java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 11:53:46,189 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 11:53:46,191 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 11:53:46,209 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 11:53:46,209 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 11:53:46,211 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 11:53:46,212 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 11:53:46,214 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 11:53:46,216 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 11:53:46,217 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 11:53:46,219 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-02 11:53:46,258 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-02 11:53:46,279 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 11:53:46,279 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 11:53:46,281 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 11:53:46,281 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 11:53:46,282 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 11:53:46,282 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 11:53:46,282 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 11:53:46,284 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 11:53:46,285 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 11:53:46,285 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 11:53:46,285 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 11:53:46,285 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 11:53:46,285 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 11:53:46,285 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 11:53:46,286 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 11:53:46,286 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 11:53:46,286 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 11:53:46,286 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 11:53:46,286 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 11:53:46,287 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 11:53:46,287 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 11:53:46,287 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 11:53:46,287 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:53:46,287 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 11:53:46,287 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 11:53:46,288 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 11:53:46,288 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 11:53:46,288 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 11:53:46,288 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 11:53:46,288 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 11:53:46,341 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 11:53:46,355 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 11:53:46,358 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 11:53:46,360 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 11:53:46,360 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 11:53:46,361 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl [2018-10-02 11:53:46,361 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl' [2018-10-02 11:53:46,417 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 11:53:46,421 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 11:53:46,421 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 11:53:46,422 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 11:53:46,422 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 11:53:46,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:53:46" (1/1) ... [2018-10-02 11:53:46,455 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:53:46" (1/1) ... [2018-10-02 11:53:46,459 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-02 11:53:46,460 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-02 11:53:46,460 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-02 11:53:46,462 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 11:53:46,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 11:53:46,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 11:53:46,463 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 11:53:46,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:53:46" (1/1) ... [2018-10-02 11:53:46,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:53:46" (1/1) ... [2018-10-02 11:53:46,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:53:46" (1/1) ... [2018-10-02 11:53:46,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:53:46" (1/1) ... [2018-10-02 11:53:46,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:53:46" (1/1) ... [2018-10-02 11:53:46,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:53:46" (1/1) ... [2018-10-02 11:53:46,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:53:46" (1/1) ... [2018-10-02 11:53:46,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 11:53:46,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 11:53:46,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 11:53:46,488 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 11:53:46,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:53:46" (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 [2018-10-02 11:53:46,552 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-02 11:53:46,552 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-02 11:53:46,552 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-02 11:53:46,783 INFO L337 CfgBuilder]: Using library mode [2018-10-02 11:53:46,783 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:53:46 BoogieIcfgContainer [2018-10-02 11:53:46,784 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 11:53:46,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 11:53:46,785 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 11:53:46,788 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 11:53:46,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:53:46" (1/2) ... [2018-10-02 11:53:46,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bce42d1 and model type Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:53:46, skipping insertion in model container [2018-10-02 11:53:46,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:53:46" (2/2) ... [2018-10-02 11:53:46,791 INFO L112 eAbstractionObserver]: Analyzing ICFG Luxembourg-sophisticated.bpl [2018-10-02 11:53:46,802 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 11:53:46,810 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 11:53:46,862 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 11:53:46,863 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 11:53:46,863 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 11:53:46,864 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 11:53:46,864 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 11:53:46,864 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 11:53:46,864 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 11:53:46,865 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 11:53:46,865 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 11:53:46,880 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-02 11:53:46,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-02 11:53:46,893 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:46,895 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-02 11:53:46,897 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:46,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:46,908 INFO L82 PathProgramCache]: Analyzing trace with hash 30240, now seen corresponding path program 1 times [2018-10-02 11:53:46,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:46,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:46,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:46,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:46,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:47,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:47,094 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:53:47,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-02 11:53:47,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 11:53:47,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 11:53:47,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:53:47,114 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-02 11:53:47,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:47,199 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2018-10-02 11:53:47,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 11:53:47,201 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-02 11:53:47,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:47,222 INFO L225 Difference]: With dead ends: 15 [2018-10-02 11:53:47,222 INFO L226 Difference]: Without dead ends: 7 [2018-10-02 11:53:47,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:53:47,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-02 11:53:47,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-10-02 11:53:47,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-02 11:53:47,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-10-02 11:53:47,322 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-10-02 11:53:47,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:47,326 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-10-02 11:53:47,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 11:53:47,326 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-10-02 11:53:47,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-02 11:53:47,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:47,326 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-02 11:53:47,327 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:47,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:47,330 INFO L82 PathProgramCache]: Analyzing trace with hash 28755491, now seen corresponding path program 1 times [2018-10-02 11:53:47,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:47,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:47,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:47,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:47,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:47,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:47,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:47,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:53:47,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:47,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:47,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:47,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:47,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-02 11:53:47,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 11:53:47,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 11:53:47,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:53:47,462 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 4 states. [2018-10-02 11:53:47,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:47,499 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-10-02 11:53:47,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 11:53:47,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-10-02 11:53:47,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:47,500 INFO L225 Difference]: With dead ends: 11 [2018-10-02 11:53:47,500 INFO L226 Difference]: Without dead ends: 9 [2018-10-02 11:53:47,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:53:47,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-02 11:53:47,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2018-10-02 11:53:47,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-02 11:53:47,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-10-02 11:53:47,504 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-10-02 11:53:47,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:47,504 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-10-02 11:53:47,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 11:53:47,504 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-10-02 11:53:47,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-02 11:53:47,505 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:47,505 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-02 11:53:47,505 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:47,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:47,506 INFO L82 PathProgramCache]: Analyzing trace with hash 28757413, now seen corresponding path program 1 times [2018-10-02 11:53:47,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:47,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:47,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:47,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:47,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:47,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:47,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:47,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:53:47,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:47,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:47,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:47,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:47,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-02 11:53:47,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 11:53:47,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 11:53:47,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:53:47,602 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 4 states. [2018-10-02 11:53:47,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:47,640 INFO L93 Difference]: Finished difference Result 12 states and 15 transitions. [2018-10-02 11:53:47,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 11:53:47,641 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-10-02 11:53:47,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:47,641 INFO L225 Difference]: With dead ends: 12 [2018-10-02 11:53:47,641 INFO L226 Difference]: Without dead ends: 10 [2018-10-02 11:53:47,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:53:47,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-02 11:53:47,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2018-10-02 11:53:47,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-02 11:53:47,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-10-02 11:53:47,645 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-10-02 11:53:47,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:47,646 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-10-02 11:53:47,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 11:53:47,647 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-10-02 11:53:47,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-02 11:53:47,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:47,648 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-10-02 11:53:47,648 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:47,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:47,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1863917926, now seen corresponding path program 2 times [2018-10-02 11:53:47,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:47,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:47,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:47,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:47,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:47,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:47,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:47,714 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 [2018-10-02 11:53:47,722 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:47,731 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:47,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:47,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:47,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:47,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-02 11:53:47,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 11:53:47,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 11:53:47,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:53:47,760 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 5 states. [2018-10-02 11:53:47,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:47,801 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-10-02 11:53:47,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 11:53:47,801 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-10-02 11:53:47,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:47,802 INFO L225 Difference]: With dead ends: 14 [2018-10-02 11:53:47,802 INFO L226 Difference]: Without dead ends: 12 [2018-10-02 11:53:47,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:53:47,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-02 11:53:47,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-10-02 11:53:47,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-02 11:53:47,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-10-02 11:53:47,807 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-10-02 11:53:47,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:47,807 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-10-02 11:53:47,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 11:53:47,807 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-10-02 11:53:47,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-02 11:53:47,808 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:47,808 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-10-02 11:53:47,808 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:47,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:47,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1863919848, now seen corresponding path program 1 times [2018-10-02 11:53:47,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:47,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:47,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:47,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:47,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:47,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:47,901 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 [2018-10-02 11:53:47,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:47,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:47,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:47,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:47,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-02 11:53:47,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 11:53:47,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 11:53:47,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:53:47,967 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-10-02 11:53:48,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:48,117 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-10-02 11:53:48,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 11:53:48,119 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-10-02 11:53:48,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:48,120 INFO L225 Difference]: With dead ends: 14 [2018-10-02 11:53:48,120 INFO L226 Difference]: Without dead ends: 12 [2018-10-02 11:53:48,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:53:48,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-02 11:53:48,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-10-02 11:53:48,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-02 11:53:48,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-10-02 11:53:48,128 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-10-02 11:53:48,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:48,129 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-10-02 11:53:48,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 11:53:48,129 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-10-02 11:53:48,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-02 11:53:48,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:48,130 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-10-02 11:53:48,131 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:48,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:48,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1865764968, now seen corresponding path program 2 times [2018-10-02 11:53:48,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:48,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:48,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:48,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:48,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:48,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:48,300 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 [2018-10-02 11:53:48,315 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:48,344 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:48,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:48,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:48,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:48,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-02 11:53:48,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 11:53:48,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 11:53:48,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:53:48,376 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-10-02 11:53:48,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:48,476 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2018-10-02 11:53:48,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 11:53:48,478 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-10-02 11:53:48,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:48,479 INFO L225 Difference]: With dead ends: 17 [2018-10-02 11:53:48,481 INFO L226 Difference]: Without dead ends: 15 [2018-10-02 11:53:48,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:53:48,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-02 11:53:48,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2018-10-02 11:53:48,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-02 11:53:48,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-10-02 11:53:48,487 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 7 [2018-10-02 11:53:48,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:48,487 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-10-02 11:53:48,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 11:53:48,487 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-10-02 11:53:48,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-02 11:53:48,488 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:48,488 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-10-02 11:53:48,489 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:48,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:48,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1865766890, now seen corresponding path program 2 times [2018-10-02 11:53:48,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:48,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:48,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:48,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:48,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:48,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:48,544 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 [2018-10-02 11:53:48,552 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:48,561 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:48,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:48,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:48,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:48,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-02 11:53:48,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 11:53:48,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 11:53:48,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:53:48,592 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 5 states. [2018-10-02 11:53:48,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:48,635 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2018-10-02 11:53:48,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 11:53:48,636 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-10-02 11:53:48,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:48,637 INFO L225 Difference]: With dead ends: 16 [2018-10-02 11:53:48,637 INFO L226 Difference]: Without dead ends: 14 [2018-10-02 11:53:48,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:53:48,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-02 11:53:48,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2018-10-02 11:53:48,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-02 11:53:48,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-10-02 11:53:48,641 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-10-02 11:53:48,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:48,641 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-10-02 11:53:48,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 11:53:48,642 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-10-02 11:53:48,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 11:53:48,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:48,642 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-10-02 11:53:48,642 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:48,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:48,643 INFO L82 PathProgramCache]: Analyzing trace with hash 223459305, now seen corresponding path program 3 times [2018-10-02 11:53:48,643 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:48,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:48,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:48,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:48,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:48,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:48,783 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 [2018-10-02 11:53:48,793 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:48,801 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-02 11:53:48,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:48,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:48,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:48,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:48,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-02 11:53:48,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:53:48,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:53:48,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:53:48,830 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 6 states. [2018-10-02 11:53:48,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:48,942 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-10-02 11:53:48,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:53:48,943 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-02 11:53:48,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:48,943 INFO L225 Difference]: With dead ends: 19 [2018-10-02 11:53:48,944 INFO L226 Difference]: Without dead ends: 17 [2018-10-02 11:53:48,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:53:48,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-02 11:53:48,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-10-02 11:53:48,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-02 11:53:48,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-10-02 11:53:48,949 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-10-02 11:53:48,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:48,950 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-10-02 11:53:48,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:53:48,950 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-10-02 11:53:48,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 11:53:48,951 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:48,951 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-10-02 11:53:48,951 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:48,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:48,952 INFO L82 PathProgramCache]: Analyzing trace with hash 223461227, now seen corresponding path program 3 times [2018-10-02 11:53:48,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:48,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:48,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:48,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:48,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:49,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:49,000 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 [2018-10-02 11:53:49,015 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:49,030 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-02 11:53:49,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:49,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:49,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:49,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:49,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-02 11:53:49,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:53:49,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:53:49,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:53:49,063 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-10-02 11:53:49,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:49,123 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-10-02 11:53:49,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:53:49,123 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-02 11:53:49,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:49,124 INFO L225 Difference]: With dead ends: 18 [2018-10-02 11:53:49,124 INFO L226 Difference]: Without dead ends: 16 [2018-10-02 11:53:49,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:53:49,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-02 11:53:49,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-10-02 11:53:49,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-02 11:53:49,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-10-02 11:53:49,129 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-10-02 11:53:49,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:49,129 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-10-02 11:53:49,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:53:49,129 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-10-02 11:53:49,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 11:53:49,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:49,130 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-10-02 11:53:49,130 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:49,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:49,131 INFO L82 PathProgramCache]: Analyzing trace with hash 225306347, now seen corresponding path program 4 times [2018-10-02 11:53:49,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:49,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:49,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:49,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:49,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:49,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:49,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:49,177 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 [2018-10-02 11:53:49,187 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:49,192 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:49,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:49,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:49,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:49,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:49,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-02 11:53:49,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:53:49,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:53:49,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:53:49,219 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-10-02 11:53:49,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:49,255 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-10-02 11:53:49,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:53:49,255 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-02 11:53:49,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:49,256 INFO L225 Difference]: With dead ends: 19 [2018-10-02 11:53:49,256 INFO L226 Difference]: Without dead ends: 17 [2018-10-02 11:53:49,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:53:49,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-02 11:53:49,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-10-02 11:53:49,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-02 11:53:49,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-10-02 11:53:49,263 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-10-02 11:53:49,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:49,263 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-10-02 11:53:49,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:53:49,263 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-10-02 11:53:49,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 11:53:49,264 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:49,264 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-10-02 11:53:49,264 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:49,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:49,265 INFO L82 PathProgramCache]: Analyzing trace with hash 225308269, now seen corresponding path program 5 times [2018-10-02 