java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2eb0a67 [2018-10-03 09:17:36,113 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 09:17:36,115 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 09:17:36,126 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-03 09:17:36,126 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-03 09:17:36,127 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-03 09:17:36,131 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-03 09:17:36,133 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-03 09:17:36,134 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-03 09:17:36,135 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-03 09:17:36,136 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-03 09:17:36,177 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-03 09:17:36,199 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 09:17:36,199 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 09:17:36,200 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 09:17:36,200 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 09:17:36,201 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 09:17:36,201 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 09:17:36,201 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 09:17:36,201 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 09:17:36,201 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 09:17:36,202 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 09:17:36,202 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 09:17:36,202 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 09:17:36,202 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 09:17:36,202 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 09:17:36,203 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 09:17:36,203 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 09:17:36,203 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 09:17:36,203 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 09:17:36,203 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 09:17:36,204 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 09:17:36,204 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 09:17:36,204 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 09:17:36,204 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 09:17:36,204 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 09:17:36,205 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 09:17:36,205 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 09:17:36,205 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 09:17:36,205 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 09:17:36,205 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 09:17:36,206 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 09:17:36,206 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-03 09:17:36,260 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 09:17:36,275 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 09:17:36,281 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 09:17:36,283 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 09:17:36,284 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 09:17:36,284 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl [2018-10-03 09:17:36,285 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl' [2018-10-03 09:17:36,336 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 09:17:36,339 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 09:17:36,340 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 09:17:36,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 09:17:36,340 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 09:17:36,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:17:36" (1/1) ... [2018-10-03 09:17:36,376 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:17:36" (1/1) ... [2018-10-03 09:17:36,381 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-03 09:17:36,381 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-03 09:17:36,381 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-03 09:17:36,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 09:17:36,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 09:17:36,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 09:17:36,385 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 09:17:36,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:17:36" (1/1) ... [2018-10-03 09:17:36,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:17:36" (1/1) ... [2018-10-03 09:17:36,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:17:36" (1/1) ... [2018-10-03 09:17:36,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:17:36" (1/1) ... [2018-10-03 09:17:36,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:17:36" (1/1) ... [2018-10-03 09:17:36,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:17:36" (1/1) ... [2018-10-03 09:17:36,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:17:36" (1/1) ... [2018-10-03 09:17:36,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 09:17:36,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 09:17:36,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 09:17:36,411 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 09:17:36,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:17:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 09:17:36,487 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-03 09:17:36,488 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-03 09:17:36,488 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-03 09:17:36,767 INFO L337 CfgBuilder]: Using library mode [2018-10-03 09:17:36,768 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 09:17:36 BoogieIcfgContainer [2018-10-03 09:17:36,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 09:17:36,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 09:17:36,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 09:17:36,775 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 09:17:36,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:17:36" (1/2) ... [2018-10-03 09:17:36,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49fa4042 and model type HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 09:17:36, skipping insertion in model container [2018-10-03 09:17:36,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 09:17:36" (2/2) ... [2018-10-03 09:17:36,778 INFO L112 eAbstractionObserver]: Analyzing ICFG HiddenEqualityWithBranches.bpl [2018-10-03 09:17:36,786 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 09:17:36,794 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 09:17:36,840 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 09:17:36,841 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 09:17:36,841 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 09:17:36,842 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 09:17:36,842 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 09:17:36,842 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 09:17:36,842 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 09:17:36,842 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 09:17:36,843 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 09:17:36,858 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-03 09:17:36,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-10-03 09:17:36,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:36,865 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-10-03 09:17:36,867 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:36,873 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:36,873 INFO L82 PathProgramCache]: Analyzing trace with hash 979, now seen corresponding path program 1 times [2018-10-03 09:17:36,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:36,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:36,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:36,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:36,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:36,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:37,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:37,036 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 09:17:37,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-03 09:17:37,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 09:17:37,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 09:17:37,053 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:37,055 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-03 09:17:37,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:37,141 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-10-03 09:17:37,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 09:17:37,145 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-10-03 09:17:37,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:37,182 INFO L225 Difference]: With dead ends: 17 [2018-10-03 09:17:37,182 INFO L226 Difference]: Without dead ends: 7 [2018-10-03 09:17:37,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-03 09:17:37,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-03 09:17:37,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-03 09:17:37,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-03 09:17:37,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2018-10-03 09:17:37,259 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 9 transitions. Word has length 2 [2018-10-03 09:17:37,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:37,260 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 9 transitions. [2018-10-03 09:17:37,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 09:17:37,260 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 9 transitions. [2018-10-03 09:17:37,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-03 09:17:37,261 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:37,261 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-03 09:17:37,261 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:37,262 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:37,262 INFO L82 PathProgramCache]: Analyzing trace with hash 28757385, now seen corresponding path program 1 times [2018-10-03 09:17:37,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:37,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:37,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:37,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:37,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:37,317 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 09:17:37,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-03 09:17:37,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 09:17:37,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 09:17:37,319 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:37,319 INFO L87 Difference]: Start difference. First operand 7 states and 9 transitions. Second operand 3 states. [2018-10-03 09:17:37,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:37,357 INFO L93 Difference]: Finished difference Result 12 states and 17 transitions. [2018-10-03 09:17:37,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 09:17:37,358 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-10-03 09:17:37,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:37,358 INFO L225 Difference]: With dead ends: 12 [2018-10-03 09:17:37,358 INFO L226 Difference]: Without dead ends: 8 [2018-10-03 09:17:37,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-03 09:17:37,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-03 09:17:37,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-03 09:17:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-03 09:17:37,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-10-03 09:17:37,369 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-10-03 09:17:37,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:37,369 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-10-03 09:17:37,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 09:17:37,370 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-10-03 09:17:37,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-03 09:17:37,370 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:37,370 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-03 09:17:37,371 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:37,371 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:37,371 INFO L82 PathProgramCache]: Analyzing trace with hash 28757447, now seen corresponding path program 1 times [2018-10-03 09:17:37,371 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:37,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:37,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:37,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:37,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:37,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:37,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:37,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:37,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:37,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:37,549 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:37,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-10-03 09:17:37,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 09:17:37,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 09:17:37,550 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:37,551 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 4 states. [2018-10-03 09:17:37,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:37,590 INFO L93 Difference]: Finished difference Result 14 states and 20 transitions. [2018-10-03 09:17:37,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 09:17:37,591 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-10-03 09:17:37,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:37,591 INFO L225 Difference]: With dead ends: 14 [2018-10-03 09:17:37,592 INFO L226 Difference]: Without dead ends: 10 [2018-10-03 09:17:37,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 2 [2018-10-03 09:17:37,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-03 09:17:37,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-03 09:17:37,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-03 09:17:37,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-10-03 09:17:37,596 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 5 [2018-10-03 09:17:37,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:37,596 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-10-03 09:17:37,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 09:17:37,597 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-10-03 09:17:37,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-03 09:17:37,597 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:37,597 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2018-10-03 09:17:37,598 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:37,598 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:37,598 INFO L82 PathProgramCache]: Analyzing trace with hash 2014203669, now seen corresponding path program 1 times [2018-10-03 09:17:37,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:37,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:37,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:37,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:37,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:37,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:37,662 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:37,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:37,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:37,739 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:37,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-03 09:17:37,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 09:17:37,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 09:17:37,740 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:37,740 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2018-10-03 09:17:37,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:37,773 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2018-10-03 09:17:37,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 09:17:37,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-10-03 09:17:37,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:37,774 INFO L225 Difference]: With dead ends: 15 [2018-10-03 09:17:37,774 INFO L226 Difference]: Without dead ends: 11 [2018-10-03 09:17:37,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 2 [2018-10-03 09:17:37,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-03 09:17:37,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-03 09:17:37,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-03 09:17:37,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2018-10-03 09:17:37,779 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2018-10-03 09:17:37,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:37,779 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2018-10-03 09:17:37,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 09:17:37,779 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2018-10-03 09:17:37,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-03 09:17:37,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:37,780 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1] [2018-10-03 09:17:37,780 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:37,781 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:37,781 INFO L82 PathProgramCache]: Analyzing trace with hash 2014203731, now seen corresponding path program 2 times [2018-10-03 09:17:37,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:37,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:37,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:37,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:37,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:37,848 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:37,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:37,863 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:17:37,885 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:17:37,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:37,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:38,106 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:38,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-03 09:17:38,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 09:17:38,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 09:17:38,107 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:38,107 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 5 states. [2018-10-03 09:17:38,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:38,168 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-10-03 09:17:38,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 09:17:38,169 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-03 09:17:38,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:38,170 INFO L225 Difference]: With dead ends: 17 [2018-10-03 09:17:38,170 INFO L226 Difference]: Without dead ends: 13 [2018-10-03 09:17:38,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 3 [2018-10-03 09:17:38,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-03 09:17:38,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-03 09:17:38,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-03 09:17:38,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2018-10-03 09:17:38,174 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2018-10-03 09:17:38,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:38,174 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2018-10-03 09:17:38,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 09:17:38,175 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2018-10-03 09:17:38,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 09:17:38,175 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:38,175 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1] [2018-10-03 09:17:38,176 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:38,176 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:38,176 INFO L82 PathProgramCache]: Analyzing trace with hash 154849801, now seen corresponding path program 2 times [2018-10-03 09:17:38,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:38,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:38,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:38,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:38,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:38,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:38,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:38,312 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:38,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:17:38,354 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:17:38,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:38,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:38,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:38,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:38,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-03 09:17:38,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 09:17:38,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 09:17:38,434 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:38,434 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 5 states. [2018-10-03 09:17:38,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:38,475 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2018-10-03 09:17:38,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 09:17:38,476 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-10-03 09:17:38,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:38,477 INFO L225 Difference]: With dead ends: 18 [2018-10-03 09:17:38,477 INFO L226 Difference]: Without dead ends: 14 [2018-10-03 09:17:38,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 3 [2018-10-03 09:17:38,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-03 09:17:38,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-03 09:17:38,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-03 09:17:38,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-03 09:17:38,482 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-10-03 09:17:38,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:38,483 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-03 09:17:38,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 09:17:38,483 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-03 09:17:38,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 09:17:38,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:38,484 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1] [2018-10-03 09:17:38,484 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:38,484 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:38,485 INFO L82 PathProgramCache]: Analyzing trace with hash 154849863, now seen corresponding path program 3 times [2018-10-03 09:17:38,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:38,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:38,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:38,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:38,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:38,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:38,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:38,573 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:38,583 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:17:38,610 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-03 09:17:38,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:38,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:38,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:38,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-03 09:17:38,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 09:17:38,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 09:17:38,765 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:38,765 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2018-10-03 09:17:38,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:38,831 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2018-10-03 09:17:38,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 09:17:38,832 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-10-03 09:17:38,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:38,833 INFO L225 Difference]: With dead ends: 20 [2018-10-03 09:17:38,833 INFO L226 Difference]: Without dead ends: 16 [2018-10-03 09:17:38,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 4 [2018-10-03 09:17:38,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-03 09:17:38,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-03 09:17:38,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-03 09:17:38,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-03 09:17:38,837 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2018-10-03 09:17:38,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:38,837 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-03 09:17:38,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 09:17:38,837 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-03 09:17:38,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-03 09:17:38,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:38,838 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1] [2018-10-03 09:17:38,839 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:38,839 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:38,839 INFO L82 PathProgramCache]: Analyzing trace with hash 336984725, now seen corresponding path program 3 times [2018-10-03 09:17:38,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:38,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:38,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:38,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:38,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:38,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:38,934 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:38,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:38,935 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:38,944 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:17:38,955 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-03 09:17:38,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:38,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:39,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:39,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-10-03 09:17:39,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 09:17:39,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 09:17:39,092 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:39,092 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 11 states. [2018-10-03 09:17:39,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:39,756 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2018-10-03 09:17:39,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 09:17:39,756 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-10-03 09:17:39,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:39,757 INFO L225 Difference]: With dead ends: 23 [2018-10-03 09:17:39,757 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 09:17:39,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 10 [2018-10-03 09:17:39,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 09:17:39,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-03 09:17:39,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-03 09:17:39,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-10-03 09:17:39,762 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2018-10-03 09:17:39,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:39,762 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-10-03 09:17:39,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 09:17:39,762 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-10-03 09:17:39,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 09:17:39,763 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:39,763 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1] [2018-10-03 09:17:39,764 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:39,764 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:39,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1774810761, now seen corresponding path program 4 times [2018-10-03 09:17:39,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:39,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:39,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:39,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:39,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:39,888 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:39,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:39,902 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:17:39,924 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:17:39,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:39,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:40,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:40,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 09:17:40,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 09:17:40,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 09:17:40,007 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:40,007 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2018-10-03 09:17:40,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:40,037 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-10-03 09:17:40,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 09:17:40,037 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-10-03 09:17:40,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:40,038 INFO L225 Difference]: With dead ends: 24 [2018-10-03 09:17:40,038 INFO L226 Difference]: Without dead ends: 20 [2018-10-03 09:17:40,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 5 [2018-10-03 09:17:40,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-03 09:17:40,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-03 09:17:40,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 09:17:40,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-03 09:17:40,043 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-10-03 09:17:40,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:40,044 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-03 09:17:40,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 09:17:40,044 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-03 09:17:40,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 09:17:40,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:40,045 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1] [2018-10-03 09:17:40,045 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:40,046 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:40,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1774810823, now seen corresponding path program 4 times [2018-10-03 09:17:40,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:40,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:40,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:40,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:40,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:40,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:40,153 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:40,153 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:40,167 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:17:40,179 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:17:40,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:40,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:40,254 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:40,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:40,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 09:17:40,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 09:17:40,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 09:17:40,281 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:40,282 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2018-10-03 09:17:40,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:40,348 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2018-10-03 09:17:40,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 09:17:40,348 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-10-03 09:17:40,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:40,349 INFO L225 Difference]: With dead ends: 26 [2018-10-03 09:17:40,349 INFO L226 Difference]: Without dead ends: 22 [2018-10-03 09:17:40,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 6 [2018-10-03 09:17:40,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-03 09:17:40,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-03 09:17:40,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 09:17:40,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-10-03 09:17:40,358 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2018-10-03 09:17:40,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:40,358 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-10-03 09:17:40,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 09:17:40,358 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-10-03 09:17:40,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-03 09:17:40,359 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:40,359 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1] [2018-10-03 09:17:40,360 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:40,360 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:40,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1953561067, now seen corresponding path program 5 times [2018-10-03 09:17:40,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:40,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:40,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:40,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:40,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:40,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:40,456 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:40,466 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:17:40,497 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 09:17:40,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:40,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:40,573 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:40,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:40,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 09:17:40,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 09:17:40,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 09:17:40,598 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:40,598 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 8 states. [2018-10-03 09:17:40,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:40,633 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-10-03 09:17:40,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 09:17:40,633 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-10-03 09:17:40,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:40,635 INFO L225 Difference]: With dead ends: 27 [2018-10-03 09:17:40,635 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 09:17:40,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 6 [2018-10-03 09:17:40,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 09:17:40,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-03 09:17:40,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-03 09:17:40,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-10-03 09:17:40,641 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2018-10-03 09:17:40,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:40,641 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-10-03 09:17:40,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 09:17:40,641 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-10-03 09:17:40,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-03 09:17:40,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:40,642 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1] [2018-10-03 09:17:40,643 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:40,643 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:40,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1953561005, now seen corresponding path program 5 times [2018-10-03 09:17:40,643 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:40,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:40,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:40,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:40,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:40,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:40,924 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:40,934 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:17:40,952 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 09:17:40,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:40,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:41,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:41,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 09:17:41,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 09:17:41,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 09:17:41,101 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:41,101 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 9 states. [2018-10-03 09:17:41,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:41,164 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2018-10-03 09:17:41,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 09:17:41,164 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2018-10-03 09:17:41,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:41,165 INFO L225 Difference]: With dead ends: 29 [2018-10-03 09:17:41,165 INFO L226 Difference]: Without dead ends: 25 [2018-10-03 09:17:41,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 7 [2018-10-03 09:17:41,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-03 09:17:41,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-03 09:17:41,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-03 09:17:41,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-03 09:17:41,169 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2018-10-03 09:17:41,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:41,169 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-03 09:17:41,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 09:17:41,170 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-03 09:17:41,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-03 09:17:41,170 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:41,171 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1] [2018-10-03 09:17:41,171 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:41,171 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:41,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1729447159, now seen corresponding path program 6 times [2018-10-03 09:17:41,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:41,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:41,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:41,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:41,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:41,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:41,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:41,298 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:17:41,312 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 09:17:41,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:41,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:41,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:41,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-10-03 09:17:41,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 09:17:41,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 09:17:41,496 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:41,496 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 17 states. [2018-10-03 09:17:41,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:41,884 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2018-10-03 09:17:41,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 09:17:41,885 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 23 [2018-10-03 09:17:41,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:41,886 INFO L225 Difference]: With dead ends: 32 [2018-10-03 09:17:41,886 INFO L226 Difference]: Without dead ends: 28 [2018-10-03 09:17:41,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 16 [2018-10-03 09:17:41,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-03 09:17:41,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-03 09:17:41,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 09:17:41,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-03 09:17:41,891 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-10-03 09:17:41,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:41,892 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-03 09:17:41,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 09:17:41,892 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-03 09:17:41,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-03 09:17:41,893 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:41,893 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1] [2018-10-03 09:17:41,893 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:41,893 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:41,893 INFO L82 PathProgramCache]: Analyzing trace with hash 468808085, now seen corresponding path program 7 times [2018-10-03 09:17:41,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:41,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:41,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:41,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:41,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:41,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:41,995 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:42,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:42,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:42,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:42,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 09:17:42,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 09:17:42,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 09:17:42,134 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:42,134 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 10 states. [2018-10-03 09:17:42,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:42,181 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-10-03 09:17:42,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 09:17:42,182 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2018-10-03 09:17:42,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:42,183 INFO L225 Difference]: With dead ends: 33 [2018-10-03 09:17:42,183 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 09:17:42,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 8 [2018-10-03 09:17:42,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 09:17:42,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-03 09:17:42,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-03 09:17:42,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-10-03 09:17:42,189 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2018-10-03 09:17:42,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:42,189 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-10-03 09:17:42,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 09:17:42,190 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-10-03 09:17:42,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-03 09:17:42,190 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:42,190 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1] [2018-10-03 09:17:42,191 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:42,191 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:42,191 INFO L82 PathProgramCache]: Analyzing trace with hash 468808147, now seen corresponding path program 6 times [2018-10-03 09:17:42,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:42,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:42,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:42,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:42,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:42,314 