13,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:13,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:13,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:13,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:15,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:15,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:15,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:15,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:15,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:15,927 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:15,927 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-28 10:16:15,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-28 10:16:15,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-28 10:16:15,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-28 10:16:15,928 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 69 states. [2018-09-28 10:16:16,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:16,085 INFO L93 Difference]: Finished difference Result 209 states and 215 transitions. [2018-09-28 10:16:16,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-28 10:16:16,085 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 200 [2018-09-28 10:16:16,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:16,086 INFO L225 Difference]: With dead ends: 209 [2018-09-28 10:16:16,086 INFO L226 Difference]: Without dead ends: 205 [2018-09-28 10:16:16,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-28 10:16:16,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-28 10:16:16,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-28 10:16:16,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-28 10:16:16,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-09-28 10:16:16,091 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 200 [2018-09-28 10:16:16,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:16,092 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-09-28 10:16:16,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-28 10:16:16,092 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-09-28 10:16:16,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-09-28 10:16:16,092 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:16,092 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 66, 1, 1, 1] [2018-09-28 10:16:16,093 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:16,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:16,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1915052553, now seen corresponding path program 66 times [2018-09-28 10:16:16,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:16,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:16,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:16,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:16,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 67 proven. 6633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:17,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:17,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:17,779 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:16:17,909 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-09-28 10:16:17,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:17,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 0 proven. 6700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:21,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:21,504 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-09-28 10:16:21,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-28 10:16:21,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-28 10:16:21,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4760, Invalid=13872, Unknown=0, NotChecked=0, Total=18632 [2018-09-28 10:16:21,506 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 137 states. [2018-09-28 10:16:30,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:30,264 INFO L93 Difference]: Finished difference Result 212 states and 219 transitions. [2018-09-28 10:16:30,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-28 10:16:30,265 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 203 [2018-09-28 10:16:30,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:30,265 INFO L225 Difference]: With dead ends: 212 [2018-09-28 10:16:30,265 INFO L226 Difference]: Without dead ends: 208 [2018-09-28 10:16:30,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13399 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=23118, Invalid=50052, Unknown=0, NotChecked=0, Total=73170 [2018-09-28 10:16:30,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-09-28 10:16:30,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-09-28 10:16:30,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-09-28 10:16:30,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 210 transitions. [2018-09-28 10:16:30,270 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 210 transitions. Word has length 203 [2018-09-28 10:16:30,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:30,270 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 210 transitions. [2018-09-28 10:16:30,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-28 10:16:30,270 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 210 transitions. [2018-09-28 10:16:30,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-28 10:16:30,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:30,271 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 67, 1, 1, 1] [2018-09-28 10:16:30,271 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:30,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:30,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1281452693, now seen corresponding path program 67 times [2018-09-28 10:16:30,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:30,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:30,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:30,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:30,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:31,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 68 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:31,999 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:31,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:32,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:32,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 68 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:32,124 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:32,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-28 10:16:32,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-28 10:16:32,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-28 10:16:32,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-28 10:16:32,126 INFO L87 Difference]: Start difference. First operand 208 states and 210 transitions. Second operand 70 states. [2018-09-28 10:16:32,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:32,264 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2018-09-28 10:16:32,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-28 10:16:32,264 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 206 [2018-09-28 10:16:32,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:32,265 INFO L225 Difference]: With dead ends: 213 [2018-09-28 10:16:32,265 INFO L226 Difference]: Without dead ends: 209 [2018-09-28 10:16:32,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-28 10:16:32,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-28 10:16:32,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-28 10:16:32,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-28 10:16:32,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2018-09-28 10:16:32,269 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 206 [2018-09-28 10:16:32,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:32,270 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2018-09-28 10:16:32,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-28 10:16:32,270 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2018-09-28 10:16:32,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-28 10:16:32,270 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:32,270 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 68, 1, 1] [2018-09-28 10:16:32,271 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:32,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:32,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1281452755, now seen corresponding path program 44 times [2018-09-28 10:16:32,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:32,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:32,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:32,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:32,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:34,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:34,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:34,052 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:16:34,059 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:16:34,118 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:16:34,119 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:34,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:34,176 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:34,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-28 10:16:34,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-28 10:16:34,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-28 10:16:34,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-28 10:16:34,177 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 71 states. [2018-09-28 10:16:34,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:34,406 INFO L93 Difference]: Finished difference Result 215 states and 221 transitions. [2018-09-28 10:16:34,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-28 10:16:34,407 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 206 [2018-09-28 10:16:34,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:34,407 INFO L225 Difference]: With dead ends: 215 [2018-09-28 10:16:34,407 INFO L226 Difference]: Without dead ends: 211 [2018-09-28 10:16:34,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-28 10:16:34,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-28 10:16:34,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-28 10:16:34,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-28 10:16:34,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-09-28 10:16:34,412 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 206 [2018-09-28 10:16:34,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:34,412 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-09-28 10:16:34,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-28 