11:53:49,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:49,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:49,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:49,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:49,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:49,367 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:49,367 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 [2018-10-02 11:53:49,380 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:49,442 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-02 11:53:49,443 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:49,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:49,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:49,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:49,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-02 11:53:49,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:53:49,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:53:49,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:53:49,488 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-10-02 11:53:49,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:49,654 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-10-02 11:53:49,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:53:49,655 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-02 11:53:49,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:49,655 INFO L225 Difference]: With dead ends: 18 [2018-10-02 11:53:49,655 INFO L226 Difference]: Without dead ends: 16 [2018-10-02 11:53:49,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:53:49,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-02 11:53:49,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-10-02 11:53:49,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-02 11:53:49,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-10-02 11:53:49,659 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-10-02 11:53:49,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:49,660 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-10-02 11:53:49,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:53:49,660 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-10-02 11:53:49,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 11:53:49,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:49,661 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-10-02 11:53:49,661 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:49,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:49,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1998466667, now seen corresponding path program 6 times [2018-10-02 11:53:49,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:49,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:49,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:49,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:49,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:49,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:49,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:49,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:53:49,715 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:49,720 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-02 11:53:49,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:49,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:49,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:49,750 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:49,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-02 11:53:49,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:53:49,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:53:49,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:53:49,751 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-10-02 11:53:49,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:49,779 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-10-02 11:53:49,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:53:49,780 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-02 11:53:49,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:49,781 INFO L225 Difference]: With dead ends: 23 [2018-10-02 11:53:49,781 INFO L226 Difference]: Without dead ends: 21 [2018-10-02 11:53:49,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:53:49,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-02 11:53:49,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2018-10-02 11:53:49,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-02 11:53:49,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-02 11:53:49,787 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-10-02 11:53:49,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:49,787 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-02 11:53:49,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:53:49,788 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-02 11:53:49,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 11:53:49,788 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:49,788 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-10-02 11:53:49,789 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:49,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:49,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1998468589, now seen corresponding path program 7 times [2018-10-02 11:53:49,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:49,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:49,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:49,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:49,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:49,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:49,855 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 [2018-10-02 11:53:49,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:49,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:49,895 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:49,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-02 11:53:49,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:53:49,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:53:49,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:53:49,897 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-10-02 11:53:49,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:49,940 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-10-02 11:53:49,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:53:49,940 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-02 11:53:49,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:49,941 INFO L225 Difference]: With dead ends: 23 [2018-10-02 11:53:49,941 INFO L226 Difference]: Without dead ends: 21 [2018-10-02 11:53:49,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:53:49,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-02 11:53:49,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2018-10-02 11:53:49,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-02 11:53:49,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-10-02 11:53:49,947 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-10-02 11:53:49,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:49,948 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-10-02 11:53:49,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:53:49,948 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-10-02 11:53:49,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 11:53:49,948 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:49,948 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-10-02 11:53:49,949 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:49,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:49,949 INFO L82 PathProgramCache]: Analyzing trace with hash 2000313709, now seen corresponding path program 8 times [2018-10-02 11:53:49,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:49,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:49,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:49,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:49,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:50,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:50,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:50,003 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 [2018-10-02 11:53:50,014 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:50,020 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:50,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:50,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:50,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:50,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-02 11:53:50,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:53:50,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:53:50,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:53:50,049 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-10-02 11:53:50,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:50,100 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2018-10-02 11:53:50,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:53:50,103 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-02 11:53:50,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:50,104 INFO L225 Difference]: With dead ends: 21 [2018-10-02 11:53:50,104 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 11:53:50,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:53:50,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 11:53:50,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2018-10-02 11:53:50,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-02 11:53:50,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-02 11:53:50,110 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-10-02 11:53:50,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:50,110 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-02 11:53:50,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:53:50,111 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-02 11:53:50,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 11:53:50,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:50,111 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-10-02 11:53:50,112 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:50,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:50,112 INFO L82 PathProgramCache]: Analyzing trace with hash 2000315631, now seen corresponding path program 3 times [2018-10-02 11:53:50,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:50,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:50,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:50,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:50,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:50,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:50,341 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 [2018-10-02 11:53:50,351 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:50,359 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-02 11:53:50,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:50,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:50,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:50,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-02 11:53:50,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:53:50,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:53:50,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:53:50,386 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-10-02 11:53:50,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:50,440 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2018-10-02 11:53:50,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:53:50,441 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-02 11:53:50,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:50,442 INFO L225 Difference]: With dead ends: 20 [2018-10-02 11:53:50,442 INFO L226 Difference]: Without dead ends: 18 [2018-10-02 11:53:50,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:53:50,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-02 11:53:50,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2018-10-02 11:53:50,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-02 11:53:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-10-02 11:53:50,447 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-10-02 11:53:50,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:50,448 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-10-02 11:53:50,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:53:50,448 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-10-02 11:53:50,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 11:53:50,448 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:50,448 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-10-02 11:53:50,449 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:50,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:50,449 INFO L82 PathProgramCache]: Analyzing trace with hash -4277844, now seen corresponding path program 4 times [2018-10-02 11:53:50,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:50,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:50,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:50,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:50,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:50,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:50,593 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:50,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:53:50,601 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:50,616 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:50,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:50,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:50,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:50,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:53:50,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:53:50,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:53:50,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:50,652 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 7 states. [2018-10-02 11:53:50,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:50,737 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-10-02 11:53:50,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:53:50,739 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-02 11:53:50,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:50,739 INFO L225 Difference]: With dead ends: 25 [2018-10-02 11:53:50,739 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 11:53:50,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:50,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 11:53:50,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-10-02 11:53:50,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-02 11:53:50,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-02 11:53:50,748 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-10-02 11:53:50,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:50,748 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-02 11:53:50,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:53:50,748 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-02 11:53:50,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 11:53:50,749 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:50,749 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-02 11:53:50,749 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:50,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:50,750 INFO L82 PathProgramCache]: Analyzing trace with hash -4275922, now seen corresponding path program 9 times [2018-10-02 11:53:50,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:50,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:50,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:50,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:50,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:50,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:50,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:53:50,846 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:50,852 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-02 11:53:50,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:50,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:50,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:50,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:50,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:53:50,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:53:50,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:53:50,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:50,882 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-10-02 11:53:50,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:50,923 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-10-02 11:53:50,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:53:50,924 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-02 11:53:50,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:50,925 INFO L225 Difference]: With dead ends: 25 [2018-10-02 11:53:50,925 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 11:53:50,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:50,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 11:53:50,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-10-02 11:53:50,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-02 11:53:50,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-02 11:53:50,933 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-10-02 11:53:50,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:50,933 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-02 11:53:50,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:53:50,934 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-02 11:53:50,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 11:53:50,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:50,934 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-02 11:53:50,934 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:50,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:50,935 INFO L82 PathProgramCache]: Analyzing trace with hash -2430802, now seen corresponding path program 10 times [2018-10-02 11:53:50,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:50,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:50,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:50,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:50,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:50,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:50,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:50,993 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:53:51,002 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:51,020 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:51,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:51,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:51,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:51,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:53:51,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:53:51,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:53:51,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:51,047 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-10-02 11:53:51,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:51,124 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-10-02 11:53:51,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:53:51,124 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-02 11:53:51,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:51,125 INFO L225 Difference]: With dead ends: 23 [2018-10-02 11:53:51,125 INFO L226 Difference]: Without dead ends: 21 [2018-10-02 11:53:51,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:51,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-02 11:53:51,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-10-02 11:53:51,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-02 11:53:51,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-02 11:53:51,134 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-10-02 11:53:51,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:51,135 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-02 11:53:51,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:53:51,135 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-02 11:53:51,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 11:53:51,136 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:51,136 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-10-02 11:53:51,137 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:51,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:51,137 INFO L82 PathProgramCache]: Analyzing trace with hash -2428880, now seen corresponding path program 11 times [2018-10-02 11:53:51,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:51,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:51,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:51,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:51,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:51,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:51,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:51,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:53:51,326 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:51,337 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-02 11:53:51,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:51,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:51,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:51,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:51,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:53:51,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:53:51,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:53:51,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:51,370 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-10-02 11:53:51,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:51,479 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-10-02 11:53:51,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:53:51,479 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-02 11:53:51,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:51,480 INFO L225 Difference]: With dead ends: 22 [2018-10-02 11:53:51,480 INFO L226 Difference]: Without dead ends: 20 [2018-10-02 11:53:51,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:51,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-02 11:53:51,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-10-02 11:53:51,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-02 11:53:51,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-10-02 11:53:51,490 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-10-02 11:53:51,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:51,490 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-10-02 11:53:51,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:53:51,490 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-10-02 11:53:51,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 11:53:51,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:51,491 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-02 11:53:51,492 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:51,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:51,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1770729518, now seen corresponding path program 12 times [2018-10-02 11:53:51,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:51,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:51,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:51,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:51,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:51,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:51,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:51,724 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 [2018-10-02 11:53:51,732 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:51,737 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-02 11:53:51,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:51,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:51,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:51,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:53:51,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:53:51,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:53:51,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:51,770 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-10-02 11:53:51,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:51,867 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-10-02 11:53:51,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:53:51,870 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-02 11:53:51,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:51,870 INFO L225 Difference]: With dead ends: 25 [2018-10-02 11:53:51,870 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 11:53:51,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:51,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 11:53:51,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-10-02 11:53:51,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-02 11:53:51,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-02 11:53:51,878 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-10-02 11:53:51,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:51,878 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-02 11:53:51,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:53:51,879 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-02 11:53:51,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 11:53:51,879 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:51,879 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-10-02 11:53:51,880 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:51,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:51,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1770731440, now seen corresponding path program 13 times [2018-10-02 11:53:51,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:51,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:51,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:51,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:51,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:51,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:51,924 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:53:51,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:51,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:51,963 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:51,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:53:51,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:53:51,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:53:51,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:51,964 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-10-02 11:53:52,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:52,170 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-10-02 11:53:52,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:53:52,171 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-02 11:53:52,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:52,171 INFO L225 Difference]: With dead ends: 25 [2018-10-02 11:53:52,172 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 11:53:52,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:52,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 11:53:52,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-10-02 11:53:52,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-02 11:53:52,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-02 11:53:52,182 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-10-02 11:53:52,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:52,182 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-02 11:53:52,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:53:52,182 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-02 11:53:52,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 11:53:52,183 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:52,183 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-10-02 11:53:52,185 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:52,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:52,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1772576560, now seen corresponding path program 14 times [2018-10-02 11:53:52,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:52,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:52,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:52,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:52,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:52,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:52,402 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 [2018-10-02 11:53:52,428 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:52,443 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:52,443 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:52,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:52,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:52,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:53:52,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:53:52,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:53:52,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:52,473 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-10-02 11:53:52,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:52,525 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-10-02 11:53:52,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:53:52,526 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-02 11:53:52,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:52,526 INFO L225 Difference]: With dead ends: 23 [2018-10-02 11:53:52,526 INFO L226 Difference]: Without dead ends: 21 [2018-10-02 11:53:52,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:52,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-02 11:53:52,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-10-02 11:53:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-02 11:53:52,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-02 11:53:52,535 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-10-02 11:53:52,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:52,535 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-02 11:53:52,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:53:52,535 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-02 11:53:52,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 11:53:52,536 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:52,536 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-02 11:53:52,536 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:52,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:52,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578482, now seen corresponding path program 15 times [2018-10-02 11:53:52,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:52,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:52,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:52,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:52,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:52,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:52,595 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 [2018-10-02 11:53:52,603 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:52,609 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-02 11:53:52,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:52,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:52,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:52,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:53:52,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:53:52,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:53:52,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:52,635 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-10-02 11:53:52,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:52,804 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-10-02 11:53:52,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:53:52,804 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-02 11:53:52,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:52,805 INFO L225 Difference]: With dead ends: 22 [2018-10-02 11:53:52,805 INFO L226 Difference]: Without dead ends: 20 [2018-10-02 11:53:52,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:52,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-02 11:53:52,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-10-02 11:53:52,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-02 11:53:52,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-10-02 11:53:52,812 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-10-02 11:53:52,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:52,813 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-10-02 11:53:52,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:53:52,813 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-10-02 11:53:52,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 11:53:52,813 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:52,813 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-02 11:53:52,814 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:52,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:52,814 INFO L82 PathProgramCache]: Analyzing trace with hash 675780526, now seen corresponding path program 16 times [2018-10-02 