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:42,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:42,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:42,323 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:17:42,341 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-03 09:17:42,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:42,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:42,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:42,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 09:17:42,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 09:17:42,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 09:17:42,439 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:42,439 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 11 states. [2018-10-03 09:17:42,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:42,494 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-10-03 09:17:42,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 09:17:42,495 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2018-10-03 09:17:42,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:42,496 INFO L225 Difference]: With dead ends: 35 [2018-10-03 09:17:42,497 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 09:17:42,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 9 [2018-10-03 09:17:42,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 09:17:42,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-03 09:17:42,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-03 09:17:42,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-03 09:17:42,502 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2018-10-03 09:17:42,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:42,503 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-03 09:17:42,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 09:17:42,503 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-03 09:17:42,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-03 09:17:42,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:42,504 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1] [2018-10-03 09:17:42,504 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:42,504 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:42,505 INFO L82 PathProgramCache]: Analyzing trace with hash -970547319, now seen corresponding path program 8 times [2018-10-03 09:17:42,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:42,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:42,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:42,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:42,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:42,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:42,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:42,677 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:17:42,718 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:17:42,719 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:42,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:42,910 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:42,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 09:17:42,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 09:17:42,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 09:17:42,910 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:42,911 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 11 states. [2018-10-03 09:17:42,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:42,939 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2018-10-03 09:17:42,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 09:17:42,939 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-10-03 09:17:42,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:42,941 INFO L225 Difference]: With dead ends: 36 [2018-10-03 09:17:42,941 INFO L226 Difference]: Without dead ends: 32 [2018-10-03 09:17:42,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 9 [2018-10-03 09:17:42,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-03 09:17:42,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-03 09:17:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 09:17:42,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-10-03 09:17:42,947 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-10-03 09:17:42,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:42,961 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-10-03 09:17:42,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 09:17:42,962 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-10-03 09:17:42,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-03 09:17:42,964 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:42,964 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1] [2018-10-03 09:17:42,964 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:42,965 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:42,965 INFO L82 PathProgramCache]: Analyzing trace with hash -970547257, now seen corresponding path program 7 times [2018-10-03 09:17:42,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:42,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:42,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:42,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:42,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:43,184 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:43,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:43,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:43,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:43,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:43,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:43,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 09:17:43,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 09:17:43,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 09:17:43,336 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:43,336 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 12 states. [2018-10-03 09:17:43,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:43,391 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2018-10-03 09:17:43,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 09:17:43,391 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2018-10-03 09:17:43,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:43,392 INFO L225 Difference]: With dead ends: 38 [2018-10-03 09:17:43,392 INFO L226 Difference]: Without dead ends: 34 [2018-10-03 09:17:43,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 10 [2018-10-03 09:17:43,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-03 09:17:43,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-03 09:17:43,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 09:17:43,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-10-03 09:17:43,397 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2018-10-03 09:17:43,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:43,397 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-10-03 09:17:43,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 09:17:43,398 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-10-03 09:17:43,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-03 09:17:43,398 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:43,398 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1] [2018-10-03 09:17:43,399 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:43,399 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:43,399 INFO L82 PathProgramCache]: Analyzing trace with hash 146095381, now seen corresponding path program 9 times [2018-10-03 09:17:43,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:43,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:43,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:43,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:43,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:43,764 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:43,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:43,764 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:43,771 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:17:43,922 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-03 09:17:43,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:43,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:44,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:44,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-10-03 09:17:44,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 09:17:44,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 09:17:44,293 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:44,293 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 23 states. [2018-10-03 09:17:44,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:44,663 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2018-10-03 09:17:44,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 09:17:44,664 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2018-10-03 09:17:44,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:44,665 INFO L225 Difference]: With dead ends: 41 [2018-10-03 09:17:44,665 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 09:17:44,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 22 [2018-10-03 09:17:44,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 09:17:44,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-03 09:17:44,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-03 09:17:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-10-03 09:17:44,671 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2018-10-03 09:17:44,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:44,671 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-10-03 09:17:44,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 09:17:44,671 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-10-03 09:17:44,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-03 09:17:44,672 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:44,672 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1] [2018-10-03 09:17:44,672 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:44,672 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:44,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1527063561, now seen corresponding path program 10 times [2018-10-03 09:17:44,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:44,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:44,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:44,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:44,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:44,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:44,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:44,848 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:17:44,876 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:17:44,877 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:44,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:45,265 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:45,265 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-10-03 09:17:45,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-03 09:17:45,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-03 09:17:45,266 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:45,266 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 25 states. [2018-10-03 09:17:45,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:45,630 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2018-10-03 09:17:45,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 09:17:45,630 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 35 [2018-10-03 09:17:45,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:45,631 INFO L225 Difference]: With dead ends: 44 [2018-10-03 09:17:45,632 INFO L226 Difference]: Without dead ends: 40 [2018-10-03 09:17:45,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 24 [2018-10-03 09:17:45,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-03 09:17:45,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-03 09:17:45,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-03 09:17:45,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-10-03 09:17:45,637 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2018-10-03 09:17:45,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:45,638 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-10-03 09:17:45,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-03 09:17:45,638 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-10-03 09:17:45,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-03 09:17:45,639 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:45,639 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1] [2018-10-03 09:17:45,639 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:45,639 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:45,639 INFO L82 PathProgramCache]: Analyzing trace with hash 458385557, now seen corresponding path program 11 times [2018-10-03 09:17:45,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:45,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:45,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:45,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:45,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:45,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:45,784 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:45,792 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:17:45,879 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-03 09:17:45,879 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:45,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:46,143 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:46,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-03 09:17:46,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 09:17:46,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 09:17:46,144 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:46,144 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 14 states. [2018-10-03 09:17:46,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:46,212 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2018-10-03 09:17:46,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 09:17:46,213 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2018-10-03 09:17:46,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:46,214 INFO L225 Difference]: With dead ends: 45 [2018-10-03 09:17:46,214 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 09:17:46,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.0s impTime 12 [2018-10-03 09:17:46,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 09:17:46,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-03 09:17:46,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-03 09:17:46,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-10-03 09:17:46,219 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2018-10-03 09:17:46,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:46,220 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-10-03 09:17:46,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 09:17:46,220 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-10-03 09:17:46,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-03 09:17:46,220 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:46,221 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1] [2018-10-03 09:17:46,221 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:46,221 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:46,221 INFO L82 PathProgramCache]: Analyzing trace with hash 458385619, now seen corresponding path program 8 times [2018-10-03 09:17:46,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:46,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:46,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:46,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:46,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:46,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:46,537 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:46,544 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:17:46,560 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:17:46,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:46,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:46,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:46,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-03 09:17:46,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 09:17:46,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 09:17:46,705 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:46,705 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 15 states. [2018-10-03 09:17:46,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:46,794 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2018-10-03 09:17:46,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 09:17:46,795 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2018-10-03 09:17:46,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:46,795 INFO L225 Difference]: With dead ends: 47 [2018-10-03 09:17:46,795 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 09:17:46,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 13 [2018-10-03 09:17:46,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 09:17:46,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-03 09:17:46,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-03 09:17:46,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-10-03 09:17:46,800 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2018-10-03 09:17:46,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:46,801 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-10-03 09:17:46,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 09:17:46,801 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-10-03 09:17:46,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-03 09:17:46,801 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:46,802 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1] [2018-10-03 09:17:46,802 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:46,802 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:46,802 INFO L82 PathProgramCache]: Analyzing trace with hash 2064533641, now seen corresponding path program 12 times [2018-10-03 09:17:46,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:46,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:46,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:46,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:46,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:47,593 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:47,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:47,601 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:17:47,621 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-03 09:17:47,621 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:47,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:48,362 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:48,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:48,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-10-03 09:17:48,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 09:17:48,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 09:17:48,383 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:48,383 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 29 states. [2018-10-03 09:17:49,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:49,035 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2018-10-03 09:17:49,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 09:17:49,037 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 41 [2018-10-03 09:17:49,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:49,038 INFO L225 Difference]: With dead ends: 50 [2018-10-03 09:17:49,038 INFO L226 Difference]: Without dead ends: 46 [2018-10-03 09:17:49,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.3s impTime 28 [2018-10-03 09:17:49,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-03 09:17:49,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-03 09:17:49,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-03 09:17:49,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-10-03 09:17:49,043 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2018-10-03 09:17:49,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:49,043 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-10-03 09:17:49,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 09:17:49,044 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-10-03 09:17:49,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-03 09:17:49,044 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:49,044 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1] [2018-10-03 09:17:49,044 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:49,045 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:49,045 INFO L82 PathProgramCache]: Analyzing trace with hash 591459349, now seen corresponding path program 13 times [2018-10-03 09:17:49,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:49,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:49,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:49,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:49,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:49,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:49,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:49,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:49,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:49,549 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:49,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:49,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-03 09:17:49,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 09:17:49,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 09:17:49,573 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:49,573 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2018-10-03 09:17:49,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:49,611 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2018-10-03 09:17:49,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 09:17:49,612 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-10-03 09:17:49,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:49,613 INFO L225 Difference]: With dead ends: 51 [2018-10-03 09:17:49,613 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 09:17:49,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 14 [2018-10-03 09:17:49,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 09:17:49,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-03 09:17:49,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-03 09:17:49,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2018-10-03 09:17:49,619 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2018-10-03 09:17:49,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:49,620 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2018-10-03 09:17:49,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 09:17:49,620 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2018-10-03 09:17:49,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-03 09:17:49,620 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:49,621 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1] [2018-10-03 09:17:49,621 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:49,621 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:49,621 INFO L82 PathProgramCache]: Analyzing trace with hash 591459411, now seen corresponding path program 9 times [2018-10-03 09:17:49,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:49,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:49,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:49,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:49,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:49,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:49,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:49,848 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:17:49,872 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-03 09:17:49,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:49,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:50,003 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:50,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:50,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-03 09:17:50,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 09:17:50,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 09:17:50,025 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:50,026 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 17 states. [2018-10-03 09:17:50,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:50,090 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2018-10-03 09:17:50,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 09:17:50,090 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2018-10-03 09:17:50,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:50,091 INFO L225 Difference]: With dead ends: 53 [2018-10-03 09:17:50,091 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 09:17:50,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 15 [2018-10-03 09:17:50,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 09:17:50,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-03 09:17:50,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-03 09:17:50,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-10-03 09:17:50,097 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2018-10-03 09:17:50,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:50,098 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-10-03 09:17:50,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 09:17:50,098 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-10-03 09:17:50,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-03 09:17:50,099 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:50,099 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1] [2018-10-03 09:17:50,099 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:50,100 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:50,100 INFO L82 PathProgramCache]: Analyzing trace with hash -2083910391, now seen corresponding path program 14 times [2018-10-03 09:17:50,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:50,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:50,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:50,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:50,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:50,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:50,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:50,334 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:17:50,355 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:17:50,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:50,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:50,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:50,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-03 09:17:50,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 09:17:50,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 09:17:50,463 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:50,463 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 17 states. [2018-10-03 09:17:50,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:50,512 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2018-10-03 09:17:50,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 09:17:50,513 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2018-10-03 09:17:50,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:50,514 INFO L225 Difference]: With dead ends: 54 [2018-10-03 09:17:50,514 INFO L226 Difference]: Without dead ends: 50 [2018-10-03 09:17:50,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 15 [2018-10-03 09:17:50,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-03 09:17:50,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-03 09:17:50,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-03 09:17:50,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-10-03 09:17:50,518 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-10-03 09:17:50,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:50,518 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-10-03 09:17:50,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 09:17:50,519 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-10-03 09:17:50,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-03 09:17:50,519 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:50,519 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1] [2018-10-03 09:17:50,519 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:50,519 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:50,519 INFO L82 PathProgramCache]: Analyzing trace with hash -2083910329, now seen corresponding path program 10 times [2018-10-03 09:17:50,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:50,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:50,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:50,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:50,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:50,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:50,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:50,722 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:17:50,755 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:17:50,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:50,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:50,873 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:50,895 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:50,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-03 09:17:50,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 09:17:50,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 09:17:50,896 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:50,896 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 18 states. [2018-10-03 09:17:50,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:50,964 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2018-10-03 09:17:50,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 09:17:50,964 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2018-10-03 09:17:50,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:50,965 INFO L225 Difference]: With dead ends: 56 [2018-10-03 09:17:50,965 INFO L226 Difference]: Without dead ends: 52 [2018-10-03 09:17:50,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 16 [2018-10-03 09:17:50,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-03 09:17:50,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-03 09:17:50,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-03 09:17:50,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-10-03 09:17:50,969 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2018-10-03 09:17:50,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:50,969 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-10-03 09:17:50,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 09:17:50,970 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-10-03 09:17:50,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-03 09:17:50,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:50,970 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1] [2018-10-03 09:17:50,970 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:50,970 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:50,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1979244437, now seen corresponding path program 15 times [2018-10-03 09:17:50,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:50,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:50,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:50,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:50,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:50,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:51,138 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:51,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:51,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:51,147 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:17:51,173 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-10-03 09:17:51,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:51,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:51,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:51,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-10-03 09:17:51,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 09:17:51,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 09:17:51,485 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:51,485 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 35 states. [2018-10-03 09:17:52,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:52,034 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2018-10-03 09:17:52,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 09:17:52,035 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 50 [2018-10-03 09:17:52,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:52,036 INFO L225 Difference]: With dead ends: 59 [2018-10-03 09:17:52,036 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 09:17:52,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime 34 [2018-10-03 09:17:52,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 09:17:52,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-03 09:17:52,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-03 09:17:52,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-10-03 09:17:52,040 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2018-10-03 09:17:52,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:52,040 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-10-03 09:17:52,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 09:17:52,041 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-10-03 09:17:52,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-03 09:17:52,041 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:52,041 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1] [2018-10-03 09:17:52,042 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:52,042 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:52,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1933545079, now seen corresponding path program 16 times [2018-10-03 09:17:52,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:52,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:52,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:52,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:52,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:52,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:52,260 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:52,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:52,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:52,268 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:17:52,286 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:17:52,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:52,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:52,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:52,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-03 09:17:52,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 09:17:52,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 09:17:52,406 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:52,406 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 19 states. [2018-10-03 09:17:52,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:52,443 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2018-10-03 09:17:52,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 09:17:52,444 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2018-10-03 09:17:52,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:52,444 INFO L225 Difference]: With dead ends: 60 [2018-10-03 09:17:52,445 INFO L226 Difference]: Without dead ends: 56 [2018-10-03 09:17:52,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 17 [2018-10-03 09:17:52,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-03 09:17:52,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-03 09:17:52,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-03 09:17:52,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-03 09:17:52,449 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-10-03 09:17:52,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:52,449 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-03 09:17:52,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 09:17:52,449 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-03 09:17:52,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-03 09:17:52,449 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:52,449 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1] [2018-10-03 09:17:52,450 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:52,450 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:52,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1933545017, now seen corresponding path program 11 times [2018-10-03 09:17:52,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:52,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:52,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:52,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:52,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:52,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:53,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:53,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:53,264 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:17:53,297 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-03 09:17:53,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:53,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:53,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:53,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-03 09:17:53,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 09:17:53,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 09:17:53,553 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:53,553 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 20 states. [2018-10-03 09:17:53,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:53,630 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2018-10-03 09:17:53,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 09:17:53,630 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2018-10-03 09:17:53,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:53,631 INFO L225 Difference]: With dead ends: 62 [2018-10-03 09:17:53,631 INFO L226 Difference]: Without dead ends: 58 [2018-10-03 09:17:53,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 18 [2018-10-03 09:17:53,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-03 09:17:53,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-03 09:17:53,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-03 09:17:53,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-10-03 09:17:53,634 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2018-10-03 09:17:53,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:53,634 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-10-03 09:17:53,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 09:17:53,635 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-10-03 09:17:53,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-03 09:17:53,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:53,635 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1] [2018-10-03 09:17:53,636 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:53,636 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:53,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1861364501, now seen corresponding path program 17 times [2018-10-03 09:17:53,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:53,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:53,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:53,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:53,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:53,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:53,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:53,961 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:17:53,991 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-03 09:17:53,991 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:53,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:54,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:54,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-03 09:17:54,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 09:17:54,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 09:17:54,136 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:54,136 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 20 states. [2018-10-03 09:17:54,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:54,175 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2018-10-03 09:17:54,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 09:17:54,175 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2018-10-03 09:17:54,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:54,176 INFO L225 Difference]: With dead ends: 63 [2018-10-03 09:17:54,176 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 09:17:54,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 18 [2018-10-03 09:17:54,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 09:17:54,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-03 09:17:54,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-03 09:17:54,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-10-03 09:17:54,181 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2018-10-03 09:17:54,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:54,181 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-10-03 09:17:54,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 09:17:54,181 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-10-03 09:17:54,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-03 09:17:54,182 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:54,182 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1] [2018-10-03 09:17:54,182 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:54,182 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:54,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1861364563, now seen corresponding path program 12 times [2018-10-03 09:17:54,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:54,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:54,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:54,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:54,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:54,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:54,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:54,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:54,498 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:17:54,526 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-03 09:17:54,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:54,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:54,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:54,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-03 09:17:54,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-03 09:17:54,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-03 09:17:54,834 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:54,835 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 21 states. [2018-10-03 09:17:54,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:54,927 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2018-10-03 09:17:54,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 09:17:54,928 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2018-10-03 09:17:54,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:54,929 INFO L225 Difference]: With dead ends: 65 [2018-10-03 09:17:54,929 INFO L226 Difference]: Without dead ends: 61 [2018-10-03 09:17:54,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.1s impTime 19 [2018-10-03 09:17:54,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-03 09:17:54,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-03 09:17:54,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-03 09:17:54,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-10-03 09:17:54,934 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2018-10-03 09:17:54,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:54,934 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-10-03 09:17:54,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-03 