10:16:34,412 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-09-28 10:16:34,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-09-28 10:16:34,413 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:34,413 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 68, 1, 1, 1] [2018-09-28 10:16:34,413 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:34,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:34,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2089289353, now seen corresponding path program 68 times [2018-09-28 10:16:34,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:34,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:34,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:34,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:34,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 69 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:36,342 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:36,342 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 [2018-09-28 10:16:36,349 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:16:36,425 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:16:36,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:36,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:36,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 69 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:36,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:36,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-28 10:16:36,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-28 10:16:36,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-28 10:16:36,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-28 10:16:36,514 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 71 states. [2018-09-28 10:16:36,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:36,739 INFO L93 Difference]: Finished difference Result 216 states and 221 transitions. [2018-09-28 10:16:36,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-28 10:16:36,739 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 209 [2018-09-28 10:16:36,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:36,740 INFO L225 Difference]: With dead ends: 216 [2018-09-28 10:16:36,740 INFO L226 Difference]: Without dead ends: 212 [2018-09-28 10:16:36,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-28 10:16:36,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-09-28 10:16:36,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2018-09-28 10:16:36,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-09-28 10:16:36,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 214 transitions. [2018-09-28 10:16:36,744 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 214 transitions. Word has length 209 [2018-09-28 10:16:36,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:36,744 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 214 transitions. [2018-09-28 10:16:36,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-28 10:16:36,744 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 214 transitions. [2018-09-28 10:16:36,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-09-28 10:16:36,745 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:36,745 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 69, 1, 1] [2018-09-28 10:16:36,745 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:36,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:36,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2089289415, now seen corresponding path program 45 times [2018-09-28 10:16:36,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:36,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:36,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:36,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:36,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 7107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:38,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:38,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:16:38,587 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:16:38,728 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-28 10:16:38,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:38,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 7107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:38,790 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:38,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-28 10:16:38,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-28 10:16:38,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-28 10:16:38,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-28 10:16:38,791 INFO L87 Difference]: Start difference. First operand 212 states and 214 transitions. Second operand 72 states. [2018-09-28 10:16:39,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:39,031 INFO L93 Difference]: Finished difference Result 218 states and 224 transitions. [2018-09-28 10:16:39,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-28 10:16:39,032 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 209 [2018-09-28 10:16:39,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:39,033 INFO L225 Difference]: With dead ends: 218 [2018-09-28 10:16:39,033 INFO L226 Difference]: Without dead ends: 214 [2018-09-28 10:16:39,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-28 10:16:39,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-09-28 10:16:39,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2018-09-28 10:16:39,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-09-28 10:16:39,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2018-09-28 10:16:39,037 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 209 [2018-09-28 10:16:39,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:39,037 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2018-09-28 10:16:39,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-28 10:16:39,038 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2018-09-28 10:16:39,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-28 10:16:39,038 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:39,038 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 69, 1, 1, 1] [2018-09-28 10:16:39,038 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:39,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:39,038 INFO L82 PathProgramCache]: Analyzing trace with hash -645499371, now seen corresponding path program 69 times [2018-09-28 10:16:39,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:39,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:39,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:39,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:39,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 70 proven. 7245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:41,150 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:41,151 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:16:41,158 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:16:41,299 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 71 check-sat command(s) [2018-09-28 10:16:41,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:41,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-28 10:16:44,257 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-28 10:16:44,458 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:44,458 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-28 10:16:44,463 WARN L206 ceAbstractionStarter]: Timeout [2018-09-28 10:16:44,464 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.09 10:16:44 BoogieIcfgContainer [2018-09-28 10:16:44,464 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-28 10:16:44,464 INFO L168 Benchmark]: Toolchain (without parser) took 236036.03 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 231.2 MB). Free memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: -138.9 MB). Peak memory consumption was 92.3 MB. Max. memory is 7.1 GB. [2018-09-28 10:16:44,466 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:16:44,466 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.47 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:16:44,466 INFO L168 Benchmark]: Boogie Preprocessor took 21.08 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:16:44,467 INFO L168 Benchmark]: RCFGBuilder took 337.02 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-28 10:16:44,467 INFO L168 Benchmark]: TraceAbstraction took 235628.37 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 231.2 MB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -160.0 MB). Peak memory consumption was 71.2 MB. Max. memory is 7.1 GB. [2018-09-28 10:16:44,469 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 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.47 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 21.08 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 337.02 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 235628.37 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 231.2 MB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -160.0 MB). Peak memory consumption was 71.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 30]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 30). Cancelled while BasicCegarLoop was analyzing trace of length 213 with TraceHistMax 70, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 134 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 235.5s OverallTime, 116 OverallIterations, 70 TraceHistogramMax, 89.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 667 SDtfs, 2487 SDslu, 11223 SDs, 0 SdLazy, 12781 SolverSat, 1111 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17913 GetRequests, 11381 SyntacticMatches, 0 SemanticMatches, 6532 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108474 ImplicationChecksByTransitivity, 192.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=214occurred in iteration=115, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 115 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 7.0s SatisfiabilityAnalysisTime, 127.4s InterpolantComputationTime, 24537 NumberOfCodeBlocks, 24537 NumberOfCodeBlocksAsserted, 2247 NumberOfCheckSat, 24309 ConstructedInterpolants, 0 QuantifiedInterpolants, 10237847 SizeOfPredicates, 0 NumberOfNonLiveVariables, 29108 ConjunctsInSsa, 4195 ConjunctsInUnsatCore, 228 InterpolantComputations, 2 PerfectInterpolantSequences, 4013/558041 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/HiddenEqualityWithBranches.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-28_10-16-44-477.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEqualityWithBranches.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-28_10-16-44-477.csv Completed graceful shutdown