11:53:52,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:52,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:52,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:52,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:52,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:53,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:53,284 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 [2018-10-02 11:53:53,295 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:53,329 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:53,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:53,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:53,364 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:53,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:53:53,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:53:53,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:53:53,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:53,365 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-10-02 11:53:53,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:53,425 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-02 11:53:53,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:53:53,425 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-02 11:53:53,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:53,425 INFO L225 Difference]: With dead ends: 31 [2018-10-02 11:53:53,425 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 11:53:53,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:53,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 11:53:53,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-10-02 11:53:53,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 11:53:53,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-02 11:53:53,434 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-10-02 11:53:53,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:53,434 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-02 11:53:53,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:53:53,435 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-02 11:53:53,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 11:53:53,435 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:53,435 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-10-02 11:53:53,435 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:53,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:53,436 INFO L82 PathProgramCache]: Analyzing trace with hash 675782448, now seen corresponding path program 17 times [2018-10-02 11:53:53,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:53,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:53,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:53,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:53,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:53,534 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:53,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:53,534 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 [2018-10-02 11:53:53,544 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:53,558 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-02 11:53:53,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:53,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:53,585 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:53,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:53:53,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:53:53,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:53:53,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:53,586 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-10-02 11:53:53,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:53,673 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-02 11:53:53,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:53:53,674 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-02 11:53:53,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:53,675 INFO L225 Difference]: With dead ends: 29 [2018-10-02 11:53:53,675 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 11:53:53,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:53,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 11:53:53,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2018-10-02 11:53:53,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-02 11:53:53,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-02 11:53:53,684 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-10-02 11:53:53,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:53,685 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-02 11:53:53,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:53:53,685 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-02 11:53:53,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 11:53:53,685 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:53,686 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-10-02 11:53:53,686 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:53,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:53,686 INFO L82 PathProgramCache]: Analyzing trace with hash 677627568, now seen corresponding path program 18 times [2018-10-02 11:53:53,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:53,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:53,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:53,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:53,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:53,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:53,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:53,769 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 [2018-10-02 11:53:53,777 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:53,789 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-02 11:53:53,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:53,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:53,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:53,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:53,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:53:53,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:53:53,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:53:53,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:53,822 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-10-02 11:53:53,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:53,864 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-02 11:53:53,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:53:53,864 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-02 11:53:53,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:53,865 INFO L225 Difference]: With dead ends: 31 [2018-10-02 11:53:53,865 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 11:53:53,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:53,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 11:53:53,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-10-02 11:53:53,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 11:53:53,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-02 11:53:53,877 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-10-02 11:53:53,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:53,877 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-02 11:53:53,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:53:53,878 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-02 11:53:53,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 11:53:53,878 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:53,878 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-02 11:53:53,878 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:53,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:53,879 INFO L82 PathProgramCache]: Analyzing trace with hash 677629490, now seen corresponding path program 19 times [2018-10-02 11:53:53,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:53,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:53,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:53,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:53,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:53,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:53,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:53,942 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 [2018-10-02 11:53:53,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:53,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:53,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:53,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:53,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:53:53,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:53:53,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:53:53,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:53,979 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-10-02 11:53:54,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:54,074 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-02 11:53:54,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:53:54,074 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-02 11:53:54,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:54,075 INFO L225 Difference]: With dead ends: 29 [2018-10-02 11:53:54,075 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 11:53:54,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:54,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 11:53:54,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2018-10-02 11:53:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-02 11:53:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-02 11:53:54,081 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-10-02 11:53:54,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:54,081 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-02 11:53:54,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:53:54,081 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-02 11:53:54,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 11:53:54,081 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:54,082 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-10-02 11:53:54,082 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:54,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:54,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1844179408, now seen corresponding path program 20 times [2018-10-02 11:53:54,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:54,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:54,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:54,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:54,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:54,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:54,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:54,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:53:54,193 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:54,198 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:54,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:54,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:54,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:54,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:53:54,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:53:54,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:53:54,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:54,228 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-10-02 11:53:54,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:54,266 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-10-02 11:53:54,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:53:54,266 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-02 11:53:54,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:54,267 INFO L225 Difference]: With dead ends: 27 [2018-10-02 11:53:54,267 INFO L226 Difference]: Without dead ends: 25 [2018-10-02 11:53:54,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:54,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-02 11:53:54,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2018-10-02 11:53:54,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 11:53:54,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-02 11:53:54,276 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-10-02 11:53:54,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:54,276 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-02 11:53:54,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:53:54,277 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-02 11:53:54,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 11:53:54,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:54,277 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-02 11:53:54,278 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:54,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:54,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1844177486, now seen corresponding path program 21 times [2018-10-02 11:53:54,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:54,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:54,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:54,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:54,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:54,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:54,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:54,327 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:53:54,335 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:54,342 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-02 11:53:54,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:54,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:54,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:54,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:53:54,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:53:54,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:53:54,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:54,376 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-10-02 11:53:54,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:54,489 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-10-02 11:53:54,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:53:54,490 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-02 11:53:54,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:54,490 INFO L225 Difference]: With dead ends: 27 [2018-10-02 11:53:54,490 INFO L226 Difference]: Without dead ends: 25 [2018-10-02 11:53:54,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:54,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-02 11:53:54,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2018-10-02 11:53:54,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-02 11:53:54,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-02 11:53:54,500 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-10-02 11:53:54,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:54,500 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-02 11:53:54,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:53:54,500 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-02 11:53:54,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 11:53:54,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:54,501 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-02 11:53:54,501 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:54,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:54,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1842332366, now seen corresponding path program 22 times [2018-10-02 11:53:54,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:54,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:54,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:54,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:54,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:54,546 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:54,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:54,546 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 [2018-10-02 11:53:54,554 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:54,560 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:54,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:54,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:54,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:54,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:54,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:53:54,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:53:54,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:53:54,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:54,596 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-10-02 11:53:54,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:54,646 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-10-02 11:53:54,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:53:54,646 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-02 11:53:54,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:54,646 INFO L225 Difference]: With dead ends: 25 [2018-10-02 11:53:54,646 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 11:53:54,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:54,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 11:53:54,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2018-10-02 11:53:54,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 11:53:54,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-02 11:53:54,654 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-10-02 11:53:54,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:54,655 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-02 11:53:54,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:53:54,655 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-02 11:53:54,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 11:53:54,655 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:54,655 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-10-02 11:53:54,656 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:54,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:54,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1842330444, now seen corresponding path program 4 times [2018-10-02 11:53:54,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:54,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:54,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:54,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:54,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:54,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:54,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:54,709 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 [2018-10-02 11:53:54,724 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:54,750 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:54,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:54,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:54,755 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:54,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:54,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:53:54,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:53:54,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:53:54,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:54,784 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-10-02 11:53:54,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:54,847 INFO L93 Difference]: Finished difference Result 24 states and 33 transitions. [2018-10-02 11:53:54,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:53:54,847 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-02 11:53:54,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:54,847 INFO L225 Difference]: With dead ends: 24 [2018-10-02 11:53:54,848 INFO L226 Difference]: Without dead ends: 22 [2018-10-02 11:53:54,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:54,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-02 11:53:54,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2018-10-02 11:53:54,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-02 11:53:54,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-10-02 11:53:54,854 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-10-02 11:53:54,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:54,854 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-10-02 11:53:54,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:53:54,855 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-10-02 11:53:54,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:53:54,855 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:54,855 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-10-02 11:53:54,855 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:54,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:54,856 INFO L82 PathProgramCache]: Analyzing trace with hash 183654063, now seen corresponding path program 5 times [2018-10-02 11:53:54,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:54,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:54,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:54,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:54,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:54,973 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:54,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:54,974 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) [2018-10-02 11:53:54,987 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:55,013 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-02 11:53:55,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:55,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:55,042 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:55,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:53:55,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:53:55,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:53:55,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:55,044 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 8 states. [2018-10-02 11:53:55,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:55,097 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-02 11:53:55,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:53:55,097 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:53:55,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:55,097 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:53:55,097 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:53:55,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:55,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:53:55,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-10-02 11:53:55,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:53:55,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-02 11:53:55,109 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-02 11:53:55,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:55,110 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-02 11:53:55,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:53:55,110 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-02 11:53:55,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:53:55,110 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:55,110 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-02 11:53:55,110 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:55,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:55,111 INFO L82 PathProgramCache]: Analyzing trace with hash 183655985, now seen corresponding path program 23 times [2018-10-02 11:53:55,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:55,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:55,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:55,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:55,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:55,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:55,189 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 [2018-10-02 11:53:55,197 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:55,205 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-02 11:53:55,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:55,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:55,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:55,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:53:55,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:53:55,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:53:55,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:55,233 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-02 11:53:55,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:55,270 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-02 11:53:55,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:53:55,270 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:53:55,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:55,271 INFO L225 Difference]: With dead ends: 31 [2018-10-02 11:53:55,271 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 11:53:55,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:55,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 11:53:55,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-10-02 11:53:55,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 11:53:55,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-02 11:53:55,282 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-10-02 11:53:55,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:55,282 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-02 11:53:55,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:53:55,283 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-02 11:53:55,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:53:55,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:55,283 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-02 11:53:55,283 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:55,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:55,284 INFO L82 PathProgramCache]: Analyzing trace with hash 185501105, now seen corresponding path program 24 times [2018-10-02 11:53:55,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:55,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:55,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:55,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:55,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:55,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:55,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:55,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:53:55,367 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:55,375 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-02 11:53:55,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:55,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:55,380 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:55,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:55,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:53:55,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:53:55,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:53:55,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:55,405 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-10-02 11:53:55,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:55,495 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-02 11:53:55,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:53:55,495 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:53:55,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:55,495 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:53:55,495 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:53:55,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:55,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:53:55,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-10-02 11:53:55,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:53:55,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-02 11:53:55,508 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-02 11:53:55,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:55,508 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-02 11:53:55,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:53:55,509 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-02 11:53:55,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:53:55,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:55,509 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-02 11:53:55,510 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:55,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:55,510 INFO L82 PathProgramCache]: Analyzing trace with hash 185503027, now seen corresponding path program 25 times [2018-10-02 11:53:55,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:55,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:55,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:55,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:55,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:55,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:55,589 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 [2018-10-02 11:53:55,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:55,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:55,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:55,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:53:55,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:53:55,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:53:55,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:55,647 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-02 11:53:55,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:55,692 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-02 11:53:55,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:53:55,692 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:53:55,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:55,693 INFO L225 Difference]: With dead ends: 31 [2018-10-02 11:53:55,693 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 11:53:55,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:55,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 11:53:55,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-10-02 11:53:55,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-02 11:53:55,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-02 11:53:55,707 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-10-02 11:53:55,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:55,707 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-02 11:53:55,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:53:55,707 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-02 11:53:55,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:53:55,707 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:55,708 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-02 11:53:55,708 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:55,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:55,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1958661425, now seen corresponding path program 26 times [2018-10-02 11:53:55,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:55,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:55,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:55,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:55,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:55,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:55,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:55,877 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 [2018-10-02 11:53:55,884 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:55,918 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:55,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:55,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:55,923 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:55,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:55,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:53:55,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:53:55,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:53:55,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:55,957 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-10-02 11:53:56,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:56,152 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-02 11:53:56,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:53:56,152 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:53:56,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:56,153 INFO L225 Difference]: With dead ends: 29 [2018-10-02 11:53:56,153 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 11:53:56,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:56,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 11:53:56,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-10-02 11:53:56,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:53:56,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-02 11:53:56,165 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-02 11:53:56,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:56,165 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-02 11:53:56,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:53:56,165 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-02 11:53:56,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:53:56,166 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:56,166 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-02 11:53:56,166 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:56,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:56,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1958663347, now