09:17:54,935 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-10-03 09:17:54,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-03 09:17:54,935 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:54,935 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1] [2018-10-03 09:17:54,936 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:54,936 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:54,936 INFO L82 PathProgramCache]: Analyzing trace with hash -411470327, now seen corresponding path program 18 times [2018-10-03 09:17:54,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:54,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:54,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:54,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:54,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 19 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:55,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:55,274 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:55,281 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:17:55,324 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-03 09:17:55,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:55,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:55,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:55,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-10-03 09:17:55,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 09:17:55,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 09:17:55,870 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:55,870 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 41 states. [2018-10-03 09:17:58,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:58,220 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2018-10-03 09:17:58,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 09:17:58,221 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 59 [2018-10-03 09:17:58,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:58,221 INFO L225 Difference]: With dead ends: 68 [2018-10-03 09:17:58,222 INFO L226 Difference]: Without dead ends: 64 [2018-10-03 09:17:58,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.2s impTime 40 [2018-10-03 09:17:58,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-03 09:17:58,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-03 09:17:58,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-03 09:17:58,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-10-03 09:17:58,226 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2018-10-03 09:17:58,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:58,226 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-10-03 09:17:58,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 09:17:58,226 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-10-03 09:17:58,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-03 09:17:58,227 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:58,227 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1] [2018-10-03 09:17:58,227 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:58,227 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:58,228 INFO L82 PathProgramCache]: Analyzing trace with hash -274409835, now seen corresponding path program 19 times [2018-10-03 09:17:58,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:58,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:58,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:58,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:58,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 20 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:58,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:58,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:58,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:58,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 20 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:58,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:58,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-03 09:17:58,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 09:17:58,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 09:17:58,926 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:58,927 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 22 states. [2018-10-03 09:17:58,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:58,988 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2018-10-03 09:17:58,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 09:17:58,988 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2018-10-03 09:17:58,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:58,989 INFO L225 Difference]: With dead ends: 69 [2018-10-03 09:17:58,989 INFO L226 Difference]: Without dead ends: 65 [2018-10-03 09:17:58,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 20 [2018-10-03 09:17:58,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-03 09:17:58,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-03 09:17:58,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-03 09:17:58,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-10-03 09:17:58,994 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2018-10-03 09:17:58,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:58,994 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-10-03 09:17:58,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 09:17:58,994 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-10-03 09:17:58,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-03 09:17:58,995 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:58,995 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1] [2018-10-03 09:17:58,995 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:58,995 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:58,996 INFO L82 PathProgramCache]: Analyzing trace with hash -274409773, now seen corresponding path program 13 times [2018-10-03 09:17:58,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:58,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:58,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:58,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:58,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:59,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:59,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:59,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:59,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:59,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:59,607 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:59,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:59,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-03 09:17:59,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 09:17:59,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 09:17:59,630 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:59,630 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 23 states. [2018-10-03 09:17:59,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:59,665 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2018-10-03 09:17:59,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 09:17:59,666 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 62 [2018-10-03 09:17:59,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:59,667 INFO L225 Difference]: With dead ends: 71 [2018-10-03 09:17:59,667 INFO L226 Difference]: Without dead ends: 67 [2018-10-03 09:17:59,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 21 [2018-10-03 09:17:59,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-03 09:17:59,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-03 09:17:59,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-03 09:17:59,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2018-10-03 09:17:59,670 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 62 [2018-10-03 09:17:59,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:59,670 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2018-10-03 09:17:59,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 09:17:59,670 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2018-10-03 09:17:59,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-03 09:17:59,671 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:59,671 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1] [2018-10-03 09:17:59,671 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:59,671 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:59,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1619191159, now seen corresponding path program 20 times [2018-10-03 09:17:59,671 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:59,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:59,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:59,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:59,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:59,959 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 21 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:59,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:59,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:59,966 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:17:59,988 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:17:59,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:59,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:00,119 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 21 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:00,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:00,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-03 09:18:00,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 09:18:00,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 09:18:00,140 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:00,140 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 23 states. [2018-10-03 09:18:00,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:00,192 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2018-10-03 09:18:00,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 09:18:00,193 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2018-10-03 09:18:00,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:00,193 INFO L225 Difference]: With dead ends: 72 [2018-10-03 09:18:00,194 INFO L226 Difference]: Without dead ends: 68 [2018-10-03 09:18:00,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 21 [2018-10-03 09:18:00,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-03 09:18:00,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-03 09:18:00,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-03 09:18:00,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-10-03 09:18:00,197 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-10-03 09:18:00,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:00,198 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-10-03 09:18:00,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 09:18:00,198 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-10-03 09:18:00,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-03 09:18:00,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:00,198 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1] [2018-10-03 09:18:00,199 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:00,199 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:00,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1619191097, now seen corresponding path program 14 times [2018-10-03 09:18:00,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:00,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:00,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:00,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:00,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:00,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:00,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:00,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:00,471 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:18:00,502 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:18:00,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:00,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:00,611 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:00,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:00,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-03 09:18:00,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 09:18:00,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 09:18:00,634 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:00,634 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 24 states. [2018-10-03 09:18:00,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:00,669 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2018-10-03 09:18:00,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 09:18:00,669 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2018-10-03 09:18:00,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:00,670 INFO L225 Difference]: With dead ends: 74 [2018-10-03 09:18:00,671 INFO L226 Difference]: Without dead ends: 70 [2018-10-03 09:18:00,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 22 [2018-10-03 09:18:00,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-03 09:18:00,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-03 09:18:00,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-03 09:18:00,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-10-03 09:18:00,674 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2018-10-03 09:18:00,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:00,675 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-10-03 09:18:00,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 09:18:00,675 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-10-03 09:18:00,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-03 09:18:00,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:00,675 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1] [2018-10-03 09:18:00,675 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:00,676 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:00,676 INFO L82 PathProgramCache]: Analyzing trace with hash -544677355, now seen corresponding path program 21 times [2018-10-03 09:18:00,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:00,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:00,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:00,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:00,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 22 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:00,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:00,958 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:00,965 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:18:01,001 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-10-03 09:18:01,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:01,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:01,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:01,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-10-03 09:18:01,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 09:18:01,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 09:18:01,504 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:01,504 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 47 states. [2018-10-03 09:18:02,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:02,628 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2018-10-03 09:18:02,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 09:18:02,628 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 68 [2018-10-03 09:18:02,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:02,629 INFO L225 Difference]: With dead ends: 77 [2018-10-03 09:18:02,630 INFO L226 Difference]: Without dead ends: 73 [2018-10-03 09:18:02,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.3s impTime 46 [2018-10-03 09:18:02,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-03 09:18:02,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-03 09:18:02,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-03 09:18:02,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-10-03 09:18:02,634 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 68 [2018-10-03 09:18:02,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:02,635 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-10-03 09:18:02,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 09:18:02,635 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-10-03 09:18:02,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-03 09:18:02,636 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:02,636 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1] [2018-10-03 09:18:02,636 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:02,636 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:02,636 INFO L82 PathProgramCache]: Analyzing trace with hash -95199479, now seen corresponding path program 22 times [2018-10-03 09:18:02,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:02,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:02,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:02,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:02,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 23 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:02,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:02,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:03,007 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:18:03,028 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:18:03,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:03,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:03,514 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:03,535 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:03,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-10-03 09:18:03,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-03 09:18:03,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-03 09:18:03,536 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:03,536 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 49 states. [2018-10-03 09:18:04,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:04,769 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2018-10-03 09:18:04,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-03 09:18:04,770 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 71 [2018-10-03 09:18:04,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:04,771 INFO L225 Difference]: With dead ends: 80 [2018-10-03 09:18:04,771 INFO L226 Difference]: Without dead ends: 76 [2018-10-03 09:18:04,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.4s impTime 48 [2018-10-03 09:18:04,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-03 09:18:04,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-03 09:18:04,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-03 09:18:04,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-10-03 09:18:04,774 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 71 [2018-10-03 09:18:04,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:04,775 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-10-03 09:18:04,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-03 09:18:04,775 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-10-03 09:18:04,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-03 09:18:04,775 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:04,775 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1] [2018-10-03 09:18:04,775 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:04,775 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:04,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824491, now seen corresponding path program 23 times [2018-10-03 09:18:04,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:04,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:04,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:04,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:04,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 24 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:05,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:05,031 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:05,038 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:18:05,076 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-03 09:18:05,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:05,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 24 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:05,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:05,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-03 09:18:05,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 09:18:05,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 09:18:05,222 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:05,223 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 26 states. [2018-10-03 09:18:05,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:05,353 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2018-10-03 09:18:05,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 09:18:05,354 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2018-10-03 09:18:05,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:05,355 INFO L225 Difference]: With dead ends: 81 [2018-10-03 09:18:05,355 INFO L226 Difference]: Without dead ends: 77 [2018-10-03 09:18:05,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 24 [2018-10-03 09:18:05,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-03 09:18:05,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-03 09:18:05,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-03 09:18:05,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2018-10-03 09:18:05,359 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2018-10-03 09:18:05,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:05,359 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2018-10-03 09:18:05,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 09:18:05,359 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2018-10-03 09:18:05,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-03 09:18:05,359 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:05,359 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1] [2018-10-03 09:18:05,360 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:05,360 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:05,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824429, now seen corresponding path program 15 times [2018-10-03 09:18:05,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:05,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:05,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:05,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:05,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:06,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:06,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:06,191 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:18:06,230 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-03 09:18:06,231 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:06,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:06,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:06,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-03 09:18:06,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-03 09:18:06,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-03 09:18:06,421 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:06,421 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 27 states. [2018-10-03 09:18:06,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:06,487 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2018-10-03 09:18:06,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 09:18:06,488 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 74 [2018-10-03 09:18:06,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:06,489 INFO L225 Difference]: With dead ends: 83 [2018-10-03 09:18:06,489 INFO L226 Difference]: Without dead ends: 79 [2018-10-03 09:18:06,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 25 [2018-10-03 09:18:06,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-03 09:18:06,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-03 09:18:06,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-03 09:18:06,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2018-10-03 09:18:06,492 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2018-10-03 09:18:06,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:06,493 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2018-10-03 09:18:06,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-03 09:18:06,493 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2018-10-03 09:18:06,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-03 09:18:06,493 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:06,493 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1] [2018-10-03 09:18:06,493 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:06,493 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:06,494 INFO L82 PathProgramCache]: Analyzing trace with hash -142326903, now seen corresponding path program 24 times [2018-10-03 09:18:06,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:06,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:06,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:06,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:06,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 25 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:07,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:07,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:07,327 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:18:07,368 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-03 09:18:07,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:07,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:07,923 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:07,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-10-03 09:18:07,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 09:18:07,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 09:18:07,924 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:07,924 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 53 states. [2018-10-03 09:18:09,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:09,371 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2018-10-03 09:18:09,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 09:18:09,372 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 77 [2018-10-03 09:18:09,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:09,373 INFO L225 Difference]: With dead ends: 86 [2018-10-03 09:18:09,373 INFO L226 Difference]: Without dead ends: 82 [2018-10-03 09:18:09,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.0s impTime 52 [2018-10-03 09:18:09,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-03 09:18:09,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-03 09:18:09,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-03 09:18:09,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-10-03 09:18:09,377 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 77 [2018-10-03 09:18:09,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:09,377 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-10-03 09:18:09,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 09:18:09,377 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-10-03 09:18:09,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-03 09:18:09,378 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:09,378 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1] [2018-10-03 09:18:09,378 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:09,378 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:09,378 INFO L82 PathProgramCache]: Analyzing trace with hash -926607083, now seen corresponding path program 25 times [2018-10-03 09:18:09,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:09,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:09,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:09,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:09,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 26 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:09,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:09,924 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:09,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:18:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:09,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 26 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:10,137 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:10,137 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-03 09:18:10,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 09:18:10,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 09:18:10,137 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:10,138 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 28 states. [2018-10-03 09:18:10,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:10,217 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2018-10-03 09:18:10,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 09:18:10,218 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2018-10-03 09:18:10,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:10,219 INFO L225 Difference]: With dead ends: 87 [2018-10-03 09:18:10,219 INFO L226 Difference]: Without dead ends: 83 [2018-10-03 09:18:10,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 26 [2018-10-03 09:18:10,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-03 09:18:10,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-03 09:18:10,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-03 09:18:10,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2018-10-03 09:18:10,224 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2018-10-03 09:18:10,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:10,224 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2018-10-03 09:18:10,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 09:18:10,224 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2018-10-03 09:18:10,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-03 09:18:10,225 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:10,225 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1] [2018-10-03 09:18:10,225 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:10,226 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:10,226 INFO L82 PathProgramCache]: Analyzing trace with hash -926607021, now seen corresponding path program 16 times [2018-10-03 09:18:10,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:10,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:10,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:10,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:18:10,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:10,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:10,699 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:10,709 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:18:10,733 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:18:10,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:10,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:10,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:10,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:10,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-03 09:18:10,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 09:18:10,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 09:18:10,878 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:10,878 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 29 states. [2018-10-03 09:18:10,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:10,999 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2018-10-03 09:18:11,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 09:18:11,000 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 80 [2018-10-03 09:18:11,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:11,001 INFO L225 Difference]: With dead ends: 89 [2018-10-03 09:18:11,001 INFO L226 Difference]: Without dead ends: 85 [2018-10-03 09:18:11,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 27 [2018-10-03 09:18:11,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-03 09:18:11,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-03 09:18:11,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-03 09:18:11,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-10-03 09:18:11,005 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 80 [2018-10-03 09:18:11,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:11,006 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-10-03 09:18:11,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 09:18:11,006 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-10-03 09:18:11,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-03 09:18:11,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:11,006 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1] [2018-10-03 09:18:11,007 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:11,007 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:11,007 INFO L82 PathProgramCache]: Analyzing trace with hash -795359223, now seen corresponding path program 26 times [2018-10-03 09:18:11,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:11,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:11,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:11,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:11,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 27 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:11,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:11,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:11,448 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:18:11,473 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:18:11,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:11,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 27 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:11,619 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:11,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-03 09:18:11,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 09:18:11,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 09:18:11,620 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:11,620 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 29 states. [2018-10-03 09:18:11,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:11,685 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2018-10-03 09:18:11,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 09:18:11,685 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 83 [2018-10-03 09:18:11,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:11,686 INFO L225 Difference]: With dead ends: 90 [2018-10-03 09:18:11,686 INFO L226 Difference]: Without dead ends: 86 [2018-10-03 09:18:11,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 27 [2018-10-03 09:18:11,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-03 09:18:11,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-03 09:18:11,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-03 09:18:11,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-10-03 09:18:11,690 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2018-10-03 09:18:11,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:11,690 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-10-03 09:18:11,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 09:18:11,690 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-10-03 09:18:11,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-03 09:18:11,691 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:11,691 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1] [2018-10-03 09:18:11,691 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:11,691 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:11,691 INFO L82 PathProgramCache]: Analyzing trace with hash -795359161, now seen corresponding path program 17 times [2018-10-03 09:18:11,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:11,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:11,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:11,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:11,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:12,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:12,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:12,281 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:12,288 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:18:12,330 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-03 09:18:12,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:12,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:12,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:12,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-03 09:18:12,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 09:18:12,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 09:18:12,527 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:12,527 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 30 states. [2018-10-03 09:18:12,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:12,580 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2018-10-03 09:18:12,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 09:18:12,581 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2018-10-03 09:18:12,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:12,582 INFO L225 Difference]: With dead ends: 92 [2018-10-03 09:18:12,582 INFO L226 Difference]: Without dead ends: 88 [2018-10-03 09:18:12,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 28 [2018-10-03 09:18:12,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-03 09:18:12,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-03 09:18:12,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-03 09:18:12,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-10-03 09:18:12,586 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 83 [2018-10-03 09:18:12,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:12,586 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-10-03 09:18:12,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 09:18:12,586 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-10-03 09:18:12,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-03 09:18:12,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:12,587 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1] [2018-10-03 09:18:12,587 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:12,587 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:12,587 INFO L82 PathProgramCache]: Analyzing trace with hash 789398677, now seen corresponding path program 27 times [2018-10-03 09:18:12,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:12,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:12,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:12,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:12,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 28 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:13,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:13,067 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:13,076 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:18:13,134 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-10-03 09:18:13,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:13,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:13,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:13,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-10-03 09:18:13,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 09:18:13,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 09:18:13,941 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:13,941 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 59 states. [2018-10-03 09:18:15,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:15,717 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2018-10-03 09:18:15,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 09:18:15,717 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 86 [2018-10-03 09:18:15,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:15,718 INFO L225 Difference]: With dead ends: 95 [2018-10-03 09:18:15,718 INFO L226 Difference]: Without dead ends: 91 [2018-10-03 09:18:15,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.3s impTime 58 [2018-10-03 09:18:15,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-03 09:18:15,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-03 09:18:15,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-03 09:18:15,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-10-03 09:18:15,722 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2018-10-03 09:18:15,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:15,722 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-10-03 09:18:15,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 09:18:15,722 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-10-03 09:18:15,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-03 09:18:15,723 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:15,723 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1] [2018-10-03 09:18:15,723 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:15,723 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:15,723 INFO L82 PathProgramCache]: Analyzing trace with hash 2031479945, now seen corresponding path program 28 times [2018-10-03 09:18:15,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:15,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:15,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:15,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:15,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 29 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:16,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:16,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:16,184 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:18:16,212 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:18:16,212 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:16,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 29 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:16,377 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:16,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-03 09:18:16,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 09:18:16,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 09:18:16,377 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:16,377 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 31 states. [2018-10-03 09:18:16,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:16,466 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2018-10-03 09:18:16,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 09:18:16,466 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 89 [2018-10-03 09:18:16,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:16,467 INFO L225 Difference]: With dead ends: 96 [2018-10-03 09:18:16,468 INFO L226 Difference]: Without dead ends: 92 [2018-10-03 09:18:16,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 29 [2018-10-03 09:18:16,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-03 09:18:16,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-03 09:18:16,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-03 09:18:16,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-10-03 09:18:16,472 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2018-10-03 09:18:16,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:16,472 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-10-03 09:18:16,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 09:18:16,472 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-10-03 09:18:16,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-03 09:18:16,473 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:16,473 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1] [2018-10-03 09:18:16,473 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:16,473 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:16,473 INFO L82 PathProgramCache]: Analyzing trace with hash 2031480007, now seen corresponding path program 18 times [2018-10-03 09:18:16,473 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:16,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:16,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:16,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:16,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:16,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:16,980 