seen corresponding path program 27 times [2018-10-02 11:53:56,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:56,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:56,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:56,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:56,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:56,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:56,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:56,222 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 [2018-10-02 11:53:56,231 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:56,237 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-02 11:53:56,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:56,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:56,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:56,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:53:56,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:53:56,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:53:56,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:56,264 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-02 11:53:56,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:56,312 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-02 11:53:56,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:53:56,312 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:53:56,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:56,312 INFO L225 Difference]: With dead ends: 29 [2018-10-02 11:53:56,313 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 11:53:56,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:56,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 11:53:56,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-10-02 11:53:56,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 11:53:56,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-02 11:53:56,326 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-10-02 11:53:56,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:56,326 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-02 11:53:56,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:53:56,326 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-02 11:53:56,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:53:56,327 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:56,327 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-02 11:53:56,327 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:56,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:56,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1960508467, now seen corresponding path program 28 times [2018-10-02 11:53:56,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:56,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:56,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:56,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:56,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:56,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:56,418 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 [2018-10-02 11:53:56,426 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:56,432 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:56,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:56,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:56,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:56,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:53:56,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:53:56,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:53:56,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:56,464 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-10-02 11:53:56,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:56,514 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-10-02 11:53:56,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:53:56,514 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:53:56,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:56,515 INFO L225 Difference]: With dead ends: 27 [2018-10-02 11:53:56,515 INFO L226 Difference]: Without dead ends: 25 [2018-10-02 11:53:56,515 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:56,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-02 11:53:56,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-10-02 11:53:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:53:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-02 11:53:56,529 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-02 11:53:56,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:56,530 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-02 11:53:56,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:53:56,530 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-02 11:53:56,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:53:56,530 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:56,530 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-02 11:53:56,531 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:56,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:56,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1960510389, now seen corresponding path program 29 times [2018-10-02 11:53:56,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:56,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:56,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:56,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:56,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:56,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:56,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:56,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:53:56,601 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:56,610 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-02 11:53:56,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:56,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:56,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:56,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:53:56,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:53:56,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:53:56,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:56,639 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-02 11:53:56,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:56,678 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-10-02 11:53:56,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:53:56,679 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:53:56,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:56,680 INFO L225 Difference]: With dead ends: 26 [2018-10-02 11:53:56,680 INFO L226 Difference]: Without dead ends: 24 [2018-10-02 11:53:56,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:56,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-02 11:53:56,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-10-02 11:53:56,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-02 11:53:56,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-02 11:53:56,691 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-10-02 11:53:56,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:56,691 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-02 11:53:56,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:53:56,691 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-02 11:53:56,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:53:56,691 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:56,691 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-02 11:53:56,691 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:56,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:56,692 INFO L82 PathProgramCache]: Analyzing trace with hash 863712433, now seen corresponding path program 30 times [2018-10-02 11:53:56,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:56,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:56,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:56,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:56,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:56,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:56,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:53:56,855 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:56,894 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-02 11:53:56,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:56,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:56,898 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:56,918 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:56,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:53:56,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:53:56,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:53:56,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:56,919 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-10-02 11:53:56,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:56,966 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-02 11:53:56,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:53:56,967 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:53:56,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:56,967 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:53:56,967 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:53:56,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:56,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:53:56,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-10-02 11:53:56,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:53:56,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-02 11:53:56,981 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-02 11:53:56,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:56,981 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-02 11:53:56,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:53:56,981 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-02 11:53:56,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:53:56,982 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:56,982 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-02 11:53:56,982 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:56,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:56,982 INFO L82 PathProgramCache]: Analyzing trace with hash 863714355, now seen corresponding path program 31 times [2018-10-02 11:53:56,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:56,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:56,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:56,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:56,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:57,036 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:57,037 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:57,037 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:53:57,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:57,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:57,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:57,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:53:57,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:53:57,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:53:57,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:57,079 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-02 11:53:57,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:57,137 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-02 11:53:57,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:53:57,137 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:53:57,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:57,138 INFO L225 Difference]: With dead ends: 31 [2018-10-02 11:53:57,138 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 11:53:57,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:57,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 11:53:57,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-10-02 11:53:57,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 11:53:57,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-02 11:53:57,153 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-10-02 11:53:57,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:57,153 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-02 11:53:57,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:53:57,153 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-02 11:53:57,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:53:57,153 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:57,154 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-02 11:53:57,154 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:57,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:57,154 INFO L82 PathProgramCache]: Analyzing trace with hash 865559475, now seen corresponding path program 32 times [2018-10-02 11:53:57,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:57,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:57,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:57,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:57,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:57,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:57,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:53:57,347 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:57,353 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:57,353 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:57,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:57,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:57,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:53:57,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:53:57,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:53:57,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:57,379 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-10-02 11:53:57,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:57,437 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-02 11:53:57,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:53:57,438 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:53:57,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:57,438 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:53:57,438 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:53:57,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:57,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:53:57,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-10-02 11:53:57,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:53:57,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-02 11:53:57,451 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-02 11:53:57,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:57,451 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-02 11:53:57,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:53:57,451 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-02 11:53:57,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:53:57,452 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:57,452 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-02 11:53:57,452 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:57,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:57,452 INFO L82 PathProgramCache]: Analyzing trace with hash 865561397, now seen corresponding path program 33 times [2018-10-02 11:53:57,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:57,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:57,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:57,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:57,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:57,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:57,504 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 [2018-10-02 11:53:57,515 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:57,525 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-02 11:53:57,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:57,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:57,549 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:57,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:53:57,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:53:57,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:53:57,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:57,550 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-02 11:53:57,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:57,628 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-02 11:53:57,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:53:57,628 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:53:57,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:57,629 INFO L225 Difference]: With dead ends: 31 [2018-10-02 11:53:57,629 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 11:53:57,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:57,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 11:53:57,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-10-02 11:53:57,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-02 11:53:57,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-02 11:53:57,645 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-10-02 11:53:57,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:57,645 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-02 11:53:57,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:53:57,646 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-02 11:53:57,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:53:57,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:57,646 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-02 11:53:57,646 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:57,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:57,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1656247501, now seen corresponding path program 34 times [2018-10-02 11:53:57,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:57,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:57,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:57,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:57,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:57,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:57,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:57,814 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 [2018-10-02 11:53:57,822 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:57,830 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:57,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:57,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:57,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:57,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:53:57,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:53:57,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:53:57,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:57,855 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-10-02 11:53:57,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:57,888 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-02 11:53:57,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:53:57,888 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:53:57,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:57,889 INFO L225 Difference]: With dead ends: 29 [2018-10-02 11:53:57,889 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 11:53:57,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:57,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 11:53:57,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-10-02 11:53:57,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:53:57,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-02 11:53:57,904 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-02 11:53:57,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:57,904 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-02 11:53:57,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:53:57,904 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-02 11:53:57,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:53:57,904 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:57,904 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-02 11:53:57,904 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:57,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:57,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1656245579, now seen corresponding path program 35 times [2018-10-02 11:53:57,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:57,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:57,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:57,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:57,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:57,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:57,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:53:57,981 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:57,989 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-02 11:53:57,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:57,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:58,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:58,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:53:58,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:53:58,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:53:58,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:58,015 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-02 11:53:58,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:58,054 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-02 11:53:58,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:53:58,054 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:53:58,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:58,054 INFO L225 Difference]: With dead ends: 29 [2018-10-02 11:53:58,054 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 11:53:58,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:58,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 11:53:58,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-10-02 11:53:58,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 11:53:58,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-02 11:53:58,068 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-10-02 11:53:58,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:58,068 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-02 11:53:58,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:53:58,068 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-02 11:53:58,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:53:58,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:58,069 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-02 11:53:58,069 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:58,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:58,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1654400459, now seen corresponding path program 36 times [2018-10-02 11:53:58,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:58,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:58,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:58,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:58,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:58,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:58,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:53:58,131 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:58,138 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-02 11:53:58,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:58,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:58,171 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:58,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:53:58,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:53:58,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:53:58,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:58,173 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-10-02 11:53:58,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:58,235 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-10-02 11:53:58,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:53:58,238 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:53:58,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:58,238 INFO L225 Difference]: With dead ends: 27 [2018-10-02 11:53:58,238 INFO L226 Difference]: Without dead ends: 25 [2018-10-02 11:53:58,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:58,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-02 11:53:58,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-10-02 11:53:58,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:53:58,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-02 11:53:58,252 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-02 11:53:58,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:58,253 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-02 11:53:58,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:53:58,253 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-02 11:53:58,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:53:58,253 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:58,253 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-02 11:53:58,253 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:58,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:58,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1654398537, now seen corresponding path program 37 times [2018-10-02 11:53:58,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:58,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:58,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:58,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:58,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:58,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:58,299 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:58,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:58,300 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 [2018-10-02 11:53:58,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:58,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:58,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:58,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:53:58,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:53:58,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:53:58,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:58,339 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-02 11:53:58,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:58,399 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-10-02 11:53:58,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:53:58,399 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:53:58,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:58,400 INFO L225 Difference]: With dead ends: 26 [2018-10-02 11:53:58,400 INFO L226 Difference]: Without dead ends: 24 [2018-10-02 11:53:58,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:58,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-02 11:53:58,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-10-02 11:53:58,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-02 11:53:58,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-02 11:53:58,412 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-10-02 11:53:58,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:58,412 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-02 11:53:58,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:53:58,412 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-02 11:53:58,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:53:58,413 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:58,413 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-02 11:53:58,413 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:58,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:58,413 INFO L82 PathProgramCache]: Analyzing trace with hash 884718641, now seen corresponding path program 38 times [2018-10-02 11:53:58,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:58,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:58,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:58,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:58,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:58,494 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:58,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:58,494 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 [2018-10-02 11:53:58,501 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:58,511 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:58,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:58,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:58,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:58,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:53:58,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:53:58,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:53:58,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:58,541 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-10-02 11:53:58,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:58,634 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-02 11:53:58,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:53:58,634 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:53:58,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:58,635 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:53:58,635 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:53:58,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:58,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:53:58,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-10-02 11:53:58,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:53:58,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:53:58,655 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-02 11:53:58,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:58,656 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:53:58,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:53:58,656 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:53:58,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:53:58,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:58,656 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-02 11:53:58,656 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:58,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:58,657 INFO L82 PathProgramCache]: Analyzing trace with hash 884720563, now seen corresponding path program 39 times [2018-10-02 11:53:58,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:58,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:58,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:58,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:58,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:58,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:59,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:59,224 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 [2018-10-02 11:53:59,232 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:59,242 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-02 11:53:59,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:59,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:59,246 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:59,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:59,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:53:59,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:53:59,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:53:59,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:59,267 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-02 11:53:59,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:59,440 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-02 11:53:59,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:53:59,440 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:53:59,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:59,441 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:53:59,441 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:53:59,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:59,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:53:59,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-10-02 11:53:59,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:53:59,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-02 11:53:59,462 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-02 11:53:59,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:59,462 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-02 11:53:59,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:53:59,463 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-02 11:53:59,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:53:59,463 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:59,463 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-02 11:53:59,463 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:59,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:59,463 INFO L82 PathProgramCache]: Analyzing trace with hash 886565683, now seen corresponding path program 40 times [2018-10-02 11:53:59,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:59,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:59,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:59,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:59,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:59,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:59,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:53:59,535 