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:16,987 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:18:17,035 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-10-03 09:18:17,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:17,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:17,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:17,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-03 09:18:17,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 09:18:17,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 09:18:17,648 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:17,648 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 32 states. [2018-10-03 09:18:17,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:17,724 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2018-10-03 09:18:17,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 09:18:17,725 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 89 [2018-10-03 09:18:17,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:17,726 INFO L225 Difference]: With dead ends: 98 [2018-10-03 09:18:17,726 INFO L226 Difference]: Without dead ends: 94 [2018-10-03 09:18:17,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.3s impTime 30 [2018-10-03 09:18:17,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-03 09:18:17,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-03 09:18:17,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-03 09:18:17,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-10-03 09:18:17,730 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 89 [2018-10-03 09:18:17,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:17,730 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-10-03 09:18:17,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 09:18:17,730 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-10-03 09:18:17,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-03 09:18:17,731 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:17,731 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1] [2018-10-03 09:18:17,731 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:17,731 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:17,732 INFO L82 PathProgramCache]: Analyzing trace with hash -563687403, now seen corresponding path program 29 times [2018-10-03 09:18:17,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:17,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:17,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:17,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:17,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:18,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 30 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:18,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:18,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:18,106 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:18:18,163 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-03 09:18:18,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:18,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 30 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:18,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:18,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-03 09:18:18,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 09:18:18,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 09:18:18,337 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:18,337 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 32 states. [2018-10-03 09:18:18,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:18,562 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2018-10-03 09:18:18,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 09:18:18,562 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 92 [2018-10-03 09:18:18,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:18,564 INFO L225 Difference]: With dead ends: 99 [2018-10-03 09:18:18,564 INFO L226 Difference]: Without dead ends: 95 [2018-10-03 09:18:18,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 30 [2018-10-03 09:18:18,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-03 09:18:18,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-03 09:18:18,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-03 09:18:18,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-10-03 09:18:18,568 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2018-10-03 09:18:18,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:18,568 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-10-03 09:18:18,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 09:18:18,569 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-10-03 09:18:18,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-03 09:18:18,569 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:18,569 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1] [2018-10-03 09:18:18,570 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:18,570 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:18,570 INFO L82 PathProgramCache]: Analyzing trace with hash -563687341, now seen corresponding path program 19 times [2018-10-03 09:18:18,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:18,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:18,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:18,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:18,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:18,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:20,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:20,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:20,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:18:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:20,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:20,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:20,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-03 09:18:20,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-03 09:18:20,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-03 09:18:20,537 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:20,537 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 33 states. [2018-10-03 09:18:20,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:20,614 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2018-10-03 09:18:20,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-03 09:18:20,615 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 92 [2018-10-03 09:18:20,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:20,616 INFO L225 Difference]: With dead ends: 101 [2018-10-03 09:18:20,616 INFO L226 Difference]: Without dead ends: 97 [2018-10-03 09:18:20,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.2s impTime 31 [2018-10-03 09:18:20,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-03 09:18:20,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-03 09:18:20,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-03 09:18:20,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2018-10-03 09:18:20,620 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 92 [2018-10-03 09:18:20,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:20,620 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2018-10-03 09:18:20,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-03 09:18:20,620 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2018-10-03 09:18:20,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-03 09:18:20,620 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:20,620 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1] [2018-10-03 09:18:20,621 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:20,621 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:20,621 INFO L82 PathProgramCache]: Analyzing trace with hash 512143625, now seen corresponding path program 30 times [2018-10-03 09:18:20,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:20,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:20,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:20,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:18:20,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:21,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 31 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:21,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:21,208 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:21,216 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:18:21,269 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-10-03 09:18:21,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:21,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:22,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:22,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-10-03 09:18:22,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-03 09:18:22,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-03 09:18:22,091 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:22,091 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 65 states. [2018-10-03 09:18:23,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:23,777 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2018-10-03 09:18:23,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-03 09:18:23,778 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 95 [2018-10-03 09:18:23,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:23,780 INFO L225 Difference]: With dead ends: 104 [2018-10-03 09:18:23,781 INFO L226 Difference]: Without dead ends: 100 [2018-10-03 09:18:23,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.2s impTime 64 [2018-10-03 09:18:23,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-03 09:18:23,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-03 09:18:23,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-03 09:18:23,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-10-03 09:18:23,784 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 95 [2018-10-03 09:18:23,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:23,785 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-10-03 09:18:23,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-03 09:18:23,785 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-10-03 09:18:23,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-03 09:18:23,787 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:23,787 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1] [2018-10-03 09:18:23,787 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:23,788 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:23,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1548336021, now seen corresponding path program 31 times [2018-10-03 09:18:23,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:23,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:23,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:23,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:23,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 32 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:24,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:24,454 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:24,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:18:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:24,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 32 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:24,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:24,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-03 09:18:24,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 09:18:24,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 09:18:24,679 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:24,679 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 34 states. [2018-10-03 09:18:24,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:24,736 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2018-10-03 09:18:24,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 09:18:24,737 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 98 [2018-10-03 09:18:24,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:24,738 INFO L225 Difference]: With dead ends: 105 [2018-10-03 09:18:24,738 INFO L226 Difference]: Without dead ends: 101 [2018-10-03 09:18:24,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 32 [2018-10-03 09:18:24,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-03 09:18:24,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-03 09:18:24,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-03 09:18:24,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-10-03 09:18:24,742 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2018-10-03 09:18:24,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:24,743 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-10-03 09:18:24,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 09:18:24,743 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-10-03 09:18:24,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-03 09:18:24,743 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:24,743 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1] [2018-10-03 09:18:24,744 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:24,744 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:24,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1548336083, now seen corresponding path program 20 times [2018-10-03 09:18:24,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:24,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:24,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:24,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:18:24,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:25,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:25,316 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:25,326 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:18:25,357 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:18:25,357 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:25,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:25,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:25,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:25,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-03 09:18:25,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 09:18:25,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 09:18:25,522 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:25,523 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 35 states. [2018-10-03 09:18:25,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:25,604 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2018-10-03 09:18:25,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 09:18:25,605 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 98 [2018-10-03 09:18:25,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:25,606 INFO L225 Difference]: With dead ends: 107 [2018-10-03 09:18:25,606 INFO L226 Difference]: Without dead ends: 103 [2018-10-03 09:18:25,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 33 [2018-10-03 09:18:25,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-03 09:18:25,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-03 09:18:25,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-03 09:18:25,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2018-10-03 09:18:25,610 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 98 [2018-10-03 09:18:25,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:25,611 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2018-10-03 09:18:25,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 09:18:25,611 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2018-10-03 09:18:25,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-03 09:18:25,612 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:25,612 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1] [2018-10-03 09:18:25,612 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:25,612 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:25,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1468918391, now seen corresponding path program 32 times [2018-10-03 09:18:25,612 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:25,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:25,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:25,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:25,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 33 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:26,593 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:26,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:26,600 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:18:26,653 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:18:26,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:26,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:26,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 33 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:26,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:26,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-03 09:18:26,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 09:18:26,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 09:18:26,892 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:26,892 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 35 states. [2018-10-03 09:18:26,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:26,974 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2018-10-03 09:18:26,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 09:18:26,975 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 101 [2018-10-03 09:18:26,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:26,976 INFO L225 Difference]: With dead ends: 108 [2018-10-03 09:18:26,976 INFO L226 Difference]: Without dead ends: 104 [2018-10-03 09:18:26,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.6s impTime 33 [2018-10-03 09:18:26,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-03 09:18:26,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-03 09:18:26,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-03 09:18:26,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-10-03 09:18:26,980 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2018-10-03 09:18:26,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:26,981 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-10-03 09:18:26,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 09:18:26,981 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-10-03 09:18:26,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-03 09:18:26,982 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:26,982 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1] [2018-10-03 09:18:26,982 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:26,982 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:26,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1468918329, now seen corresponding path program 21 times [2018-10-03 09:18:26,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:26,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:26,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:26,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:26,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:27,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:27,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:27,570 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:18:27,629 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-03 09:18:27,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:27,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:27,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:27,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:27,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-03 09:18:27,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 09:18:27,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 09:18:27,822 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:27,822 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 36 states. [2018-10-03 09:18:27,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:27,902 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2018-10-03 09:18:27,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 09:18:27,902 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 101 [2018-10-03 09:18:27,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:27,903 INFO L225 Difference]: With dead ends: 110 [2018-10-03 09:18:27,904 INFO L226 Difference]: Without dead ends: 106 [2018-10-03 09:18:27,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 34 [2018-10-03 09:18:27,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-03 09:18:27,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-03 09:18:27,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-03 09:18:27,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-10-03 09:18:27,908 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 101 [2018-10-03 09:18:27,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:27,908 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-10-03 09:18:27,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 09:18:27,909 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-10-03 09:18:27,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-03 09:18:27,909 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:27,909 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1] [2018-10-03 09:18:27,910 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:27,910 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:27,910 INFO L82 PathProgramCache]: Analyzing trace with hash 875431701, now seen corresponding path program 33 times [2018-10-03 09:18:27,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:27,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:27,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:27,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:27,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 34 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:28,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:28,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:28,816 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:18:28,876 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-10-03 09:18:28,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:28,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:30,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:30,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-10-03 09:18:30,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-03 09:18:30,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-03 09:18:30,089 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:30,089 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 71 states. [2018-10-03 09:18:31,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:31,974 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2018-10-03 09:18:31,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-03 09:18:31,975 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 104 [2018-10-03 09:18:31,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:31,976 INFO L225 Difference]: With dead ends: 113 [2018-10-03 09:18:31,976 INFO L226 Difference]: Without dead ends: 109 [2018-10-03 09:18:31,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time 3.1s impTime 70 [2018-10-03 09:18:31,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-03 09:18:31,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-03 09:18:31,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-03 09:18:31,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2018-10-03 09:18:31,980 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 104 [2018-10-03 09:18:31,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:31,980 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2018-10-03 09:18:31,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-03 09:18:31,980 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2018-10-03 09:18:31,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-03 09:18:31,981 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:31,981 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1] [2018-10-03 09:18:31,981 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:31,981 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:31,982 INFO L82 PathProgramCache]: Analyzing trace with hash 945822217, now seen corresponding path program 34 times [2018-10-03 09:18:31,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:31,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:31,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:31,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:31,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:32,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 35 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:32,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:32,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:32,779 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:18:32,809 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:18:32,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:32,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:33,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 35 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:33,134 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:33,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-03 09:18:33,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-03 09:18:33,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-03 09:18:33,135 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:33,135 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 37 states. [2018-10-03 09:18:33,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:33,681 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2018-10-03 09:18:33,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 09:18:33,682 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 107 [2018-10-03 09:18:33,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:33,683 INFO L225 Difference]: With dead ends: 114 [2018-10-03 09:18:33,683 INFO L226 Difference]: Without dead ends: 110 [2018-10-03 09:18:33,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.5s impTime 35 [2018-10-03 09:18:33,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-03 09:18:33,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-03 09:18:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-03 09:18:33,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-10-03 09:18:33,688 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2018-10-03 09:18:33,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:33,688 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-10-03 09:18:33,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-03 09:18:33,688 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-10-03 09:18:33,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-03 09:18:33,689 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:33,689 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1] [2018-10-03 09:18:33,689 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:33,689 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:33,690 INFO L82 PathProgramCache]: Analyzing trace with hash 945822279, now seen corresponding path program 22 times [2018-10-03 09:18:33,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:33,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:33,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:33,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:33,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:33,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:34,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:34,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:34,476 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:34,483 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:18:34,525 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:18:34,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:34,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:34,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:34,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-03 09:18:34,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 09:18:34,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 09:18:34,774 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:34,775 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 38 states. [2018-10-03 09:18:34,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:34,859 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-10-03 09:18:34,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 09:18:34,859 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 107 [2018-10-03 09:18:34,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:34,860 INFO L225 Difference]: With dead ends: 116 [2018-10-03 09:18:34,860 INFO L226 Difference]: Without dead ends: 112 [2018-10-03 09:18:34,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 36 [2018-10-03 09:18:34,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-03 09:18:34,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-03 09:18:34,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-03 09:18:34,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-10-03 09:18:34,864 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2018-10-03 09:18:34,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:34,865 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-10-03 09:18:34,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 09:18:34,865 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-10-03 09:18:34,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-03 09:18:34,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:34,865 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1] [2018-10-03 09:18:34,865 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:34,866 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:34,866 INFO L82 PathProgramCache]: Analyzing trace with hash 2005643925, now seen corresponding path program 35 times [2018-10-03 09:18:34,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:34,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:34,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:34,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:34,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 36 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:35,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:35,997 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:36,004 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:18:36,072 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-03 09:18:36,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:36,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:36,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 36 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:36,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:36,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-03 09:18:36,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 09:18:36,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 09:18:36,309 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:36,309 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 38 states. [2018-10-03 09:18:36,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:36,419 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2018-10-03 09:18:36,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 09:18:36,419 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 110 [2018-10-03 09:18:36,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:36,420 INFO L225 Difference]: With dead ends: 117 [2018-10-03 09:18:36,420 INFO L226 Difference]: Without dead ends: 113 [2018-10-03 09:18:36,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.7s impTime 36 [2018-10-03 09:18:36,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-03 09:18:36,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-03 09:18:36,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-03 09:18:36,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2018-10-03 09:18:36,425 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 110 [2018-10-03 09:18:36,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:36,425 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2018-10-03 09:18:36,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 09:18:36,425 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2018-10-03 09:18:36,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-03 09:18:36,426 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:36,426 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1] [2018-10-03 09:18:36,426 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:36,426 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:36,426 INFO L82 PathProgramCache]: Analyzing trace with hash 2005643987, now seen corresponding path program 23 times [2018-10-03 09:18:36,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:36,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:36,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:36,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:36,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:36,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:40,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:40,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:40,654 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:40,663 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:18:40,725 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-03 09:18:40,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:40,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:40,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:40,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-03 09:18:40,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-03 09:18:40,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-03 09:18:40,932 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:40,932 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 39 states. [2018-10-03 09:18:40,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:40,990 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2018-10-03 09:18:40,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-03 09:18:40,990 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 110 [2018-10-03 09:18:40,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:40,991 INFO L225 Difference]: With dead ends: 119 [2018-10-03 09:18:40,992 INFO L226 Difference]: Without dead ends: 115 [2018-10-03 09:18:40,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s Time 3.5s impTime 37 [2018-10-03 09:18:40,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-03 09:18:40,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-03 09:18:40,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-03 09:18:40,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-10-03 09:18:40,996 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 110 [2018-10-03 09:18:40,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:40,996 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-10-03 09:18:40,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-03 09:18:40,996 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-10-03 09:18:40,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-03 09:18:40,997 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:40,997 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 1, 1, 1] [2018-10-03 09:18:40,997 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:40,998 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:40,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1445413239, now seen corresponding path program 36 times [2018-10-03 09:18:40,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:40,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:40,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:40,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:40,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:41,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 37 proven. 1998 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:41,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:41,826 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:41,833 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:18:41,902 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-03 09:18:41,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:41,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:43,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:43,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:43,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-10-03 09:18:43,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-03 09:18:43,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-03 09:18:43,064 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:43,064 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 77 states. [2018-10-03 09:18:45,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:45,666 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2018-10-03 09:18:45,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-03 09:18:45,666 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 113 [2018-10-03 09:18:45,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:45,667 INFO L225 Difference]: With dead ends: 122 [2018-10-03 09:18:45,667 INFO L226 Difference]: Without dead ends: 118 [2018-10-03 09:18:45,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s Time 3.5s impTime 76 [2018-10-03 09:18:45,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-03 09:18:45,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-03 09:18:45,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-03 09:18:45,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-10-03 09:18:45,671 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 113 [2018-10-03 09:18:45,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:45,671 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-10-03 09:18:45,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-03 09:18:45,671 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-10-03 09:18:45,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-03 09:18:45,672 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:45,672 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 1, 1, 1] [2018-10-03 09:18:45,672 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:45,672 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:45,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1037745685, now seen corresponding path program 37 times [2018-10-03 09:18:45,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:45,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:45,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:45,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:45,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:47,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 38 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:47,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:47,071 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:47,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:18:47,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:47,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 38 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:47,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:47,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-03 09:18:47,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 09:18:47,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 09:18:47,357 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:47,357 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 40 states. [2018-10-03 09:18:47,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:47,447 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2018-10-03 09:18:47,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 09:18:47,447 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 116 [2018-10-03 09:18:47,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:47,448 INFO L225 Difference]: With dead ends: 123 [2018-10-03 09:18:47,448 INFO L226 Difference]: Without dead ends: 119 [2018-10-03 09:18:47,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.0s impTime 38 [2018-10-03 09:18:47,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-03 09:18:47,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-03 09:18:47,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-03 09:18:47,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-10-03 09:18:47,451 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2018-10-03 09:18:47,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:47,451 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-10-03 09:18:47,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 09:18:47,451 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-10-03 09:18:47,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-03 09:18:47,452 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:47,452 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 1, 1] [2018-10-03 09:18:47,452 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:47,452 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:47,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1037745747, now seen corresponding path program 24 times [2018-10-03 09:18:47,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:47,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:47,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:47,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:18:47,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:47,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:47,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:47,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:47,900 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:18:47,963 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-10-03 09:18:47,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:47,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:48,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:48,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-03 09:18:48,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 09:18:48,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 09:18:48,167 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:48,167 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 41 states. [2018-10-03 09:18:48,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:48,232 INFO L93 Difference]: Finished difference Result 125 states and 131 transitions. [2018-10-03 09:18:48,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 09:18:48,232 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 116 [2018-10-03 09:18:48,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:48,233 INFO L225 Difference]: With dead ends: 125 [2018-10-03 09:18:48,234 INFO L226 Difference]: Without dead ends: 121 [2018-10-03 09:18:48,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 39 [2018-10-03 09:18:48,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-03 09:18:48,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-03 09:18:48,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-03 09:18:48,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-10-03 09:18:48,239 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 116 [2018-10-03 09:18:48,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:48,239 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-10-03 09:18:48,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 09:18:48,239 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-10-03 09:18:48,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-03 09:18:48,240 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:48,240 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 1, 1, 1] [2018-10-03 09:18:48,240 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:48,240 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:48,240 INFO L82 PathProgramCache]: Analyzing trace with hash 308544265, now seen corresponding path program 38 times [2018-10-03 09:18:48,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:48,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:48,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:48,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:48,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 39 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:48,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:48,969 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:48,984 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:18:49,038 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:18:49,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:49,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 39 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:49,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:49,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-03 09:18:49,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 09:18:49,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 09:18:49,268 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:49,268 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 41 states. [2018-10-03 09:18:49,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:49,360 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2018-10-03 09:18:49,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 09:18:49,360 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 119 [2018-10-03 09:18:49,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:49,361 INFO L225 Difference]: With dead ends: 126 [2018-10-03 09:18:49,361 INFO L226 Difference]: Without dead ends: 122 [2018-10-03 09:18:49,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime 39 [2018-10-03 09:18:49,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-03 09:18:49,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-10-03 09:18:49,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-03 09:18:49,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-10-03 09:18:49,365 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 119 [2018-10-03 09:18:49,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:49,366 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-10-03 09:18:49,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 09:18:49,366 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-10-03 09:18:49,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-03 09:18:49,366 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:49,367 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 1, 1] [2018-10-03 09:18:49,367 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:49,367 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:49,367 INFO L82 PathProgramCache]: Analyzing trace with hash 308544327, now seen corresponding path program 25 times [2018-10-03 09:18:49,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:49,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:49,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:49,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:49,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:50,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:50,471 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:50,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:18:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:50,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:50,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:50,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-03 09:18:50,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 09:18:50,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 09:18:50,745 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:50,745 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 42 states. [2018-10-03 09:18:50,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:50,841 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2018-10-03 09:18:50,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 09:18:50,842 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 119 [2018-10-03 09:18:50,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:50,843 INFO L225 Difference]: With dead ends: 128 [2018-10-03 09:18:50,843 INFO L226 Difference]: Without dead ends: 124 [2018-10-03 09:18:50,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 40 [2018-10-03 09:18:50,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-03 09:18:50,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-10-03 09:18:50,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-03 09:18:50,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2018-10-03 09:18:50,847 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 119 [2018-10-03 09:18:50,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:50,848 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2018-10-03 09:18:50,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 09:18:50,848 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2018-10-03 09:18:50,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-03 09:18:50,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:50,848 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 1, 1, 1] [2018-10-03 09:18:50,849 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:50,849 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:50,849 INFO L82 PathProgramCache]: Analyzing trace with hash 613624213, now seen corresponding path program 39 times [2018-10-03 09:18:50,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:50,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:50,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:50,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:18:50,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 40 proven. 2340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:51,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:51,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:51,391 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:18:51,457 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2018-10-03 09:18:51,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:51,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:52,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:52,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-10-03 09:18:52,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-03 09:18:52,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-03 09:18:52,775 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:52,775 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 83 states. [2018-10-03 09:18:55,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:55,269 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2018-10-03 09:18:55,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-03 09:18:55,269 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 122 [2018-10-03 09:18:55,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:55,270 INFO L225 Difference]: With dead ends: 131 [2018-10-03 09:18:55,270 INFO L226 Difference]: Without dead ends: 127 [2018-10-03 09:18:55,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time 3.4s impTime 82 [2018-10-03 09:18:55,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-03 09:18:55,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-03 09:18:55,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-03 09:18:55,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2018-10-03 09:18:55,274 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 122 [2018-10-03 09:18:55,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:55,274 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2018-10-03 09:18:55,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-03 09:18:55,274 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2018-10-03 09:18:55,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-03 09:18:55,275 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:55,275 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 1, 1, 1] [2018-10-03 09:18:55,275 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:55,275 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:55,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1099556745, now seen corresponding path program 40 times [2018-10-03 09:18:55,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:55,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:55,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:55,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:55,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 41 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:55,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:55,907 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:55,914 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:18:55,950 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:18:55,950 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:55,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 41 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:56,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:56,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-03 09:18:56,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 09:18:56,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 09:18:56,190 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:56,190 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 43 states. [2018-10-03 09:18:56,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:56,282 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2018-10-03 09:18:56,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-03 09:18:56,282 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 125 [2018-10-03 09:18:56,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:56,283 INFO L225 Difference]: With dead ends: 132 [2018-10-03 09:18:56,283 INFO L226 Difference]: Without dead ends: 128 [2018-10-03 09:18:56,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 41 [2018-10-03 09:18:56,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-03 09:18:56,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-10-03 09:18:56,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-03 09:18:56,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2018-10-03 09:18:56,286 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 125 [2018-10-03 09:18:56,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:56,286 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2018-10-03 09:18:56,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 09:18:56,287 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2018-10-03 09:18:56,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-03 09:18:56,287 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:56,287 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 1, 1] [2018-10-03 09:18:56,287 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:56,287 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:56,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1099556807, now seen corresponding path program 26 times [2018-10-03 09:18:56,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:56,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:56,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:56,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:56,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:56,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:56,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:56,997 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:18:57,033 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:18:57,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:57,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:58,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:58,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-03 09:18:58,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 09:18:58,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 09:18:58,666 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:58,666 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 44 states. [2018-10-03 09:18:58,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:58,726 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2018-10-03 09:18:58,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 09:18:58,726 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 125 [2018-10-03 09:18:58,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:58,727 INFO L225 Difference]: With dead ends: 134 [2018-10-03 09:18:58,727 INFO L226 Difference]: Without dead ends: 130 [2018-10-03 09:18:58,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 0.5s impTime 42 [2018-10-03 09:18:58,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-03 09:18:58,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-10-03 09:18:58,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-03 09:18:58,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2018-10-03 09:18:58,732 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 125 [2018-10-03 09:18:58,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:58,732 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2018-10-03 09:18:58,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 09:18:58,732 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2018-10-03 09:18:58,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-03 09:18:58,732 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:58,733 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 1, 1, 1] [2018-10-03 09:18:58,733 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:58,733 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:58,733 INFO L82 PathProgramCache]: Analyzing trace with hash -819137259, now seen corresponding path program 41 times [2018-10-03 09:18:58,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:58,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:58,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:58,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:58,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:59,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 42 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:59,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:59,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:59,472 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:18:59,542 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-03 09:18:59,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:59,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 42 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:00,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:00,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-03 09:19:00,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 09:19:00,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 09:19:00,620 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:00,620 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 44 states. [2018-10-03 09:19:01,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:01,946 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2018-10-03 09:19:01,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 09:19:01,946 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 128 [2018-10-03 09:19:01,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:01,947 INFO L225 Difference]: With dead ends: 135 [2018-10-03 09:19:01,947 INFO L226 Difference]: Without dead ends: 131 [2018-10-03 09:19:01,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 0.6s impTime 42 [2018-10-03 09:19:01,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-03 09:19:01,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-03 09:19:01,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-03 09:19:01,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-10-03 09:19:01,951 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 128 [2018-10-03 09:19:01,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:01,951 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-10-03 09:19:01,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 09:19:01,952 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-10-03 09:19:01,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-03 09:19:01,952 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:01,953 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 1, 1] [2018-10-03 09:19:01,953 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:01,953 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:01,953 INFO L82 PathProgramCache]: Analyzing trace with hash -819137197, now seen corresponding path program 27 times [2018-10-03 09:19:01,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:01,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:01,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:01,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:01,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:02,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:02,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:02,548 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:19:02,622 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 43 check-sat command(s) [2018-10-03 09:19:02,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:02,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:02,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:02,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-03 09:19:02,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-03 09:19:02,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-03 09:19:02,941 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:02,941 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 45 states. [2018-10-03 09:19:03,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:03,026 INFO L93 Difference]: Finished difference Result 137 states and 143 transitions. [2018-10-03 09:19:03,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-03 09:19:03,026 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 128 [2018-10-03 09:19:03,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:03,028 INFO L225 Difference]: With dead ends: 137 [2018-10-03 09:19:03,028 INFO L226 Difference]: Without dead ends: 133 [2018-10-03 09:19:03,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 43 [2018-10-03 09:19:03,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-03 09:19:03,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-03 09:19:03,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-03 09:19:03,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-10-03 09:19:03,032 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2018-10-03 09:19:03,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:03,032 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-10-03 09:19:03,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-03 09:19:03,033 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-10-03 09:19:03,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-03 09:19:03,033 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:03,033 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1] [2018-10-03 09:19:03,033 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:03,033 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:03,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1087532041, now seen corresponding path program 42 times [2018-10-03 09:19:03,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:03,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:03,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:03,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:03,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 43 proven. 2709 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:03,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:03,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:03,617 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:19:03,688 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-10-03 09:19:03,689 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:03,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:04,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:04,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-10-03 09:19:04,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-03 09:19:04,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-03 09:19:04,665 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:04,665 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 89 states. [2018-10-03 09:19:07,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:07,246 INFO L93 Difference]: Finished difference Result 140 states and 147 transitions. [2018-10-03 09:19:07,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-03 09:19:07,247 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 131 [2018-10-03 09:19:07,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:07,248 INFO L225 Difference]: With dead ends: 140 [2018-10-03 09:19:07,248 INFO L226 Difference]: Without dead ends: 136 [2018-10-03 09:19:07,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s Time 3.2s impTime 88 [2018-10-03 09:19:07,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-03 09:19:07,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-10-03 09:19:07,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-03 09:19:07,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-10-03 09:19:07,251 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 131 [2018-10-03 09:19:07,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:07,251 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-10-03 09:19:07,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-03 09:19:07,251 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-10-03 09:19:07,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-03 09:19:07,252 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:07,252 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 1, 1, 1] [2018-10-03 09:19:07,252 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:07,252 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:07,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1730158741, now seen corresponding path program 43 times [2018-10-03 09:19:07,252 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:07,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:07,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:07,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:07,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:07,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 44 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:07,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:07,976 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:07,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:19:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:08,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 44 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:08,261 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:08,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-03 09:19:08,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 09:19:08,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 09:19:08,262 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:08,262 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 46 states. [2018-10-03 09:19:08,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:08,375 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2018-10-03 09:19:08,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-03 09:19:08,375 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 134 [2018-10-03 09:19:08,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:08,376 INFO L225 Difference]: With dead ends: 141 [2018-10-03 09:19:08,376 INFO L226 Difference]: Without dead ends: 137 [2018-10-03 09:19:08,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime 44 [2018-10-03 09:19:08,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-03 09:19:08,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-03 09:19:08,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-03 09:19:08,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2018-10-03 09:19:08,381 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 134 [2018-10-03 09:19:08,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:08,381 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2018-10-03 09:19:08,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 09:19:08,381 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2018-10-03 09:19:08,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-03 09:19:08,381 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:08,381 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 1, 1] [2018-10-03 09:19:08,382 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:08,382 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:08,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1730158803, now seen corresponding path program 28 times [2018-10-03 09:19:08,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:08,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:08,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:08,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:19:08,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:09,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:09,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:09,098 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:19:09,136 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:19:09,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:09,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:09,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:09,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:09,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-03 09:19:09,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 09:19:09,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 09:19:09,373 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:09,373 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 47 states. [2018-10-03 09:19:09,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:09,449 INFO L93 Difference]: Finished difference Result 143 states and 149 transitions. [2018-10-03 09:19:09,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 09:19:09,450 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 134 [2018-10-03 09:19:09,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:09,451 INFO L225 Difference]: With dead ends: 143 [2018-10-03 09:19:09,451 INFO L226 Difference]: Without dead ends: 139 [2018-10-03 09:19:09,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 45 [2018-10-03 09:19:09,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-03 09:19:09,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-03 09:19:09,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-03 09:19:09,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2018-10-03 09:19:09,456 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 134 [2018-10-03 09:19:09,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:09,456 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2018-10-03 09:19:09,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 09:19:09,456 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2018-10-03 09:19:09,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-03 09:19:09,457 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:09,457 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 1, 1, 1] [2018-10-03 09:19:09,457 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:09,457 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:09,457 INFO L82 PathProgramCache]: Analyzing trace with hash -742027127, now seen corresponding path program 44 times [2018-10-03 09:19:09,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:09,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:09,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:09,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:09,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:10,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 45 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:10,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:10,588 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:10,595 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:19:10,636 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:19:10,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:10,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 45 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:10,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:10,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-03 09:19:10,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 09:19:10,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 09:19:10,889 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:10,889 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 47 states. [2018-10-03 09:19:11,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:11,008 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2018-10-03 09:19:11,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 09:19:11,008 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 137 [2018-10-03 09:19:11,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:11,009 INFO L225 Difference]: With dead ends: 144 [2018-10-03 09:19:11,010 INFO L226 Difference]: Without dead ends: 140 [2018-10-03 09:19:11,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 1.0s impTime 45 [2018-10-03 09:19:11,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-03 09:19:11,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-10-03 09:19:11,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-03 09:19:11,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2018-10-03 09:19:11,015 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 137 [2018-10-03 09:19:11,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:11,015 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2018-10-03 09:19:11,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 09:19:11,016 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2018-10-03 09:19:11,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-03 09:19:11,016 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:11,016 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1] [2018-10-03 09:19:11,017 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:11,017 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:11,017 INFO L82 PathProgramCache]: Analyzing trace with hash -742027065, now seen corresponding path program 29 times [2018-10-03 09:19:11,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:11,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:11,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:11,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:11,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:11,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:11,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:11,701 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:19:11,782 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-03 09:19:11,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:11,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:12,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:12,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-03 09:19:12,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 09:19:12,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 09:19:12,024 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:12,024 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 48 states. [2018-10-03 09:19:12,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:12,131 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2018-10-03 09:19:12,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 09:19:12,131 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 137 [2018-10-03 09:19:12,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:12,132 INFO L225 Difference]: With dead ends: 146 [2018-10-03 09:19:12,132 INFO L226 Difference]: Without dead ends: 142 [2018-10-03 09:19:12,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 46 [2018-10-03 09:19:12,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-10-03 09:19:12,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-10-03 09:19:12,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-03 09:19:12,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2018-10-03 09:19:12,137 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 137 [2018-10-03 09:19:12,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:12,138 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2018-10-03 09:19:12,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 09:19:12,138 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2018-10-03 09:19:12,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-03 09:19:12,139 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:12,139 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1] [2018-10-03 09:19:12,139 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:12,139 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:12,139 INFO L82 PathProgramCache]: Analyzing trace with hash 467971093, now seen corresponding path program 45 times [2018-10-03 09:19:12,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:12,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:12,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:12,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:12,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:12,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 46 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:12,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:12,746 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:12,753 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:19:13,184 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2018-10-03 09:19:13,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:13,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 46 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:13,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:13,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-03 09:19:13,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 09:19:13,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 09:19:13,453 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:13,453 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 48 states. [2018-10-03 09:19:13,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:13,643 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2018-10-03 09:19:13,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 09:19:13,643 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 140 [2018-10-03 09:19:13,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:13,644 INFO L225 Difference]: With dead ends: 147 [2018-10-03 09:19:13,644 INFO L226 Difference]: Without dead ends: 143 [2018-10-03 09:19:13,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 46 [2018-10-03 09:19:13,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-03 09:19:13,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-03 09:19:13,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-03 09:19:13,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-10-03 09:19:13,649 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 140 [2018-10-03 09:19:13,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:13,649 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-10-03 09:19:13,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 09:19:13,649 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-10-03 09:19:13,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-03 09:19:13,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:13,650 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1] [2018-10-03 09:19:13,650 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:13,650 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:13,651 INFO L82 PathProgramCache]: Analyzing trace with hash 467971155, now seen corresponding path program 30 times [2018-10-03 09:19:13,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:13,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:13,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:13,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:13,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:13,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:14,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:14,633 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:14,640 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:19:14,718 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-10-03 09:19:14,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:14,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:14,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:14,987 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:14,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-03 09:19:14,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-03 09:19:14,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-03 09:19:14,989 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:14,989 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 49 states. [2018-10-03 09:19:15,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:15,106 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2018-10-03 09:19:15,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-03 09:19:15,107 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 140 [2018-10-03 09:19:15,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:15,108 INFO L225 Difference]: With dead ends: 149 [2018-10-03 09:19:15,108 INFO L226 Difference]: Without dead ends: 145 [2018-10-03 09:19:15,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.7s impTime 47 [2018-10-03 09:19:15,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-03 09:19:15,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-03 09:19:15,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-03 09:19:15,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-10-03 09:19:15,113 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 140 [2018-10-03 09:19:15,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:15,113 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-10-03 09:19:15,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-03 09:19:15,114 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-10-03 09:19:15,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-03 09:19:15,114 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:15,115 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1] [2018-10-03 09:19:15,115 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:15,115 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:15,115 INFO L82 PathProgramCache]: Analyzing trace with hash -135572215, now seen corresponding path program 46 times [2018-10-03 09:19:15,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:15,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:15,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:15,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:15,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:16,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 47 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:16,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:16,382 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:16,390 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:19:16,431 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:19:16,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:16,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 3290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:18,171 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:18,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-10-03 09:19:18,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-03 09:19:18,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-03 09:19:18,173 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:18,173 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 97 states. [2018-10-03 09:19:21,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:21,727 INFO L93 Difference]: Finished difference Result 152 states and 159 transitions. [2018-10-03 09:19:21,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-03 09:19:21,728 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 143 [2018-10-03 09:19:21,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:21,728 INFO L225 Difference]: With dead ends: 152 [2018-10-03 09:19:21,729 INFO L226 Difference]: Without dead ends: 148 [2018-10-03 09:19:21,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0s Time 5.4s impTime 96 [2018-10-03 09:19:21,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-03 09:19:21,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-10-03 09:19:21,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-03 09:19:21,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2018-10-03 09:19:21,733 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 143 [2018-10-03 09:19:21,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:21,733 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2018-10-03 09:19:21,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-03 09:19:21,733 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2018-10-03 09:19:21,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-03 09:19:21,734 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:21,734 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 1, 1, 1] [2018-10-03 09:19:21,734 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:21,734 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:21,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1561159787, now seen corresponding path program 47 times [2018-10-03 09:19:21,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:21,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:21,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:21,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:21,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:22,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 48 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:22,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:22,928 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:22,936 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:19:23,018 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-03 09:19:23,018 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:23,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:23,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 48 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:23,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:23,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-03 09:19:23,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 09:19:23,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 09:19:23,311 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:23,311 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 50 states. [2018-10-03 09:19:23,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:23,442 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2018-10-03 09:19:23,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 09:19:23,442 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 146 [2018-10-03 09:19:23,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:23,443 INFO L225 Difference]: With dead ends: 153 [2018-10-03 09:19:23,443 INFO L226 Difference]: Without dead ends: 149 [2018-10-03 09:19:23,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.9s impTime 48 [2018-10-03 09:19:23,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-03 09:19:23,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-03 09:19:23,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-03 09:19:23,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2018-10-03 09:19:23,447 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 146 [2018-10-03 09:19:23,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:23,447 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2018-10-03 09:19:23,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 09:19:23,447 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2018-10-03 09:19:23,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-03 09:19:23,448 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:23,448 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 1, 1] [2018-10-03 09:19:23,448 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:23,448 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:23,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1561159725, now seen corresponding path program 31 times [2018-10-03 09:19:23,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:23,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:23,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:23,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:23,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:24,311 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:24,311 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:24,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:19:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:24,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:24,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:24,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:24,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-03 09:19:24,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-03 09:19:24,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-03 09:19:24,617 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:24,617 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 51 states. [2018-10-03 09:19:24,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:24,745 INFO L93 Difference]: Finished difference Result 155 states and 161 transitions. [2018-10-03 09:19:24,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 09:19:24,745 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 146 [2018-10-03 09:19:24,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:24,746 INFO L225 Difference]: With dead ends: 155 [2018-10-03 09:19:24,746 INFO L226 Difference]: Without dead ends: 151 [2018-10-03 09:19:24,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.7s impTime 49 [2018-10-03 09:19:24,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-03 09:19:24,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-03 09:19:24,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-03 09:19:24,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-10-03 09:19:24,750 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 146 [2018-10-03 09:19:24,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:24,750 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-10-03 09:19:24,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-03 09:19:24,751 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-10-03 09:19:24,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-03 09:19:24,751 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:24,751 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 1, 1, 1] [2018-10-03 09:19:24,751 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:24,752 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:24,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1691072905, now seen corresponding path program 48 times [2018-10-03 09:19:24,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:24,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:24,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:24,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:19:24,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 49 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:25,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:25,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:25,852 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:19:25,940 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-10-03 09:19:25,941 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:25,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 0 proven. 