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:59,540 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:59,540 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:59,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:59,544 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:59,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:59,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:53:59,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:53:59,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:53:59,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:59,564 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-02 11:53:59,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:59,613 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-02 11:53:59,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:53:59,613 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:53:59,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:59,614 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:53:59,614 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:53:59,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:59,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:53:59,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-10-02 11:53:59,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:53:59,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:53:59,635 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-02 11:53:59,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:59,636 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:53:59,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:53:59,636 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:53:59,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:53:59,636 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:59,636 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-02 11:53:59,636 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:59,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:59,637 INFO L82 PathProgramCache]: Analyzing trace with hash 886567605, now seen corresponding path program 41 times [2018-10-02 11:53:59,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:59,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:59,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:59,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:59,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:59,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:59,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:59,806 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 [2018-10-02 11:53:59,814 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:59,821 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-02 11:53:59,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:59,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:59,826 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:59,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:59,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:53:59,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:53:59,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:53:59,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:59,846 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-02 11:53:59,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:59,897 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-02 11:53:59,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:53:59,898 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:53:59,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:59,898 INFO L225 Difference]: With dead ends: 35 [2018-10-02 11:53:59,898 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 11:53:59,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:59,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 11:53:59,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 20. [2018-10-02 11:53:59,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 11:53:59,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-02 11:53:59,917 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-10-02 11:53:59,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:59,917 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-02 11:53:59,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:53:59,918 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-02 11:53:59,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:53:59,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:59,918 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-02 11:53:59,918 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:59,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:59,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1635241293, now seen corresponding path program 42 times [2018-10-02 11:53:59,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:59,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:59,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:59,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:59,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:59,967 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:59,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:59,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:53:59,975 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:59,980 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-02 11:53:59,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:59,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:00,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:00,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:54:00,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:54:00,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:54:00,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:00,004 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-10-02 11:54:00,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:00,159 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-02 11:54:00,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:54:00,159 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:54:00,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:00,159 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:54:00,159 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:54:00,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:00,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:54:00,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-10-02 11:54:00,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:54:00,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:54:00,179 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-02 11:54:00,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:00,179 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:54:00,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:54:00,180 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:54:00,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:54:00,180 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:00,180 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-02 11:54:00,180 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:00,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:00,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1635239371, now seen corresponding path program 43 times [2018-10-02 11:54:00,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:00,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:00,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:00,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:00,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:00,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:00,236 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 [2018-10-02 11:54:00,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:00,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:00,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:00,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:54:00,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:54:00,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:54:00,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:00,273 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-02 11:54:00,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:00,347 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-02 11:54:00,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:54:00,347 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:54:00,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:00,347 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:54:00,347 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:54:00,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:00,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:54:00,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-10-02 11:54:00,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:54:00,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-02 11:54:00,365 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-02 11:54:00,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:00,365 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-02 11:54:00,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:54:00,365 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-02 11:54:00,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:54:00,365 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:00,365 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-02 11:54:00,365 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:00,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:00,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1633394251, now seen corresponding path program 44 times [2018-10-02 11:54:00,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:00,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:00,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:00,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:00,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:00,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:00,410 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 [2018-10-02 11:54:00,418 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:00,423 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:00,423 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:00,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:00,427 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:00,446 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:00,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:54:00,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:54:00,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:54:00,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:00,447 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-02 11:54:00,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:00,536 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-02 11:54:00,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:54:00,536 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:54:00,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:00,537 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:54:00,537 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:54:00,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:00,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:54:00,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-10-02 11:54:00,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:54:00,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:54:00,556 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-02 11:54:00,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:00,557 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:54:00,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:54:00,557 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:54:00,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:54:00,557 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:00,557 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-02 11:54:00,557 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:00,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:00,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1633392329, now seen corresponding path program 45 times [2018-10-02 11:54:00,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:00,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:00,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:00,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:00,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:00,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:00,621 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 [2018-10-02 11:54:00,629 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:00,637 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-02 11:54:00,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:00,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:00,642 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:00,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:00,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:54:00,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:54:00,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:54:00,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:00,666 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-02 11:54:00,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:00,730 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-02 11:54:00,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:54:00,731 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:54:00,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:00,731 INFO L225 Difference]: With dead ends: 35 [2018-10-02 11:54:00,731 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 11:54:00,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:00,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 11:54:00,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2018-10-02 11:54:00,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-02 11:54:00,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-02 11:54:00,748 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-10-02 11:54:00,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:00,748 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-02 11:54:00,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:54:00,748 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-02 11:54:00,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:54:00,749 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:00,749 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-02 11:54:00,749 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:00,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:00,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1564777011, now seen corresponding path program 46 times [2018-10-02 11:54:00,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:00,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:00,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:00,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:00,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:00,813 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:00,813 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:00,813 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 [2018-10-02 11:54:00,821 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:00,825 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:00,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:00,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:00,829 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:00,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:00,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:54:00,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:54:00,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:54:00,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:00,849 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-10-02 11:54:00,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:00,907 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-02 11:54:00,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:54:00,907 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:54:00,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:00,907 INFO L225 Difference]: With dead ends: 35 [2018-10-02 11:54:00,907 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 11:54:00,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:00,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 11:54:00,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-10-02 11:54:00,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:54:00,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:54:00,935 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-02 11:54:00,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:00,935 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:54:00,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:54:00,935 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:54:00,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:54:00,935 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:00,935 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-02 11:54:00,935 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:00,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:00,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1564778933, now seen corresponding path program 47 times [2018-10-02 11:54:00,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:00,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:00,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:00,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:00,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:00,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:00,996 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:00,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:00,997 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:01,006 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:01,011 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-02 11:54:01,012 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:01,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:01,015 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:01,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:01,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:54:01,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:54:01,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:54:01,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:01,041 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-02 11:54:01,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:01,122 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-02 11:54:01,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:54:01,122 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:54:01,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:01,122 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:54:01,122 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:54:01,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:01,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:54:01,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-10-02 11:54:01,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:54:01,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-02 11:54:01,150 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-02 11:54:01,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:01,150 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-02 11:54:01,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:54:01,150 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-02 11:54:01,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:54:01,151 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:01,151 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-02 11:54:01,151 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:01,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:01,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1566624053, now seen corresponding path program 48 times [2018-10-02 11:54:01,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:01,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:01,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:01,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:01,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:01,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:01,239 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:01,247 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:01,254 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-02 11:54:01,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:01,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:01,277 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:01,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:54:01,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:54:01,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:54:01,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:01,278 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-02 11:54:01,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:01,340 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-02 11:54:01,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:54:01,341 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:54:01,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:01,341 INFO L225 Difference]: With dead ends: 35 [2018-10-02 11:54:01,341 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 11:54:01,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:01,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 11:54:01,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-10-02 11:54:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:54:01,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:54:01,364 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-02 11:54:01,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:01,364 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:54:01,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:54:01,364 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:54:01,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:54:01,365 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:01,365 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-02 11:54:01,365 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:01,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:01,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1566625975, now seen corresponding path program 49 times [2018-10-02 11:54:01,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:01,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:01,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:01,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:01,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:01,458 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:01,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:01,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:01,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:01,479 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:01,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:01,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:54:01,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:54:01,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:54:01,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:01,509 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-02 11:54:01,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:01,665 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-02 11:54:01,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:54:01,665 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:54:01,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:01,666 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:54:01,666 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:54:01,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:01,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:54:01,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2018-10-02 11:54:01,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 11:54:01,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-02 11:54:01,689 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-10-02 11:54:01,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:01,689 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-02 11:54:01,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:54:01,689 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-02 11:54:01,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:54:01,689 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:01,689 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-02 11:54:01,690 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:01,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:01,690 INFO L82 PathProgramCache]: Analyzing trace with hash -955182923, now seen corresponding path program 50 times [2018-10-02 11:54:01,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:01,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:01,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:01,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:01,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:01,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:01,738 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:01,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:01,738 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 [2018-10-02 11:54:01,747 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:01,752 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:01,752 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:01,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:01,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:01,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:54:01,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:54:01,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:54:01,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:01,778 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-10-02 11:54:01,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:01,844 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-02 11:54:01,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:54:01,844 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:54:01,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:01,844 INFO L225 Difference]: With dead ends: 31 [2018-10-02 11:54:01,845 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 11:54:01,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:01,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 11:54:01,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2018-10-02 11:54:01,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:54:01,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:54:01,871 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-02 11:54:01,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:01,871 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:54:01,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:54:01,871 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:54:01,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:54:01,871 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:01,871 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-02 11:54:01,872 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:01,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:01,872 INFO L82 PathProgramCache]: Analyzing trace with hash -955181001, now seen corresponding path program 51 times [2018-10-02 11:54:01,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:01,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:01,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:01,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:01,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:01,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:01,918 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 [2018-10-02 11:54:01,927 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:01,938 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-02 11:54:01,939 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:01,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:01,942 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:01,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:01,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:54:01,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:54:01,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:54:01,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:01,963 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-02 11:54:02,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:02,026 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-02 11:54:02,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:54:02,027 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:54:02,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:02,027 INFO L225 Difference]: With dead ends: 31 [2018-10-02 11:54:02,028 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 11:54:02,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:02,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 11:54:02,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-10-02 11:54:02,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:54:02,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-02 11:54:02,060 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-02 11:54:02,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:02,060 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-02 11:54:02,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:54:02,060 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-02 11:54:02,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:54:02,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:02,061 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-02 11:54:02,061 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:02,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:02,061 INFO L82 PathProgramCache]: Analyzing trace with hash -953335881, now seen corresponding path program 52 times [2018-10-02 11:54:02,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:02,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:02,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:02,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:02,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:02,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:02,146 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:02,154 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:02,159 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:02,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:02,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:02,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:02,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:54:02,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:54:02,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:54:02,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:02,183 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-02 11:54:02,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:02,240 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-02 11:54:02,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:54:02,240 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:54:02,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:02,241 INFO L225 Difference]: With dead ends: 29 [2018-10-02 11:54:02,241 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 11:54:02,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:02,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 11:54:02,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-10-02 11:54:02,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:54:02,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:54:02,267 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-02 11:54:02,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:02,268 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:54:02,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:54:02,268 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:54:02,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:54:02,268 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:02,268 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-10-02 11:54:02,268 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:02,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:02,268 INFO L82 PathProgramCache]: Analyzing trace with hash -953333959, now seen corresponding path program 5 times [2018-10-02 11:54:02,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:02,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:02,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:02,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:02,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:02,318 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:02,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:02,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:02,327 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:02,336 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-02 11:54:02,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:02,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:02,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:02,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:54:02,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:54:02,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:54:02,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:02,364 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-02 11:54:02,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:02,420 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2018-10-02 11:54:02,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:54:02,420 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:54:02,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:02,420 INFO L225 Difference]: With dead ends: 28 [2018-10-02 11:54:02,420 INFO L226 Difference]: Without dead ends: 26 [2018-10-02 11:54:02,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:02,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-02 11:54:02,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2018-10-02 11:54:02,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-02 11:54:02,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-02 11:54:02,438 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-10-02 11:54:02,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:02,439 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-02 11:54:02,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:54:02,439 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-02 11:54:02,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:02,439 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:02,439 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-10-02 11:54:02,439 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:02,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:02,440 INFO L82 PathProgramCache]: Analyzing trace with hash 397590258, now seen corresponding path program 6 times [2018-10-02 11:54:02,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:02,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:02,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:02,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:02,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:02,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:02,494 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 [2018-10-02 11:54:02,505 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:02,512 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:54:02,513 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:02,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:02,518 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:02,537 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:02,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:02,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:02,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:02,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:02,538 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 9 states. [2018-10-02 11:54:02,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:02,626 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:54:02,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:02,626 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:02,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:02,627 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:54:02,627 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:54:02,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:02,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:54:02,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-10-02 11:54:02,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:02,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:02,659 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-02 11:54:02,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:02,660 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:02,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:02,660 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:02,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:02,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:02,660 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-02 11:54:02,661 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:02,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:02,661 INFO L82 PathProgramCache]: Analyzing trace with hash 397592180, now seen corresponding path program 53 times [2018-10-02 11:54:02,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:02,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:02,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:02,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:02,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:02,767 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:02,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:02,768 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 [2018-10-02 11:54:02,780 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:02,795 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-02 11:54:02,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:02,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:02,800 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:02,819 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:02,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:02,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:02,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:02,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:02,820 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-02 11:54:02,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:02,912 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:54:02,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:02,912 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:02,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:02,913 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:54:02,913 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:54:02,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:02,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:54:02,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-10-02 11:54:02,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:54:02,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:54:02,943 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-02 11:54:02,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:02,943 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:54:02,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:02,943 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:54:02,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:02,943 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:02,944 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-02 11:54:02,944 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:02,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:02,944 INFO L82 PathProgramCache]: Analyzing trace with hash 399437300, now seen corresponding path program 54 times [2018-10-02 11:54:02,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:02,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:02,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:02,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:02,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:03,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:03,013 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 [2018-10-02 11:54:03,020 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:03,029 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:54:03,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:03,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:03,034 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:03,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:03,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:03,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:03,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:03,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:03,055 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-02 11:54:03,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:03,173 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-02 11:54:03,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:03,173 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:03,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:03,173 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:54:03,173 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:54:03,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:03,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:54:03,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-10-02 11:54:03,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:03,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:03,204 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-02 11:54:03,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:03,204 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:03,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:03,204 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:03,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:03,205 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:03,205 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:03,205 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:03,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:03,205 INFO L82 PathProgramCache]: Analyzing trace with hash 399439222, now seen corresponding path program 55 times [2018-10-02 11:54:03,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:03,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:03,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:03,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:03,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:03,363 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:03,364 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 [2018-10-02 11:54:03,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:03,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:03,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:03,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:03,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:03,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:03,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:03,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:03,403 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-02 11:54:03,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:03,484 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-02 11:54:03,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:03,484 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:03,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:03,485 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:54:03,485 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:54:03,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:03,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:54:03,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-10-02 11:54:03,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:54:03,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-02 11:54:03,513 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-10-02 11:54:03,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:03,513 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-02 11:54:03,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:03,513 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-02 11:54:03,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:03,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:03,513 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-02 11:54:03,513 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:03,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:03,514 INFO L82 PathProgramCache]: Analyzing trace with hash -2122369676, now seen corresponding path program 56 times [2018-10-02 11:54:03,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:03,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:03,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:03,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:03,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:03,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:03,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:03,627 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:03,634 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:03,639 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:03,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:03,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:03,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:03,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:03,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:03,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:03,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:03,663 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-10-02 11:54:03,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:03,792 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:54:03,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:03,792 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:03,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:03,792 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:54:03,792 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:54:03,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:03,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:54:03,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-10-02 11:54:03,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:03,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:03,825 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-02 11:54:03,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:03,825 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:03,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:03,825 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:03,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:03,825 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:03,825 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:03,826 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:03,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:03,826 INFO L82 PathProgramCache]: Analyzing trace with hash -2122367754, now seen corresponding path program 57 times [2018-10-02 11:54:03,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:03,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:03,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:03,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:03,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:03,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:03,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:03,895 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:03,905 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-02 11:54:03,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:03,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:03,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:03,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:03,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:03,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:03,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:03,930 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-02 11:54:04,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:04,019 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:54:04,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:04,019 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:04,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:04,020 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:54:04,020 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:54:04,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:04,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:54:04,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-10-02 11:54:04,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:54:04,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:54:04,051 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-02 11:54:04,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:04,052 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:54:04,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:04,052 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:54:04,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:04,052 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:04,052 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:04,052 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:04,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:04,052 INFO L82 PathProgramCache]: Analyzing trace with hash -2120522634, now seen corresponding path program 58 times [2018-10-02 11:54:04,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:04,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:04,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:04,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:04,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:04,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:04,134 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 [2018-10-02 11:54:04,142 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:04,171 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:04,171 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:04,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:04,202 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:04,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:04,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:04,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:04,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:04,203 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-02 11:54:04,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:04,300 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-02 11:54:04,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:04,300 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:04,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:04,300 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:54:04,300 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:54:04,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:04,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:54:04,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-10-02 11:54:04,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:04,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:04,332 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-02 11:54:04,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:04,332 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:04,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:04,333 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:04,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:04,333 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:04,333 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-02 11:54:04,333 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:04,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:04,333 INFO L82 PathProgramCache]: Analyzing trace with hash -2120520712, now seen corresponding path program 59 times [2018-10-02 11:54:04,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:04,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:04,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:04,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:04,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:04,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:04,775 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 [2018-10-02 11:54:04,784 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:04,797 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-02 11:54:04,797 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:04,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:04,801 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:04,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:04,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:04,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:04,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:04,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:04,821 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-02 11:54:04,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:04,899 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-02 11:54:04,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:04,899 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:04,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:04,899 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:54:04,900 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:54:04,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:04,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:54:04,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-10-02 11:54:04,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 11:54:04,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-02 11:54:04,928 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-10-02 11:54:04,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:04,928 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-02 11:54:04,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:04,929 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-02 11:54:04,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:04,929 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:04,929 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-02 11:54:04,929 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:04,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:04,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1077648628, now seen corresponding path program 60 times [2018-10-02 11:54:04,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:04,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:04,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:04,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:04,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:04,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:04,992 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 [2018-10-02 11:54:04,998 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:05,006 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:54:05,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:05,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:05,010 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:05,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:05,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:05,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:05,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:05,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:05,034 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-10-02 11:54:05,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:05,121 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-02 11:54:05,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:05,121 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:05,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:05,122 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:54:05,122 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:54:05,122 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:05,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:54:05,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-02 11:54:05,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:05,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:05,160 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-02 11:54:05,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:05,160 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:05,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:05,160 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:05,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:05,160 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:05,160 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:05,161 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:05,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:05,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1077650550, now seen corresponding path program 61 times [2018-10-02 11:54:05,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:05,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:05,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:05,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:05,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:05,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:05,308 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 [2018-10-02 11:54:05,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:05,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:05,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:05,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:05,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:05,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:05,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:05,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:05,362 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-02 11:54:05,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:05,454 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-02 11:54:05,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:05,454 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:05,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:05,455 INFO L225 Difference]: With dead ends: 35 [2018-10-02 11:54:05,455 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 11:54:05,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:05,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 11:54:05,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-10-02 11:54:05,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:54:05,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:54:05,489 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-02 11:54:05,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:05,489 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:54:05,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:05,489 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:54:05,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:05,490 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:05,490 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:05,490 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:05,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:05,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1079495670, now seen corresponding path program 62 times [2018-10-02 11:54:05,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:05,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:05,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:05,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:05,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:05,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:05,544 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 [2018-10-02 11:54:05,551 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:05,556 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:05,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:05,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:05,560 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:05,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:05,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:05,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:05,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:05,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:05,581 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-02 11:54:05,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:05,678 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-02 11:54:05,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:05,678 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:05,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:05,679 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:54:05,679 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:54:05,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:05,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:54:05,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-02 11:54:05,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:05,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:05,715 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-02 11:54:05,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:05,715 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:05,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:05,715 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:05,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:05,715 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:05,715 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-02 11:54:05,716 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:05,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:05,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1079497592, now seen corresponding path program 63 times [2018-10-02 11:54:05,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:05,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:05,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:05,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:05,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:05,780 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:05,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:05,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:05,789 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:05,798 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-02 11:54:05,798 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:05,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:05,824 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:05,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:05,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:05,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:05,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:05,825 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-02 11:54:05,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:05,919 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-02 11:54:05,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:05,920 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:05,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:05,920 INFO L225 Difference]: With dead ends: 35 [2018-10-02 11:54:05,920 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 11:54:05,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:05,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 11:54:05,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-10-02 11:54:05,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:54:05,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-02 11:54:05,954 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-10-02 11:54:05,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:05,954 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-02 11:54:05,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:05,955 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-02 11:54:05,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:05,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:05,955 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:05,955 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:05,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:05,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1442311306, now seen corresponding path program 64 times [2018-10-02 11:54:05,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:05,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:05,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:05,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:05,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:06,006 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:06,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:06,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:06,015 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:06,022 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:06,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:06,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:06,027 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:06,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:06,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:06,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:06,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:06,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:06,048 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-10-02 11:54:06,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:06,136 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-02 11:54:06,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:06,136 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:06,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:06,137 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:54:06,137 