3577 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:27,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:27,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-10-03 09:19:27,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-03 09:19:27,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-03 09:19:27,653 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:27,653 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 101 states. [2018-10-03 09:19:31,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:31,122 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2018-10-03 09:19:31,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-03 09:19:31,122 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 149 [2018-10-03 09:19:31,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:31,123 INFO L225 Difference]: With dead ends: 158 [2018-10-03 09:19:31,123 INFO L226 Difference]: Without dead ends: 154 [2018-10-03 09:19:31,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s Time 5.2s impTime 100 [2018-10-03 09:19:31,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-03 09:19:31,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-10-03 09:19:31,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-03 09:19:31,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2018-10-03 09:19:31,128 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 149 [2018-10-03 09:19:31,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:31,128 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2018-10-03 09:19:31,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-03 09:19:31,128 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2018-10-03 09:19:31,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-03 09:19:31,129 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:31,129 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 1, 1, 1] [2018-10-03 09:19:31,129 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:31,129 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:31,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1212030187, now seen corresponding path program 49 times [2018-10-03 09:19:31,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:31,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:31,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:31,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:31,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:31,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 50 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:31,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:31,931 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:31,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:19:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:31,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 50 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:32,240 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:32,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-03 09:19:32,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-03 09:19:32,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-03 09:19:32,241 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:32,241 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 52 states. [2018-10-03 09:19:32,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:32,385 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2018-10-03 09:19:32,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 09:19:32,385 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 152 [2018-10-03 09:19:32,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:32,386 INFO L225 Difference]: With dead ends: 159 [2018-10-03 09:19:32,386 INFO L226 Difference]: Without dead ends: 155 [2018-10-03 09:19:32,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 50 [2018-10-03 09:19:32,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-03 09:19:32,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-03 09:19:32,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-03 09:19:32,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-10-03 09:19:32,391 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 152 [2018-10-03 09:19:32,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:32,392 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-10-03 09:19:32,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-03 09:19:32,392 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-10-03 09:19:32,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-03 09:19:32,393 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:32,393 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 1, 1] [2018-10-03 09:19:32,393 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:32,393 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:32,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1212030125, now seen corresponding path program 32 times [2018-10-03 09:19:32,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:32,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:32,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:32,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:19:32,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:32,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:33,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:33,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:33,643 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:19:33,685 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:19:33,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:33,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:33,946 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:33,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-03 09:19:33,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 09:19:33,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 09:19:33,948 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:33,948 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 53 states. [2018-10-03 09:19:34,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:34,162 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2018-10-03 09:19:34,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 09:19:34,162 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 152 [2018-10-03 09:19:34,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:34,163 INFO L225 Difference]: With dead ends: 161 [2018-10-03 09:19:34,164 INFO L226 Difference]: Without dead ends: 157 [2018-10-03 09:19:34,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.1s impTime 51 [2018-10-03 09:19:34,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-03 09:19:34,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-03 09:19:34,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-03 09:19:34,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-10-03 09:19:34,169 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 152 [2018-10-03 09:19:34,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:34,170 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-10-03 09:19:34,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 09:19:34,170 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-10-03 09:19:34,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-03 09:19:34,171 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:34,171 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 1, 1, 1] [2018-10-03 09:19:34,171 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:34,171 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:34,171 INFO L82 PathProgramCache]: Analyzing trace with hash 200195593, now seen corresponding path program 50 times [2018-10-03 09:19:34,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:34,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:34,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:34,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:34,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 51 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:35,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:35,024 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 [2018-10-03 09:19:35,034 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:19:35,087 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:19:35,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:35,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 51 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:35,358 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:35,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-03 09:19:35,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 09:19:35,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 09:19:35,359 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:35,359 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 53 states. [2018-10-03 09:19:35,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:35,467 INFO L93 Difference]: Finished difference Result 162 states and 167 transitions. [2018-10-03 09:19:35,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 09:19:35,467 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 155 [2018-10-03 09:19:35,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:35,468 INFO L225 Difference]: With dead ends: 162 [2018-10-03 09:19:35,468 INFO L226 Difference]: Without dead ends: 158 [2018-10-03 09:19:35,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 51 [2018-10-03 09:19:35,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-03 09:19:35,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-10-03 09:19:35,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-03 09:19:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2018-10-03 09:19:35,472 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 155 [2018-10-03 09:19:35,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:35,473 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2018-10-03 09:19:35,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 09:19:35,473 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2018-10-03 09:19:35,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-03 09:19:35,474 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:35,474 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 1, 1] [2018-10-03 09:19:35,474 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:35,474 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:35,475 INFO L82 PathProgramCache]: Analyzing trace with hash 200195655, now seen corresponding path program 33 times [2018-10-03 09:19:35,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:35,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:35,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:35,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:35,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:36,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:36,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:36,525 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:36,544 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:19:36,633 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-03 09:19:36,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:36,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:37,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:37,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:37,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-03 09:19:37,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-03 09:19:37,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-03 09:19:37,085 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:37,086 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 54 states. [2018-10-03 09:19:37,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:37,182 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2018-10-03 09:19:37,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 09:19:37,183 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 155 [2018-10-03 09:19:37,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:37,184 INFO L225 Difference]: With dead ends: 164 [2018-10-03 09:19:37,184 INFO L226 Difference]: Without dead ends: 160 [2018-10-03 09:19:37,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime 52 [2018-10-03 09:19:37,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-03 09:19:37,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-10-03 09:19:37,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-03 09:19:37,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2018-10-03 09:19:37,187 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 155 [2018-10-03 09:19:37,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:37,188 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2018-10-03 09:19:37,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-03 09:19:37,188 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2018-10-03 09:19:37,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-03 09:19:37,189 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:37,189 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 1, 1, 1] [2018-10-03 09:19:37,189 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:37,189 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:37,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1681224043, now seen corresponding path program 51 times [2018-10-03 09:19:37,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:37,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:37,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:37,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:37,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:37,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 52 proven. 3978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:37,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:37,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:37,918 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:19:38,009 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2018-10-03 09:19:38,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:38,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:39,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:39,221 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:39,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-10-03 09:19:39,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-03 09:19:39,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-03 09:19:39,223 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:39,224 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 107 states. [2018-10-03 09:19:43,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:43,400 INFO L93 Difference]: Finished difference Result 167 states and 174 transitions. [2018-10-03 09:19:43,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-03 09:19:43,400 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 158 [2018-10-03 09:19:43,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:43,401 INFO L225 Difference]: With dead ends: 167 [2018-10-03 09:19:43,401 INFO L226 Difference]: Without dead ends: 163 [2018-10-03 09:19:43,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s Time 5.0s impTime 106 [2018-10-03 09:19:43,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-03 09:19:43,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-03 09:19:43,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-03 09:19:43,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2018-10-03 09:19:43,405 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 158 [2018-10-03 09:19:43,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:43,405 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2018-10-03 09:19:43,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-03 09:19:43,406 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2018-10-03 09:19:43,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-03 09:19:43,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:43,407 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 1, 1, 1] [2018-10-03 09:19:43,407 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:43,407 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:43,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1730387319, now seen corresponding path program 52 times [2018-10-03 09:19:43,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:43,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:43,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:43,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:43,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 53 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:44,461 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:44,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:44,469 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:19:44,514 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:19:44,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:44,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 53 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:44,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:44,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-03 09:19:44,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-03 09:19:44,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-03 09:19:44,785 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:44,786 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand 55 states. [2018-10-03 09:19:44,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:44,945 INFO L93 Difference]: Finished difference Result 168 states and 173 transitions. [2018-10-03 09:19:44,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-03 09:19:44,946 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 161 [2018-10-03 09:19:44,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:44,947 INFO L225 Difference]: With dead ends: 168 [2018-10-03 09:19:44,947 INFO L226 Difference]: Without dead ends: 164 [2018-10-03 09:19:44,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime 53 [2018-10-03 09:19:44,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-03 09:19:44,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-10-03 09:19:44,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-03 09:19:44,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2018-10-03 09:19:44,950 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 161 [2018-10-03 09:19:44,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:44,951 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2018-10-03 09:19:44,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-03 09:19:44,951 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2018-10-03 09:19:44,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-03 09:19:44,952 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:44,952 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 1, 1] [2018-10-03 09:19:44,952 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:44,952 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:44,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1730387257, now seen corresponding path program 34 times [2018-10-03 09:19:44,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:44,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:44,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:44,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:44,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:46,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:46,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:46,422 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:19:46,468 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:19:46,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:46,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:46,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:46,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-03 09:19:46,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-03 09:19:46,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-03 09:19:46,734 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:46,734 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 56 states. [2018-10-03 09:19:46,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:46,911 INFO L93 Difference]: Finished difference Result 170 states and 176 transitions. [2018-10-03 09:19:46,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 09:19:46,911 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 161 [2018-10-03 09:19:46,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:46,912 INFO L225 Difference]: With dead ends: 170 [2018-10-03 09:19:46,913 INFO L226 Difference]: Without dead ends: 166 [2018-10-03 09:19:46,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.3s impTime 54 [2018-10-03 09:19:46,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-03 09:19:46,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-10-03 09:19:46,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-03 09:19:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2018-10-03 09:19:46,917 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 161 [2018-10-03 09:19:46,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:46,917 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2018-10-03 09:19:46,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-03 09:19:46,917 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2018-10-03 09:19:46,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-03 09:19:46,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:46,918 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1] [2018-10-03 09:19:46,918 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:46,918 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:46,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1769694699, now seen corresponding path program 53 times [2018-10-03 09:19:46,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:46,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:46,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:46,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:46,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:46,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 54 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:47,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:47,721 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:47,729 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:19:47,829 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-10-03 09:19:47,829 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:47,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:48,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 54 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:48,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:48,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-03 09:19:48,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-03 09:19:48,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-03 09:19:48,108 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:48,108 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 56 states. [2018-10-03 09:19:48,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:48,223 INFO L93 Difference]: Finished difference Result 171 states and 176 transitions. [2018-10-03 09:19:48,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 09:19:48,223 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 164 [2018-10-03 09:19:48,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:48,224 INFO L225 Difference]: With dead ends: 171 [2018-10-03 09:19:48,225 INFO L226 Difference]: Without dead ends: 167 [2018-10-03 09:19:48,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 54 [2018-10-03 09:19:48,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-03 09:19:48,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-03 09:19:48,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-03 09:19:48,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2018-10-03 09:19:48,228 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 164 [2018-10-03 09:19:48,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:48,229 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2018-10-03 09:19:48,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-03 09:19:48,229 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2018-10-03 09:19:48,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-03 09:19:48,230 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:48,230 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 1, 1] [2018-10-03 09:19:48,230 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:48,230 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:48,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1769694637, now seen corresponding path program 35 times [2018-10-03 09:19:48,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:48,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:48,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:48,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:48,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:49,411 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:49,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:49,428 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:19:49,526 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-10-03 09:19:49,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:49,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:50,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:50,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:50,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-03 09:19:50,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-03 09:19:50,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-03 09:19:50,053 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:50,053 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 57 states. [2018-10-03 09:19:50,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:50,188 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2018-10-03 09:19:50,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-03 09:19:50,188 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 164 [2018-10-03 09:19:50,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:50,189 INFO L225 Difference]: With dead ends: 173 [2018-10-03 09:19:50,189 INFO L226 Difference]: Without dead ends: 169 [2018-10-03 09:19:50,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 0.9s impTime 55 [2018-10-03 09:19:50,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-03 09:19:50,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-03 09:19:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-03 09:19:50,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2018-10-03 09:19:50,192 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 164 [2018-10-03 09:19:50,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:50,193 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2018-10-03 09:19:50,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-03 09:19:50,193 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2018-10-03 09:19:50,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-03 09:19:50,193 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:50,194 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 1, 1, 1] [2018-10-03 09:19:50,194 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:50,194 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:50,194 INFO L82 PathProgramCache]: Analyzing trace with hash -249780471, now seen corresponding path program 54 times [2018-10-03 09:19:50,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:50,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:50,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:50,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:50,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 55 proven. 4455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:51,037 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:51,037 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:51,044 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:19:51,161 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2018-10-03 09:19:51,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:51,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:52,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 0 proven. 4510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:52,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:52,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-10-03 09:19:52,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-10-03 09:19:52,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-10-03 09:19:52,648 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:52,648 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 113 states. [2018-10-03 09:19:57,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:57,505 INFO L93 Difference]: Finished difference Result 176 states and 183 transitions. [2018-10-03 09:19:57,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-10-03 09:19:57,505 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 167 [2018-10-03 09:19:57,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:57,506 INFO L225 Difference]: With dead ends: 176 [2018-10-03 09:19:57,506 INFO L226 Difference]: Without dead ends: 172 [2018-10-03 09:19:57,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6s Time 6.0s impTime 112 [2018-10-03 09:19:57,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-10-03 09:19:57,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-10-03 09:19:57,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-03 09:19:57,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2018-10-03 09:19:57,510 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 167 [2018-10-03 09:19:57,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:57,510 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2018-10-03 09:19:57,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-10-03 09:19:57,510 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2018-10-03 09:19:57,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-03 09:19:57,511 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:57,511 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 1, 1, 1] [2018-10-03 09:19:57,511 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:57,511 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:57,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1969751445, now seen corresponding path program 55 times [2018-10-03 09:19:57,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:57,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:57,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:57,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:57,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:57,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 56 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:58,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:58,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:58,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:19:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:58,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 56 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:58,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:58,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-03 09:19:58,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-03 09:19:58,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-03 09:19:58,725 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:58,725 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand 58 states. [2018-10-03 09:19:58,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:58,843 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2018-10-03 09:19:58,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-03 09:19:58,844 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 170 [2018-10-03 09:19:58,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:58,845 INFO L225 Difference]: With dead ends: 177 [2018-10-03 09:19:58,845 INFO L226 Difference]: Without dead ends: 173 [2018-10-03 09:19:58,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 56 [2018-10-03 09:19:58,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-03 09:19:58,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-03 09:19:58,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-03 09:19:58,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2018-10-03 09:19:58,849 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 170 [2018-10-03 09:19:58,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:58,849 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2018-10-03 09:19:58,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-03 09:19:58,849 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2018-10-03 09:19:58,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-03 09:19:58,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:58,850 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 56, 1, 1] [2018-10-03 09:19:58,850 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:58,850 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:58,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1969751507, now seen corresponding path program 36 times [2018-10-03 09:19:58,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:58,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:58,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:58,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:19:58,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:58,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:00,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:00,320 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:00,320 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:00,327 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:20:00,432 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2018-10-03 09:20:00,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:00,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:00,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:00,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:00,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-03 09:20:00,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 09:20:00,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 09:20:00,728 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:00,728 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 59 states. [2018-10-03 09:20:00,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:00,867 INFO L93 Difference]: Finished difference Result 179 states and 185 transitions. [2018-10-03 09:20:00,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 09:20:00,867 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 170 [2018-10-03 09:20:00,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:00,869 INFO L225 Difference]: With dead ends: 179 [2018-10-03 09:20:00,869 INFO L226 Difference]: Without dead ends: 175 [2018-10-03 09:20:00,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.3s impTime 57 [2018-10-03 09:20:00,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-03 09:20:00,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-03 09:20:00,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-03 09:20:00,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-10-03 09:20:00,873 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2018-10-03 09:20:00,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:00,873 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-10-03 09:20:00,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 09:20:00,874 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-10-03 09:20:00,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-03 09:20:00,874 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:00,874 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 56, 1, 1, 1] [2018-10-03 09:20:00,875 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:00,875 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:00,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1271428215, now seen corresponding path program 56 times [2018-10-03 09:20:00,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:00,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:00,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:00,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:00,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 57 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:02,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:02,316 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:02,323 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:20:02,373 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:20:02,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:02,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:02,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 57 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:02,684 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:02,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-03 09:20:02,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 09:20:02,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 09:20:02,685 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:02,685 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 59 states. [2018-10-03 09:20:02,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:02,865 INFO L93 Difference]: Finished difference Result 180 states and 185 transitions. [2018-10-03 09:20:02,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 09:20:02,865 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 173 [2018-10-03 09:20:02,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:02,866 INFO L225 Difference]: With dead ends: 180 [2018-10-03 09:20:02,866 INFO L226 Difference]: Without dead ends: 176 [2018-10-03 09:20:02,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.2s impTime 57 [2018-10-03 09:20:02,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-03 09:20:02,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-10-03 09:20:02,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-03 09:20:02,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2018-10-03 09:20:02,870 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 173 [2018-10-03 09:20:02,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:02,871 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2018-10-03 09:20:02,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 09:20:02,871 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2018-10-03 09:20:02,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-03 09:20:02,872 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:02,872 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 57, 1, 1] [2018-10-03 09:20:02,872 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:02,872 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:02,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1271428153, now seen corresponding path program 37 times [2018-10-03 09:20:02,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:02,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:02,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:02,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:02,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:04,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:04,055 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:04,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:20:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:04,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:04,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:04,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:04,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-03 09:20:04,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-03 09:20:04,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-03 09:20:04,420 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:04,421 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 60 states. [2018-10-03 09:20:04,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:04,605 INFO L93 Difference]: Finished difference Result 182 states and 188 transitions. [2018-10-03 09:20:04,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-03 09:20:04,605 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 173 [2018-10-03 09:20:04,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:04,606 INFO L225 Difference]: With dead ends: 182 [2018-10-03 09:20:04,606 INFO L226 Difference]: Without dead ends: 178 [2018-10-03 09:20:04,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime 58 [2018-10-03 09:20:04,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-10-03 09:20:04,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-10-03 09:20:04,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-03 09:20:04,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2018-10-03 09:20:04,612 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 173 [2018-10-03 09:20:04,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:04,612 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2018-10-03 09:20:04,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-03 09:20:04,612 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2018-10-03 09:20:04,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-03 09:20:04,613 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:04,613 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 57, 1, 1, 1] [2018-10-03 09:20:04,613 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:04,613 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:04,614 INFO L82 PathProgramCache]: Analyzing trace with hash 200069397, now seen corresponding path program 57 times [2018-10-03 09:20:04,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:04,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:04,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:04,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:20:04,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 58 proven. 