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:54:06,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:06,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:54:06,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-10-02 11:54:06,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:06,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:06,178 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-02 11:54:06,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:06,178 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:06,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:06,178 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:06,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:06,178 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:06,179 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-02 11:54:06,179 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:06,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:06,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1442309384, now seen corresponding path program 65 times [2018-10-02 11:54:06,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:06,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:06,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:06,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:06,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:06,276 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:06,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:06,276 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 [2018-10-02 11:54:06,285 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:06,293 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-02 11:54:06,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:06,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:06,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:06,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:06,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:06,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:06,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:06,317 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-02 11:54:06,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:06,391 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-02 11:54:06,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:06,392 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:06,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:06,392 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:54:06,392 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:54:06,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:06,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:54:06,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-10-02 11:54:06,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:54:06,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:54:06,426 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-02 11:54:06,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:06,427 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:54:06,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:06,427 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:54:06,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:06,427 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:06,427 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-02 11:54:06,427 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:06,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:06,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1440464264, now seen corresponding path program 66 times [2018-10-02 11:54:06,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:06,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:06,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:06,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:06,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:06,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:06,672 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 [2018-10-02 11:54:06,680 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:06,688 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:54:06,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:06,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:06,713 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:06,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:06,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:06,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:06,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:06,713 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-02 11:54:06,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:06,776 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-02 11:54:06,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:06,776 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:06,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:06,777 INFO L225 Difference]: With dead ends: 31 [2018-10-02 11:54:06,777 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 11:54:06,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:06,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 11:54:06,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-10-02 11:54:06,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:06,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:06,813 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-02 11:54:06,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:06,813 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:06,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:06,814 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:06,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:06,814 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:06,814 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:06,814 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:06,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:06,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1440462342, now seen corresponding path program 67 times [2018-10-02 11:54:06,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:06,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:06,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:06,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:06,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:06,869 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:06,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:06,869 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:06,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:06,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:06,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:06,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:06,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:06,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:06,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:06,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:06,904 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-02 11:54:06,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:06,996 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-10-02 11:54:06,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:06,996 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:06,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:06,997 INFO L225 Difference]: With dead ends: 30 [2018-10-02 11:54:06,997 INFO L226 Difference]: Without dead ends: 28 [2018-10-02 11:54:06,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:06,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-02 11:54:07,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-10-02 11:54:07,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-02 11:54:07,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-02 11:54:07,021 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-10-02 11:54:07,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:07,022 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-02 11:54:07,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:07,022 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-02 11:54:07,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:07,022 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:07,022 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-02 11:54:07,022 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:07,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:07,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1098654836, now seen corresponding path program 68 times [2018-10-02 11:54:07,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:07,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:07,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:07,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:07,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:07,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:07,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:07,101 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:07,106 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:07,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:07,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:07,110 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:07,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:07,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:07,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:07,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:07,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:07,131 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-10-02 11:54:07,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:07,233 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:54:07,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:07,233 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:07,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:07,233 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:54:07,233 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:54:07,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:07,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:54:07,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-10-02 11:54:07,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:07,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:07,275 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-02 11:54:07,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:07,275 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:07,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:07,275 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:07,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:07,275 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:07,275 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:07,276 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:07,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:07,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1098656758, now seen corresponding path program 69 times [2018-10-02 11:54:07,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:07,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:07,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:07,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:07,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:07,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:07,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:07,331 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:07,339 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:07,347 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-02 11:54:07,348 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:07,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:07,352 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:07,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:07,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:07,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:07,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:07,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:07,372 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-02 11:54:07,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:07,481 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:54:07,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:07,481 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:07,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:07,482 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:54:07,482 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:54:07,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:07,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:54:07,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-10-02 11:54:07,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:54:07,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:54:07,522 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-02 11:54:07,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:07,523 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:54:07,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:07,523 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:54:07,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:07,523 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:07,523 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:07,523 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:07,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:07,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1100501878, now seen corresponding path program 70 times [2018-10-02 11:54:07,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:07,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:07,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:07,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:07,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:07,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:07,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:07,585 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:07,590 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:07,590 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:07,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:07,613 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:07,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:07,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:07,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:07,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:07,614 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-02 11:54:07,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:07,714 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-02 11:54:07,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:07,714 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:07,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:07,715 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:54:07,715 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:54:07,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:07,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:54:07,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-10-02 11:54:07,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:07,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:07,758 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-02 11:54:07,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:07,759 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:07,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:07,759 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:07,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:07,759 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:07,759 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-02 11:54:07,759 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:07,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:07,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1100503800, now seen corresponding path program 71 times [2018-10-02 11:54:07,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:07,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:07,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:07,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:07,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:07,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:07,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:07,820 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:07,828 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-02 11:54:07,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:07,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:07,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:07,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:07,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:07,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:07,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:07,852 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-02 11:54:07,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:07,967 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-02 11:54:07,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:07,967 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:07,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:07,968 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:54:07,968 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:54:07,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:07,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:54:08,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-10-02 11:54:08,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:54:08,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-02 11:54:08,004 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-10-02 11:54:08,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:08,005 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-02 11:54:08,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:08,005 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-02 11:54:08,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:08,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:08,005 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:08,005 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:08,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:08,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1421305098, now seen corresponding path program 72 times [2018-10-02 11:54:08,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:08,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:08,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:08,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:08,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:08,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:08,084 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:08,084 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:08,091 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:08,102 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:54:08,103 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:08,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:08,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:08,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:08,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:08,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:08,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:08,127 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-10-02 11:54:08,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:08,267 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:54:08,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:08,267 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:08,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:08,267 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:54:08,267 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:54:08,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:08,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:54:08,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-10-02 11:54:08,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:08,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:08,313 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-02 11:54:08,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:08,313 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:08,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:08,313 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:08,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:08,314 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:08,314 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-02 11:54:08,314 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:08,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:08,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1421303176, now seen corresponding path program 73 times [2018-10-02 11:54:08,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:08,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:08,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:08,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:08,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:08,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:08,400 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:08,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:08,400 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 [2018-10-02 11:54:08,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:08,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:08,437 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:08,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:08,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:08,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:08,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:08,438 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-02 11:54:08,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:08,542 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:54:08,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:08,542 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:08,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:08,543 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:54:08,543 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:54:08,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:08,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:54:08,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-10-02 11:54:08,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:54:08,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:54:08,584 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-02 11:54:08,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:08,584 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:54:08,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:08,584 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:54:08,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:08,585 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:08,585 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-02 11:54:08,585 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:08,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:08,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1419458056, now seen corresponding path program 74 times [2018-10-02 11:54:08,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:08,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:08,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:08,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:08,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:08,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:08,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:08,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:08,658 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:08,676 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:08,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:08,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:08,700 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:08,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:08,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:08,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:08,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:08,701 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-02 11:54:08,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:08,808 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-02 11:54:08,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:08,808 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:08,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:08,808 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:54:08,808 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:54:08,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:08,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:54:08,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-10-02 11:54:08,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:08,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:08,851 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-02 11:54:08,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:08,852 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:08,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:08,852 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:08,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:08,852 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:08,852 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:08,853 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:08,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:08,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1419456134, now seen corresponding path program 75 times [2018-10-02 11:54:08,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:08,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:08,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:08,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:08,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:08,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:08,968 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 [2018-10-02 11:54:08,975 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:08,982 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-02 11:54:08,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:08,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:08,986 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:09,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:09,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:09,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:09,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:09,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:09,007 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-02 11:54:09,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:09,110 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-02 11:54:09,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:09,111 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:09,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:09,111 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:54:09,111 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:54:09,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:09,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:54:09,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-10-02 11:54:09,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 11:54:09,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-02 11:54:09,144 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-10-02 11:54:09,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:09,144 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-02 11:54:09,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:09,145 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-02 11:54:09,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:09,145 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:09,145 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:09,145 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:09,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:09,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1778713206, now seen corresponding path program 76 times [2018-10-02 11:54:09,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:09,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:09,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:09,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:09,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:09,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:09,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:09,192 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:09,202 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:09,206 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:09,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:09,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:09,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:09,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:09,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:09,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:09,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:09,231 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-10-02 11:54:09,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:09,326 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-02 11:54:09,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:09,326 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:09,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:09,327 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:54:09,327 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:54:09,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:09,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:54:09,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-02 11:54:09,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:09,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:09,375 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-02 11:54:09,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:09,376 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:09,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:09,376 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:09,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:09,376 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:09,376 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-02 11:54:09,376 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:09,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:09,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1778715128, now seen corresponding path program 77 times [2018-10-02 11:54:09,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:09,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:09,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:09,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:09,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:09,431 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:09,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:09,432 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 [2018-10-02 11:54:09,440 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:09,447 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-02 11:54:09,447 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:09,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:09,451 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:09,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:09,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:09,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:09,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:09,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:09,476 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-02 11:54:09,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:09,588 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-02 11:54:09,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:09,588 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:09,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:09,589 INFO L225 Difference]: With dead ends: 35 [2018-10-02 11:54:09,589 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 11:54:09,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:09,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 11:54:09,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-10-02 11:54:09,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:54:09,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:54:09,628 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-02 11:54:09,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:09,628 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:54:09,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:09,628 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:54:09,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:09,629 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:09,629 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-02 11:54:09,629 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:09,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:09,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1780560248, now