4959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:05,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:05,915 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:05,922 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:20:06,030 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2018-10-03 09:20:06,031 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:06,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:08,527 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:08,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-10-03 09:20:08,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-10-03 09:20:08,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-10-03 09:20:08,528 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:08,528 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 119 states. [2018-10-03 09:20:13,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:13,063 INFO L93 Difference]: Finished difference Result 185 states and 192 transitions. [2018-10-03 09:20:13,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-10-03 09:20:13,063 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 176 [2018-10-03 09:20:13,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:13,064 INFO L225 Difference]: With dead ends: 185 [2018-10-03 09:20:13,064 INFO L226 Difference]: Without dead ends: 181 [2018-10-03 09:20:13,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7s Time 7.1s impTime 118 [2018-10-03 09:20:13,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-03 09:20:13,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-03 09:20:13,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-03 09:20:13,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-10-03 09:20:13,068 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 176 [2018-10-03 09:20:13,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:13,069 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-10-03 09:20:13,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-10-03 09:20:13,069 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-10-03 09:20:13,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-03 09:20:13,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:13,070 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 58, 1, 1, 1] [2018-10-03 09:20:13,070 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:13,070 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:13,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1145761783, now seen corresponding path program 58 times [2018-10-03 09:20:13,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:13,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:13,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:13,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:13,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 59 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:14,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:14,089 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:14,099 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:20:14,149 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:20:14,149 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:14,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 59 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:14,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:14,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-03 09:20:14,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-03 09:20:14,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-03 09:20:14,596 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:14,596 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 61 states. [2018-10-03 09:20:14,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:14,758 INFO L93 Difference]: Finished difference Result 186 states and 191 transitions. [2018-10-03 09:20:14,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-03 09:20:14,758 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 179 [2018-10-03 09:20:14,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:14,759 INFO L225 Difference]: With dead ends: 186 [2018-10-03 09:20:14,759 INFO L226 Difference]: Without dead ends: 182 [2018-10-03 09:20:14,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.7s impTime 59 [2018-10-03 09:20:14,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-03 09:20:14,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-10-03 09:20:14,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-03 09:20:14,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2018-10-03 09:20:14,763 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 179 [2018-10-03 09:20:14,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:14,763 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2018-10-03 09:20:14,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-03 09:20:14,763 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2018-10-03 09:20:14,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-03 09:20:14,763 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:14,764 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 59, 1, 1] [2018-10-03 09:20:14,764 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:14,764 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:14,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1145761721, now seen corresponding path program 38 times [2018-10-03 09:20:14,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:14,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:14,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:14,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:14,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:15,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:15,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:15,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:15,489 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:20:15,537 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:20:15,537 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:15,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:15,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:15,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:15,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-03 09:20:15,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-03 09:20:15,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-03 09:20:15,845 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:15,845 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 62 states. [2018-10-03 09:20:16,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:16,013 INFO L93 Difference]: Finished difference Result 188 states and 194 transitions. [2018-10-03 09:20:16,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-03 09:20:16,013 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 179 [2018-10-03 09:20:16,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:16,014 INFO L225 Difference]: With dead ends: 188 [2018-10-03 09:20:16,015 INFO L226 Difference]: Without dead ends: 184 [2018-10-03 09:20:16,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 60 [2018-10-03 09:20:16,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-10-03 09:20:16,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-10-03 09:20:16,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-03 09:20:16,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2018-10-03 09:20:16,019 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 179 [2018-10-03 09:20:16,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:16,019 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2018-10-03 09:20:16,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-03 09:20:16,019 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2018-10-03 09:20:16,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-03 09:20:16,019 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:16,020 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 59, 1, 1, 1] [2018-10-03 09:20:16,020 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:16,020 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:16,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1282737003, now seen corresponding path program 59 times [2018-10-03 09:20:16,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:16,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:16,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:16,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:16,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 60 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:16,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:16,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:16,607 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:20:16,737 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-10-03 09:20:16,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:16,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 60 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:17,152 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:17,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-03 09:20:17,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-03 09:20:17,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-03 09:20:17,153 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:17,153 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand 62 states. [2018-10-03 09:20:17,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:17,268 INFO L93 Difference]: Finished difference Result 189 states and 194 transitions. [2018-10-03 09:20:17,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-03 09:20:17,268 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 182 [2018-10-03 09:20:17,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:17,270 INFO L225 Difference]: With dead ends: 189 [2018-10-03 09:20:17,270 INFO L226 Difference]: Without dead ends: 185 [2018-10-03 09:20:17,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 60 [2018-10-03 09:20:17,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-03 09:20:17,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-10-03 09:20:17,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-03 09:20:17,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-10-03 09:20:17,274 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 182 [2018-10-03 09:20:17,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:17,274 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-10-03 09:20:17,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-03 09:20:17,274 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-10-03 09:20:17,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-03 09:20:17,275 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:17,275 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 60, 1, 1] [2018-10-03 09:20:17,275 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:17,275 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:17,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1282736941, now seen corresponding path program 39 times [2018-10-03 09:20:17,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:17,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:17,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:17,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:17,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:18,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:18,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:18,101 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:20:18,214 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 61 check-sat command(s) [2018-10-03 09:20:18,214 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:18,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:18,533 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:18,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-03 09:20:18,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-03 09:20:18,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-03 09:20:18,534 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:18,534 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 63 states. [2018-10-03 09:20:18,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:18,711 INFO L93 Difference]: Finished difference Result 191 states and 197 transitions. [2018-10-03 09:20:18,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-03 09:20:18,712 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 182 [2018-10-03 09:20:18,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:18,713 INFO L225 Difference]: With dead ends: 191 [2018-10-03 09:20:18,713 INFO L226 Difference]: Without dead ends: 187 [2018-10-03 09:20:18,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 61 [2018-10-03 09:20:18,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-03 09:20:18,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-03 09:20:18,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-03 09:20:18,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2018-10-03 09:20:18,718 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 182 [2018-10-03 09:20:18,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:18,718 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2018-10-03 09:20:18,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-03 09:20:18,718 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2018-10-03 09:20:18,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-10-03 09:20:18,719 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:18,719 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 60, 1, 1, 1] [2018-10-03 09:20:18,719 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:18,720 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:18,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1692584823, now seen corresponding path program 60 times [2018-10-03 09:20:18,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:18,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:18,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:18,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:18,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 61 proven. 5490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:19,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:19,442 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:19,451 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:20:19,564 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2018-10-03 09:20:19,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:19,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:20,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 0 proven. 5551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:20,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:20,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-10-03 09:20:20,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-10-03 09:20:20,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-10-03 09:20:20,807 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:20,808 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand 125 states. [2018-10-03 09:20:25,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:25,621 INFO L93 Difference]: Finished difference Result 194 states and 201 transitions. [2018-10-03 09:20:25,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-10-03 09:20:25,621 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 185 [2018-10-03 09:20:25,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:25,622 INFO L225 Difference]: With dead ends: 194 [2018-10-03 09:20:25,622 INFO L226 Difference]: Without dead ends: 190 [2018-10-03 09:20:25,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1s Time 5.4s impTime 124 [2018-10-03 09:20:25,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-10-03 09:20:25,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-10-03 09:20:25,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-10-03 09:20:25,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2018-10-03 09:20:25,625 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 185 [2018-10-03 09:20:25,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:25,626 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2018-10-03 09:20:25,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-10-03 09:20:25,626 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2018-10-03 09:20:25,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-03 09:20:25,626 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:25,627 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 61, 1, 1, 1] [2018-10-03 09:20:25,627 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:25,627 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:25,627 INFO L82 PathProgramCache]: Analyzing trace with hash -876967915, now seen corresponding path program 61 times [2018-10-03 09:20:25,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:25,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:25,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:25,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:25,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:26,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 62 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:26,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:26,354 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:26,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:20:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:26,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 62 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:26,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:26,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-03 09:20:26,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-03 09:20:26,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-03 09:20:26,738 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:26,738 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 64 states. [2018-10-03 09:20:26,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:26,929 INFO L93 Difference]: Finished difference Result 195 states and 200 transitions. [2018-10-03 09:20:26,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-03 09:20:26,930 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 188 [2018-10-03 09:20:26,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:26,931 INFO L225 Difference]: With dead ends: 195 [2018-10-03 09:20:26,931 INFO L226 Difference]: Without dead ends: 191 [2018-10-03 09:20:26,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 62 [2018-10-03 09:20:26,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-03 09:20:26,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-03 09:20:26,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-03 09:20:26,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-10-03 09:20:26,936 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 188 [2018-10-03 09:20:26,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:26,936 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-10-03 09:20:26,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-03 09:20:26,936 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-10-03 09:20:26,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-03 09:20:26,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:26,938 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 62, 1, 1] [2018-10-03 09:20:26,938 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:26,938 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:26,938 INFO L82 PathProgramCache]: Analyzing trace with hash -876967853, now seen corresponding path program 40 times [2018-10-03 09:20:26,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:26,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:26,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:26,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:20:26,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:27,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:27,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:27,696 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:27,703 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:20:27,755 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:20:27,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:27,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:28,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:28,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-03 09:20:28,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-03 09:20:28,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-03 09:20:28,091 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:28,092 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 65 states. [2018-10-03 09:20:28,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:28,224 INFO L93 Difference]: Finished difference Result 197 states and 203 transitions. [2018-10-03 09:20:28,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-03 09:20:28,224 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 188 [2018-10-03 09:20:28,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:28,226 INFO L225 Difference]: With dead ends: 197 [2018-10-03 09:20:28,226 INFO L226 Difference]: Without dead ends: 193 [2018-10-03 09:20:28,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 63 [2018-10-03 09:20:28,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-03 09:20:28,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-10-03 09:20:28,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-03 09:20:28,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2018-10-03 09:20:28,231 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 188 [2018-10-03 09:20:28,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:28,231 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2018-10-03 09:20:28,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-03 09:20:28,231 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2018-10-03 09:20:28,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-03 09:20:28,232 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:28,232 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 62, 1, 1, 1] [2018-10-03 09:20:28,232 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:28,232 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:28,232 INFO L82 PathProgramCache]: Analyzing trace with hash 536344841, now seen corresponding path program 62 times [2018-10-03 09:20:28,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:28,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:28,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:28,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:28,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:28,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 63 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:28,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:28,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:28,986 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:20:29,040 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:20:29,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:29,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:29,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 63 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:29,431 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:29,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-03 09:20:29,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-03 09:20:29,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-03 09:20:29,432 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:29,432 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand 65 states. [2018-10-03 09:20:29,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:29,581 INFO L93 Difference]: Finished difference Result 198 states and 203 transitions. [2018-10-03 09:20:29,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-03 09:20:29,581 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 191 [2018-10-03 09:20:29,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:29,582 INFO L225 Difference]: With dead ends: 198 [2018-10-03 09:20:29,582 INFO L226 Difference]: Without dead ends: 194 [2018-10-03 09:20:29,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 63 [2018-10-03 09:20:29,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-03 09:20:29,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2018-10-03 09:20:29,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-10-03 09:20:29,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 196 transitions. [2018-10-03 09:20:29,586 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 196 transitions. Word has length 191 [2018-10-03 09:20:29,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:29,586 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 196 transitions. [2018-10-03 09:20:29,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-03 09:20:29,586 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 196 transitions. [2018-10-03 09:20:29,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-03 09:20:29,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:29,587 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 63, 1, 1] [2018-10-03 09:20:29,587 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:29,587 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:29,588 INFO L82 PathProgramCache]: Analyzing trace with hash 536344903, now seen corresponding path program 41 times [2018-10-03 09:20:29,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:29,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:29,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:29,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:29,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:30,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:30,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:30,506 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:20:30,625 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-10-03 09:20:30,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:30,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:30,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:30,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-03 09:20:30,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-03 09:20:30,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-03 09:20:30,950 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:30,950 INFO L87 Difference]: Start difference. First operand 194 states and 196 transitions. Second operand 66 states. [2018-10-03 09:20:31,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:31,094 INFO L93 Difference]: Finished difference Result 200 states and 206 transitions. [2018-10-03 09:20:31,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-03 09:20:31,094 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 191 [2018-10-03 09:20:31,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:31,095 INFO L225 Difference]: With dead ends: 200 [2018-10-03 09:20:31,095 INFO L226 Difference]: Without dead ends: 196 [2018-10-03 09:20:31,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 64 [2018-10-03 09:20:31,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-10-03 09:20:31,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-10-03 09:20:31,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-03 09:20:31,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2018-10-03 09:20:31,100 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 191 [2018-10-03 09:20:31,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:31,100 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2018-10-03 09:20:31,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-03 09:20:31,100 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2018-10-03 09:20:31,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-03 09:20:31,101 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:31,101 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 63, 1, 1, 1] [2018-10-03 09:20:31,102 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:31,102 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:31,102 INFO L82 PathProgramCache]: Analyzing trace with hash 972256149, now seen corresponding path program 63 times [2018-10-03 09:20:31,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:31,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:31,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:31,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:31,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 64 proven. 6048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:31,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:31,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:31,809 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:20:31,935 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2018-10-03 09:20:31,935 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:31,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:33,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:33,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:33,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-10-03 09:20:33,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-10-03 09:20:33,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-10-03 09:20:33,495 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:33,495 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 131 states. [2018-10-03 09:20:38,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:38,463 INFO L93 Difference]: Finished difference Result 203 states and 210 transitions. [2018-10-03 09:20:38,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-10-03 09:20:38,464 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 194 [2018-10-03 09:20:38,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:38,464 INFO L225 Difference]: With dead ends: 203 [2018-10-03 09:20:38,464 INFO L226 Difference]: Without dead ends: 199 [2018-10-03 09:20:38,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s Time 5.9s impTime 130 [2018-10-03 09:20:38,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-03 09:20:38,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-10-03 09:20:38,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-03 09:20:38,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2018-10-03 09:20:38,469 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 194 [2018-10-03 09:20:38,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:38,469 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2018-10-03 09:20:38,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-10-03 09:20:38,469 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2018-10-03 09:20:38,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-03 09:20:38,470 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:38,470 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 64, 1, 1, 1] [2018-10-03 09:20:38,470 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:38,470 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:38,470 INFO L82 PathProgramCache]: Analyzing trace with hash -775070327, now seen corresponding path program 64 times [2018-10-03 09:20:38,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:38,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:38,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:38,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:38,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:39,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 65 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:39,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:39,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:39,431 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:20:39,487 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:20:39,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:39,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:39,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 65 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:39,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:39,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-03 09:20:39,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-03 09:20:39,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-03 09:20:39,888 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:39,888 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 67 states. [2018-10-03 09:20:40,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:40,082 INFO L93 Difference]: Finished difference Result 204 states and 209 transitions. [2018-10-03 09:20:40,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-03 09:20:40,082 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 197 [2018-10-03 09:20:40,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:40,083 INFO L225 Difference]: With dead ends: 204 [2018-10-03 09:20:40,083 INFO L226 Difference]: Without dead ends: 200 [2018-10-03 09:20:40,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.7s impTime 65 [2018-10-03 09:20:40,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-10-03 09:20:40,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-10-03 09:20:40,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-10-03 09:20:40,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2018-10-03 09:20:40,090 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 197 [2018-10-03 09:20:40,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:40,091 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2018-10-03 09:20:40,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-03 09:20:40,091 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2018-10-03 09:20:40,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-03 09:20:40,091 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:40,092 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 65, 1, 1] [2018-10-03 09:20:40,092 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:40,092 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:40,092 INFO L82 PathProgramCache]: Analyzing trace with hash -775070265, now seen corresponding path program 42 times [2018-10-03 09:20:40,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:40,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:40,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:40,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:40,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:40,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:40,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:40,756 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:40,763 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:20:40,885 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 66 check-sat command(s) [2018-10-03 09:20:40,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:40,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:41,220 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:41,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-03 09:20:41,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-03 09:20:41,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-03 09:20:41,221 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:41,221 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 68 states. [2018-10-03 09:20:41,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:41,371 INFO L93 Difference]: Finished difference Result 206 states and 212 transitions. [2018-10-03 09:20:41,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-03 09:20:41,372 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 197 [2018-10-03 09:20:41,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:41,372 INFO L225 Difference]: With dead ends: 206 [2018-10-03 09:20:41,373 INFO L226 Difference]: Without dead ends: 202 [2018-10-03 09:20:41,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 66 [2018-10-03 09:20:41,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-10-03 09:20:41,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-10-03 09:20:41,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-10-03 09:20:41,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 204 transitions. [2018-10-03 09:20:41,378 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 204 transitions. Word has length 197 [2018-10-03 09:20:41,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:41,378 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 204 transitions. [2018-10-03 09:20:41,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-03 09:20:41,378 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 204 transitions. [2018-10-03 09:20:41,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-03 09:20:41,378 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:41,378 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 65, 1, 1, 1] [2018-10-03 09:20:41,379 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:41,379 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:41,379 INFO L82 PathProgramCache]: Analyzing trace with hash -374489323, now seen corresponding path program 65 times [2018-10-03 09:20:41,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:41,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:41,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:41,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:41,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 66 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:42,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:42,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:42,599 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:20:42,725 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-10-03 09:20:42,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:42,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:43,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 66 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:43,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:43,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-03 09:20:43,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-03 09:20:43,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-03 09:20:43,064 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:43,064 INFO L87 Difference]: Start difference. First operand 202 states and 204 transitions. Second operand 68 states. [2018-10-03 09:20:43,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:43,281 INFO L93 Difference]: Finished difference Result 207 states and 212 transitions. [2018-10-03 09:20:43,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-03 09:20:43,282 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 200 [2018-10-03 09:20:43,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:43,282 INFO L225 Difference]: With dead ends: 207 [2018-10-03 09:20:43,282 INFO L226 Difference]: Without dead ends: 203 [2018-10-03 09:20:43,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime 66 [2018-10-03 09:20:43,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-03 09:20:43,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-10-03 09:20:43,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-03 09:20:43,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2018-10-03 09:20:43,287 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 200 [2018-10-03 09:20:43,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:43,287 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2018-10-03 09:20:43,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-03 09:20:43,287 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2018-10-03 09:20:43,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-03 09:20:43,288 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:43,288 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 66, 1, 1] [2018-10-03 09:20:43,288 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:43,288 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:43,289 INFO L82 PathProgramCache]: Analyzing trace with hash -374489261, now seen corresponding path program 43 times [2018-10-03 09:20:43,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:43,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:43,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:43,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:43,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:43,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:43,977 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:43,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:20:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:44,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:44,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:44,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:44,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-03 09:20:44,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-03 09:20:44,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-03 09:20:44,385 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:44,385 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 69 states. [2018-10-03 09:20:44,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:44,539 INFO L93 Difference]: Finished difference Result 209 states and 215 transitions. [2018-10-03 09:20:44,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-03 09:20:44,540 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 200 [2018-10-03 09:20:44,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:44,541 INFO L225 Difference]: With dead ends: 209 [2018-10-03 09:20:44,541 INFO L226 Difference]: Without dead ends: 205 [2018-10-03 09:20:44,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 67 [2018-10-03 09:20:44,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-10-03 09:20:44,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-10-03 09:20:44,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-03 09:20:44,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-10-03 09:20:44,546 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 200 [2018-10-03 09:20:44,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:44,546 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-10-03 09:20:44,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-03 09:20:44,546 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-10-03 09:20:44,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-10-03 09:20:44,546 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:44,547 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 66, 1, 1, 1] [2018-10-03 09:20:44,547 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:44,547 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:44,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1915052553, now seen corresponding path program 66 times [2018-10-03 09:20:44,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:44,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:44,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:44,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:20:44,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 67 proven. 6633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:45,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:45,529 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:45,536 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:20:45,661 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-10-03 09:20:45,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:45,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 0 proven. 6700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:47,891 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:47,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-10-03 09:20:47,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-10-03 09:20:47,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-10-03 09:20:47,892 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:47,892 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 137 states. [2018-10-03 09:20:52,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:52,915 INFO L93 Difference]: Finished difference Result 212 states and 219 transitions. [2018-10-03 09:20:52,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-10-03 09:20:52,916 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 203 [2018-10-03 09:20:52,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:52,916 INFO L225 Difference]: With dead ends: 212 [2018-10-03 09:20:52,916 INFO L226 Difference]: Without dead ends: 208 [2018-10-03 09:20:52,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5s Time 6.8s impTime 136 [2018-10-03 09:20:52,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-10-03 09:20:52,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-10-03 09:20:52,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-03 09:20:52,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 210 transitions. [2018-10-03 09:20:52,921 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 210 transitions. Word has length 203 [2018-10-03 09:20:52,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:52,922 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 210 transitions. [2018-10-03 09:20:52,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-10-03 09:20:52,922 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 210 transitions. [2018-10-03 09:20:52,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-03 09:20:52,923 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:52,923 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 67, 1, 1, 1] [2018-10-03 09:20:52,923 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:52,923 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:52,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1281452693, now seen corresponding path program 67 times [2018-10-03 09:20:52,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:52,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:52,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:52,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:52,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 68 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:53,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:53,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:53,805 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:20:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:53,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 68 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:54,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:54,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-03 09:20:54,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-03 09:20:54,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-03 09:20:54,238 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:54,238 INFO L87 Difference]: Start difference. First operand 208 states and 210 transitions. Second operand 70 states. [2018-10-03 09:20:54,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:54,427 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2018-10-03 09:20:54,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-03 09:20:54,427 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 206 [2018-10-03 09:20:54,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:54,428 INFO L225 Difference]: With dead ends: 213 [2018-10-03 09:20:54,428 INFO L226 Difference]: Without dead ends: 209 [2018-10-03 09:20:54,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 68 [2018-10-03 09:20:54,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-10-03 09:20:54,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-10-03 09:20:54,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-03 09:20:54,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2018-10-03 09:20:54,433 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 206 [2018-10-03 09:20:54,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:54,433 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2018-10-03 09:20:54,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-03 09:20:54,433 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2018-10-03 09:20:54,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-03 09:20:54,433 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:54,434 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 68, 1, 1] [2018-10-03 09:20:54,434 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:54,434 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:54,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1281452755, now seen corresponding path program 44 times [2018-10-03 09:20:54,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:54,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:54,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:54,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:20:54,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:55,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:55,542 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:55,549 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:20:55,608 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:20:55,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:55,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:55,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:55,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-03 09:20:55,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-03 09:20:55,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-03 09:20:55,981 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:55,981 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 71 states. [2018-10-03 09:20:56,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:56,227 INFO L93 Difference]: Finished difference Result 215 states and 221 transitions. [2018-10-03 09:20:56,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-03 09:20:56,227 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 206 [2018-10-03 09:20:56,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:56,228 INFO L225 Difference]: With dead ends: 215 [2018-10-03 09:20:56,228 INFO L226 Difference]: Without dead ends: 211 [2018-10-03 09:20:56,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.9s impTime 69 [2018-10-03 09:20:56,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-03 09:20:56,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-10-03 09:20:56,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-10-03 09:20:56,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-10-03 09:20:56,232 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 206 [2018-10-03 09:20:56,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:56,233 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-10-03 09:20:56,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-03 09:20:56,233 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-10-03 09:20:56,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-03 09:20:56,233 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:56,234 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 68, 1, 1, 1] [2018-10-03 09:20:56,234 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:56,234 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:56,234 INFO L82 PathProgramCache]: Analyzing trace with hash 2089289353, now seen corresponding path program 68 times [2018-10-03 09:20:56,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:56,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:56,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:56,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:56,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 69 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:57,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:57,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:57,259 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:20:57,332 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:20:57,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:57,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:57,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 69 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:57,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:57,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-03 09:20:57,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-03 09:20:57,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-03 09:20:57,838 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:57,838 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 71 states. [2018-10-03 09:20:58,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:58,059 INFO L93 Difference]: Finished difference Result 216 states and 221 transitions. [2018-10-03 09:20:58,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-03 09:20:58,060 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 209 [2018-10-03 09:20:58,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:58,061 INFO L225 Difference]: With dead ends: 216 [2018-10-03 09:20:58,061 INFO L226 Difference]: Without dead ends: 212 [2018-10-03 09:20:58,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime 69 [2018-10-03 09:20:58,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-10-03 09:20:58,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2018-10-03 09:20:58,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-10-03 09:20:58,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 214 transitions. [2018-10-03 09:20:58,064 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 214 transitions. Word has length 209 [2018-10-03 09:20:58,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:58,065 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 214 transitions. [2018-10-03 09:20:58,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-03 09:20:58,065 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 214 transitions. [2018-10-03 09:20:58,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-03 09:20:58,065 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:58,065 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 69, 1, 1] [2018-10-03 09:20:58,065 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:58,066 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:58,066 INFO L82 PathProgramCache]: Analyzing trace with hash 2089289415, now seen corresponding path program 45 times [2018-10-03 09:20:58,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:58,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:58,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:58,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:58,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 7107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:59,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:59,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:59,162 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:20:59,302 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-03 09:20:59,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:59,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:59,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 7107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:59,669 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:59,670 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-03 09:20:59,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-03 09:20:59,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-03 09:20:59,671 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:59,671 INFO L87 Difference]: Start difference. First operand 212 states and 214 transitions. Second operand 72 states. [2018-10-03 09:20:59,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:59,923 INFO L93 Difference]: Finished difference Result 218 states and 224 transitions. [2018-10-03 09:20:59,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-03 09:20:59,924 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 209 [2018-10-03 09:20:59,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:59,924 INFO L225 Difference]: With dead ends: 218 [2018-10-03 09:20:59,924 INFO L226 Difference]: Without dead ends: 214 [2018-10-03 09:20:59,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 70 [2018-10-03 09:20:59,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-10-03 09:20:59,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2018-10-03 09:20:59,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-10-03 09:20:59,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2018-10-03 09:20:59,928 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 209 [2018-10-03 09:20:59,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:59,928 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2018-10-03 09:20:59,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-03 09:20:59,928 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2018-10-03 09:20:59,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-03 09:20:59,928 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:59,929 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 69, 1, 1, 1] [2018-10-03 09:20:59,929 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:59,929 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:59,929 INFO L82 PathProgramCache]: Analyzing trace with hash -645499371, now seen corresponding path program 69 times [2018-10-03 09:20:59,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:59,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:59,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:59,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:59,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:21:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 70 proven. 7245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:01,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:21:01,128 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:21:01,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:21:01,279 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 71 check-sat command(s) [2018-10-03 09:21:01,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:01,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:02,511 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:21:02,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-10-03 09:21:02,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-10-03 09:21:02,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-10-03 09:21:02,513 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:02,513 INFO L87 Difference]: Start difference. First operand 214 states and 216 transitions. Second operand 143 states. [2018-10-03 09:21:07,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:07,732 INFO L93 Difference]: Finished difference Result 221 states and 228 transitions. [2018-10-03 09:21:07,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-10-03 09:21:07,732 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 212 [2018-10-03 09:21:07,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:07,733 INFO L225 Difference]: With dead ends: 221 [2018-10-03 09:21:07,733 INFO L226 Difference]: Without dead ends: 217 [2018-10-03 09:21:07,733 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8s Time 6.1s impTime 142 [2018-10-03 09:21:07,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-10-03 09:21:07,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-10-03 09:21:07,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-10-03 09:21:07,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2018-10-03 09:21:07,736 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 212 [2018-10-03 09:21:07,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:07,736 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2018-10-03 09:21:07,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-10-03 09:21:07,736 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2018-10-03 09:21:07,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-10-03 09:21:07,737 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:07,737 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 70, 1, 1, 1] [2018-10-03 09:21:07,737 INFO L423 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:21:07,737 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:07,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1501738231, now seen corresponding path program 70 times [2018-10-03 09:21:07,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:07,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:07,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:07,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:07,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:21:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 71 proven. 7455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:09,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:21:09,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:21:09,144 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:21:09,203 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:21:09,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:09,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:09,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 71 proven. 7455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:09,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:21:09,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-03 09:21:09,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-03 09:21:09,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-03 09:21:09,565 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:09,565 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand 73 states. [2018-10-03 09:21:09,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:09,797 INFO L93 Difference]: Finished difference Result 222 states and 227 transitions. [2018-10-03 09:21:09,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-03 09:21:09,798 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 215 [2018-10-03 09:21:09,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:09,799 INFO L225 Difference]: With dead ends: 222 [2018-10-03 09:21:09,799 INFO L226 Difference]: Without dead ends: 218 [2018-10-03 09:21:09,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime 71 [2018-10-03 09:21:09,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-03 09:21:09,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2018-10-03 09:21:09,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-10-03 09:21:09,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 220 transitions. [2018-10-03 09:21:09,802 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 220 transitions. Word has length 215 [2018-10-03 09:21:09,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:09,803 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 220 transitions. [2018-10-03 09:21:09,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-03 09:21:09,803 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 220 transitions. [2018-10-03 09:21:09,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-10-03 09:21:09,803 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:09,803 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 71, 1, 1] [2018-10-03 09:21:09,804 INFO L423 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:21:09,804 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:09,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1501738169, now seen corresponding path program 46 times [2018-10-03 09:21:09,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:09,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:09,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:09,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:09,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:09,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:21:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 0 proven. 7526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:10,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:21:10,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:21:10,644 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:21:10,706 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:21:10,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:10,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 0 proven. 7526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:11,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:21:11,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-03 09:21:11,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-03 09:21:11,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-03 09:21:11,083 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:11,083 INFO L87 Difference]: Start difference. First operand 218 states and 220 transitions. Second operand 74 states. [2018-10-03 09:21:11,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:11,286 INFO L93 Difference]: Finished difference Result 224 states and 230 transitions. [2018-10-03 09:21:11,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-03 09:21:11,286 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 215 [2018-10-03 09:21:11,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:11,287 INFO L225 Difference]: With dead ends: 224 [2018-10-03 09:21:11,287 INFO L226 Difference]: Without dead ends: 220 [2018-10-03 09:21:11,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 72 [2018-10-03 09:21:11,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-10-03 09:21:11,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2018-10-03 09:21:11,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-03 09:21:11,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2018-10-03 09:21:11,291 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 215 [2018-10-03 09:21:11,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:11,292 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2018-10-03 09:21:11,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-03 09:21:11,292 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2018-10-03 09:21:11,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-03 09:21:11,293 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:11,293 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 71, 1, 1, 1] [2018-10-03 09:21:11,293 INFO L423 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:21:11,293 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:11,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1902845547, now seen corresponding path program 71 times [2018-10-03 09:21:11,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:11,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:11,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:11,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:11,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:21:12,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 72 proven. 7668 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:12,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:21:12,452 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:21:12,459 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:21:12,599 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-10-03 09:21:12,599 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:12,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:12,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 72 proven. 7668 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:12,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:21:12,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-03 09:21:12,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-03 09:21:12,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-03 09:21:12,972 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:12,972 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand 74 states. [2018-10-03 09:21:13,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:13,264 INFO L93 Difference]: Finished difference Result 225 states and 230 transitions. [2018-10-03 09:21:13,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-03 09:21:13,265 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 218 [2018-10-03 09:21:13,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:13,265 INFO L225 Difference]: With dead ends: 225 [2018-10-03 09:21:13,266 INFO L226 Difference]: Without dead ends: 221 [2018-10-03 09:21:13,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.9s impTime 72 [2018-10-03 09:21:13,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-03 09:21:13,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-10-03 09:21:13,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-10-03 09:21:13,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2018-10-03 09:21:13,270 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 218 [2018-10-03 09:21:13,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:13,270 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2018-10-03 09:21:13,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-03 09:21:13,270 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2018-10-03 09:21:13,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-03 09:21:13,270 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:13,271 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 72, 1, 1] [2018-10-03 09:21:13,271 INFO L423 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:21:13,271 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:13,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1902845485, now seen corresponding path program 47 times [2018-10-03 09:21:13,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:13,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:13,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:13,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:13,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:21:14,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 0 proven. 7740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:14,166 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:21:14,166 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:21:14,173 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:21:14,362 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-10-03 09:21:14,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:14,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 0 proven. 7740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:14,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:21:14,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-03 09:21:14,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-03 09:21:14,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-03 09:21:14,735 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:14,735 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand 75 states. [2018-10-03 09:21:14,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:14,963 INFO L93 Difference]: Finished difference Result 227 states and 233 transitions. [2018-10-03 09:21:14,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-03 09:21:14,963 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 218 [2018-10-03 09:21:14,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:14,964 INFO L225 Difference]: With dead ends: 227 [2018-10-03 09:21:14,964 INFO L226 Difference]: Without dead ends: 223 [2018-10-03 09:21:14,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 73 [2018-10-03 09:21:14,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-10-03 09:21:14,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-10-03 09:21:14,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-10-03 09:21:14,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2018-10-03 09:21:14,968 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 218 [2018-10-03 09:21:14,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:14,968 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2018-10-03 09:21:14,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-03 09:21:14,968 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2018-10-03 09:21:14,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-10-03 09:21:14,969 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:14,969 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 72, 1, 1, 1] [2018-10-03 09:21:14,969 INFO L423 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:21:14,969 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:14,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1603088265, now seen corresponding path program 72 times [2018-10-03 09:21:14,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:14,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:14,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:14,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:14,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:21:16,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 73 proven. 7884 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:16,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:21:16,146 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:21:16,153 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:21:16,298 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 74 check-sat command(s) [2018-10-03 09:21:16,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:16,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 0 proven. 7957 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:18,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:21:18,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-10-03 09:21:18,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-10-03 09:21:18,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-10-03 09:21:18,878 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:18,878 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand 149 states. [2018-10-03 09:21:24,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:24,515 INFO L93 Difference]: Finished difference Result 230 states and 237 transitions. [2018-10-03 09:21:24,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-10-03 09:21:24,516 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 221 [2018-10-03 09:21:24,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:24,516 INFO L225 Difference]: With dead ends: 230 [2018-10-03 09:21:24,516 INFO L226 Difference]: Without dead ends: 226 [2018-10-03 09:21:24,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5s Time 7.8s impTime 148 [2018-10-03 09:21:24,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-10-03 09:21:24,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2018-10-03 09:21:24,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-10-03 09:21:24,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 228 transitions. [2018-10-03 09:21:24,519 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 228 transitions. Word has length 221 [2018-10-03 09:21:24,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:24,520 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 228 transitions. [2018-10-03 09:21:24,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-10-03 09:21:24,520 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 228 transitions. [2018-10-03 09:21:24,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-10-03 09:21:24,520 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:24,520 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 73, 1, 1, 1] [2018-10-03 09:21:24,521 INFO L423 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:21:24,521 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:24,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1862577429, now seen corresponding path program 73 times [2018-10-03 09:21:24,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:24,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:24,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:24,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:24,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:21:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 74 proven. 8103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:25,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:21:25,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:21:25,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:21:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:21:25,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:26,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 74 proven. 8103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:26,066 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:21:26,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-03 09:21:26,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-03 09:21:26,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-03 09:21:26,067 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:26,067 INFO L87 Difference]: Start difference. First operand 226 states and 228 transitions. Second operand 76 states. [2018-10-03 09:21:26,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:26,307 INFO L93 Difference]: Finished difference Result 231 states and 236 transitions. [2018-10-03 09:21:26,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-03 09:21:26,308 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 224 [2018-10-03 09:21:26,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:26,308 INFO L225 Difference]: With dead ends: 231 [2018-10-03 09:21:26,308 INFO L226 Difference]: Without dead ends: 227 [2018-10-03 09:21:26,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 74 [2018-10-03 09:21:26,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-10-03 09:21:26,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-10-03 09:21:26,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-10-03 09:21:26,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 229 transitions. [2018-10-03 09:21:26,312 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 229 transitions. Word has length 224 [2018-10-03 09:21:26,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:26,312 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 229 transitions. [2018-10-03 09:21:26,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-03 09:21:26,312 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 229 transitions. [2018-10-03 09:21:26,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-10-03 09:21:26,312 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:26,313 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 74, 1, 1] [2018-10-03 09:21:26,313 INFO L423 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:21:26,313 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:26,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1862577491, now seen corresponding path program 48 times [2018-10-03 09:21:26,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:26,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:26,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:26,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:21:26,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:21:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 0 proven. 8177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:27,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:21:27,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:21:27,210 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:21:27,356 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 75 check-sat command(s) [2018-10-03 09:21:27,357 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:27,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 0 proven. 8177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:27,738 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:21:27,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-03 09:21:27,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-03 09:21:27,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-03 09:21:27,740 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:27,740 INFO L87 Difference]: Start difference. First operand 227 states and 229 transitions. Second operand 77 states. [2018-10-03 09:21:27,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:27,961 INFO L93 Difference]: Finished difference Result 233 states and 239 transitions. [2018-10-03 09:21:27,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-03 09:21:27,962 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 224 [2018-10-03 09:21:27,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:27,963 INFO L225 Difference]: With dead ends: 233 [2018-10-03 09:21:27,963 INFO L226 Difference]: Without dead ends: 229 [2018-10-03 09:21:27,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 75 [2018-10-03 09:21:27,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-10-03 09:21:27,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-10-03 09:21:27,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-10-03 09:21:27,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 231 transitions. [2018-10-03 09:21:27,967 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 231 transitions. Word has length 224 [2018-10-03 09:21:27,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:27,967 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 231 transitions. [2018-10-03 09:21:27,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-03 09:21:27,967 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 231 transitions. [2018-10-03 09:21:27,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-10-03 09:21:27,968 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:27,968 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 74, 1, 1, 1] [2018-10-03 09:21:27,968 INFO L423 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:21:27,969 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:27,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1363129353, now seen corresponding path program 74 times [2018-10-03 09:21:27,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:27,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:27,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:27,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:27,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:27,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:21:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 75 proven. 8325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:29,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:21:29,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:21:29,099 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:21:29,165 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:21:29,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:29,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 75 proven. 8325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:29,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:21:29,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-03 09:21:29,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-03 09:21:29,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-03 09:21:29,565 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:29,565 INFO L87 Difference]: Start difference. First operand 229 states and 231 transitions. Second operand 77 states. [2018-10-03 09:21:29,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:29,782 INFO L93 Difference]: Finished difference Result 234 states and 239 transitions. [2018-10-03 09:21:29,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-03 09:21:29,783 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 227 [2018-10-03 09:21:29,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:29,784 INFO L225 Difference]: With dead ends: 234 [2018-10-03 09:21:29,784 INFO L226 Difference]: Without dead ends: 230 [2018-10-03 09:21:29,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime 75 [2018-10-03 09:21:29,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-10-03 09:21:29,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2018-10-03 09:21:29,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-10-03 09:21:29,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 232 transitions. [2018-10-03 09:21:29,787 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 232 transitions. Word has length 227 [2018-10-03 09:21:29,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:29,787 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 232 transitions. [2018-10-03 09:21:29,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-03 09:21:29,787 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 232 transitions. [2018-10-03 09:21:29,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-10-03 09:21:29,788 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:29,788 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 75, 1, 1] [2018-10-03 09:21:29,788 INFO L423 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:21:29,788 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:29,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1363129415, now seen corresponding path program 49 times [2018-10-03 09:21:29,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:29,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:29,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:29,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:29,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-03 09:21:30,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 0 proven. 8400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:30,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:21:30,732 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:21:30,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:21:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:21:30,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:30,813 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-03 09:21:31,014 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:21:31,014 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-03 09:21:31,020 WARN L205 ceAbstractionStarter]: Timeout [2018-10-03 09:21:31,021 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 09:21:31 BoogieIcfgContainer [2018-10-03 09:21:31,021 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-03 09:21:31,022 INFO L168 Benchmark]: Toolchain (without parser) took 234684.80 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -27.8 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 67.8 MB). Peak memory consumption was 40.0 MB. Max. memory is 7.1 GB. [2018-10-03 09:21:31,024 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 09:21:31,024 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.12 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 09:21:31,024 INFO L168 Benchmark]: Boogie Preprocessor took 25.39 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 09:21:31,025 INFO L168 Benchmark]: RCFGBuilder took 357.54 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-03 09:21:31,032 INFO L168 Benchmark]: TraceAbstraction took 234249.92 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -27.8 MB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 46.7 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. [2018-10-03 09:21:31,034 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.12 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 25.39 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 357.54 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 234249.92 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -27.8 MB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 46.7 MB). Peak memory consumption was 18.9 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 228 with TraceHistMax 75, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 234.1s OverallTime, 125 OverallIterations, 75 TraceHistogramMax, 81.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 719 SDtfs, 2852 SDslu, 12514 SDs, 0 SdLazy, 13832 SolverSat, 1304 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20825 GetRequests, 13207 SyntacticMatches, 0 SemanticMatches, 7618 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 189.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=230occurred in iteration=124, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 124 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 8.1s SatisfiabilityAnalysisTime, 135.8s InterpolantComputationTime, 28485 NumberOfCodeBlocks, 28485 NumberOfCodeBlocksAsserted, 2629 NumberOfCheckSat, 28239 ConstructedInterpolants, 0 QuantifiedInterpolants, 12808815 SizeOfPredicates, 0 NumberOfNonLiveVariables, 33753 ConjunctsInSsa, 4861 ConjunctsInUnsatCore, 246 InterpolantComputations, 2 PerfectInterpolantSequences, 4740/699157 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_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-03_09-21-31-044.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEqualityWithBranches.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-03_09-21-31-044.csv Completed graceful shutdown