seen corresponding path program 78 times [2018-10-02 11:54:09,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:09,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:09,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:09,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:09,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:09,700 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:09,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:09,701 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 [2018-10-02 11:54:09,708 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:09,719 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:54:09,719 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:09,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:09,743 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:09,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:09,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:09,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:09,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:09,744 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-02 11:54:09,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:09,854 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-02 11:54:09,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:09,854 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:09,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:09,855 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:54:09,855 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:54:09,856 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:09,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:54:09,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-02 11:54:09,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:09,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:09,908 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-02 11:54:09,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:09,908 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:09,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:09,909 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:09,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:09,909 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:09,909 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:09,909 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:09,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:09,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1780562170, now seen corresponding path program 79 times [2018-10-02 11:54:09,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:09,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:09,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:09,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:09,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:09,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:09,973 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 [2018-10-02 11:54:09,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:09,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:10,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:10,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:10,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:10,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:10,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:10,021 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-02 11:54:10,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:10,122 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-02 11:54:10,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:10,123 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:10,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:10,123 INFO L225 Difference]: With dead ends: 35 [2018-10-02 11:54:10,123 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 11:54:10,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:10,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 11:54:10,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-10-02 11:54:10,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:54:10,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-02 11:54:10,163 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-10-02 11:54:10,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:10,163 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-02 11:54:10,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:10,163 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-02 11:54:10,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:10,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:10,164 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-02 11:54:10,164 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:10,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:10,164 INFO L82 PathProgramCache]: Analyzing trace with hash -741246728, now seen corresponding path program 80 times [2018-10-02 11:54:10,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:10,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:10,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:10,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:10,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:10,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:10,432 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 [2018-10-02 11:54:10,441 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:10,446 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:10,446 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:10,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:10,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:10,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:10,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:10,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:10,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:10,469 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-10-02 11:54:10,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:10,553 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-02 11:54:10,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:10,553 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:10,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:10,553 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:54:10,553 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:54:10,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:10,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:54:10,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-10-02 11:54:10,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:10,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:10,598 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-02 11:54:10,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:10,599 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:10,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:10,599 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:10,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:10,599 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:10,599 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:10,600 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:10,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:10,600 INFO L82 PathProgramCache]: Analyzing trace with hash -741244806, now seen corresponding path program 81 times [2018-10-02 11:54:10,600 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:10,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:10,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:10,601 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:10,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:10,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:10,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:10,748 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:10,755 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-02 11:54:10,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:10,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:10,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:10,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:10,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:10,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:10,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:10,780 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-02 11:54:10,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:10,867 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-02 11:54:10,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:10,867 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:10,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:10,868 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:54:10,868 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:54:10,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:10,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:54:10,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-10-02 11:54:10,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:54:10,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:54:10,910 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-02 11:54:10,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:10,910 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:54:10,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:10,911 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:54:10,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:10,911 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:10,911 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:10,911 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:10,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:10,911 INFO L82 PathProgramCache]: Analyzing trace with hash -739399686, now seen corresponding path program 82 times [2018-10-02 11:54:10,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:10,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:10,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:10,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:10,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:10,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:10,960 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 [2018-10-02 11:54:10,969 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:10,978 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:10,979 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:10,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:11,001 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:11,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:11,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:11,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:11,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:11,002 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-02 11:54:11,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:11,094 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-02 11:54:11,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:11,094 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:11,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:11,095 INFO L225 Difference]: With dead ends: 31 [2018-10-02 11:54:11,095 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 11:54:11,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:11,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 11:54:11,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-10-02 11:54:11,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:11,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:11,144 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-02 11:54:11,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:11,144 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:11,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:11,144 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:11,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:11,145 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:11,145 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-02 11:54:11,145 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:11,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:11,145 INFO L82 PathProgramCache]: Analyzing trace with hash -739397764, now seen corresponding path program 83 times [2018-10-02 11:54:11,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:11,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:11,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:11,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:11,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:11,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:11,199 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 [2018-10-02 11:54:11,207 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:11,218 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-02 11:54:11,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:11,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:11,222 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:11,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:11,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:11,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:11,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:11,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:11,243 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-02 11:54:11,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:11,324 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-10-02 11:54:11,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:11,324 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:11,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:11,325 INFO L225 Difference]: With dead ends: 30 [2018-10-02 11:54:11,325 INFO L226 Difference]: Without dead ends: 28 [2018-10-02 11:54:11,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:11,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-02 11:54:11,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-10-02 11:54:11,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-02 11:54:11,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-02 11:54:11,356 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-10-02 11:54:11,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:11,356 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-02 11:54:11,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:11,356 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-02 11:54:11,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:11,356 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:11,357 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-02 11:54:11,357 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:11,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:11,357 INFO L82 PathProgramCache]: Analyzing trace with hash -189215756, now seen corresponding path program 84 times [2018-10-02 11:54:11,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:11,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:11,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:11,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:11,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:11,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:11,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:11,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:11,424 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:11,433 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:54:11,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:11,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:11,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:11,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:11,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:11,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:11,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:11,459 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-10-02 11:54:11,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:11,602 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:54:11,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:11,602 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:11,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:11,603 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:54:11,603 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:54:11,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:11,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:54:11,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-02 11:54:11,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:11,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:11,657 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-02 11:54:11,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:11,657 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:11,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:11,657 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:11,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:11,658 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:11,658 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:11,658 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:11,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:11,658 INFO L82 PathProgramCache]: Analyzing trace with hash -189213834, now seen corresponding path program 85 times [2018-10-02 11:54:11,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:11,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:11,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:11,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:11,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:11,724 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:11,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:11,724 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 [2018-10-02 11:54:11,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:11,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:11,741 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:11,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:11,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:11,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:11,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:11,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:11,761 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-02 11:54:11,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:11,899 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:54:11,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:11,899 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:11,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:11,899 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:54:11,899 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:54:11,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:11,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:54:11,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-10-02 11:54:11,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:11,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:11,953 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-02 11:54:11,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:11,953 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:11,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:11,953 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:11,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:11,953 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:11,954 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:11,954 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:11,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:11,954 INFO L82 PathProgramCache]: Analyzing trace with hash -187368714, now seen corresponding path program 86 times [2018-10-02 11:54:11,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:11,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:11,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:11,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:11,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:12,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:12,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:12,038 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:12,042 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:12,043 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:12,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:12,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:12,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:12,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:12,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:12,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:12,069 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-02 11:54:12,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:12,224 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:54:12,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:12,224 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:12,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:12,225 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:54:12,225 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:54:12,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:12,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:54:12,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-02 11:54:12,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:12,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:12,277 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-02 11:54:12,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:12,277 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:12,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:12,277 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:12,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:12,278 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:12,278 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-02 11:54:12,278 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:12,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:12,278 INFO L82 PathProgramCache]: Analyzing trace with hash -187366792, now seen corresponding path program 87 times [2018-10-02 11:54:12,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:12,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:12,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:12,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:12,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:12,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:12,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:12,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:12,360 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:12,367 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-02 11:54:12,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:12,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:12,390 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:12,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:12,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:12,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:12,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:12,391 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-02 11:54:12,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:12,591 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:54:12,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:12,591 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:12,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:12,592 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:54:12,592 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:54:12,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:12,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:54:12,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-10-02 11:54:12,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:54:12,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:54:12,668 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-02 11:54:12,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:12,668 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:54:12,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:12,668 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:54:12,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:12,668 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:12,669 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:12,669 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:12,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:12,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1585791606, now seen corresponding path program 88 times [2018-10-02 11:54:12,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:12,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:12,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:12,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:12,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:13,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:13,421 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 [2018-10-02 11:54:13,436 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:13,470 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:13,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:13,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:13,509 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:13,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:13,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:13,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:13,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:13,511 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-02 11:54:14,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:14,010 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:54:14,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:14,011 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:14,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:14,011 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:54:14,011 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:54:14,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:14,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:54:14,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-02 11:54:14,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:14,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:14,066 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-02 11:54:14,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:14,066 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:14,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:14,067 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:14,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:14,067 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:14,067 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-02 11:54:14,067 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:14,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:14,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1585793528, now seen corresponding path program 89 times [2018-10-02 11:54:14,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:14,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:14,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:14,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:14,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:14,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:14,132 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 [2018-10-02 11:54:14,139 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:14,147 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-02 11:54:14,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:14,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:14,174 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:14,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:14,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:14,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:14,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:14,175 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-02 11:54:14,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:14,337 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:54:14,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:14,337 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:14,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:14,338 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:54:14,338 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:54:14,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:14,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:54:14,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-10-02 11:54:14,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:14,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:14,394 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-02 11:54:14,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:14,394 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:14,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:14,394 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:14,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:14,395 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:14,395 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-02 11:54:14,395 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:14,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:14,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1587638648, now seen corresponding path program 90 times [2018-10-02 11:54:14,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:14,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:14,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:14,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:14,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:14,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:14,503 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 [2018-10-02 11:54:14,510 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:14,518 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:54:14,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:14,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:14,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:14,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:14,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:14,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:14,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:14,543 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-02 11:54:14,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:14,680 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-02 11:54:14,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:14,680 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:14,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:14,681 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:54:14,681 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:54:14,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:14,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:54:14,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-10-02 11:54:14,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:14,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:14,740 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-02 11:54:14,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:14,741 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:14,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:14,741 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:14,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:14,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:14,741 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:14,742 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:14,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:14,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1587640570, now seen corresponding path program 91 times [2018-10-02 11:54:14,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:14,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:14,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:14,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:14,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:14,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:14,806 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 [2018-10-02 11:54:14,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:14,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:14,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:14,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:14,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:14,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:14,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:14,843 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-02 11:54:14,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:14,989 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:54:14,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:14,989 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:14,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:14,989 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:54:14,989 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:54:14,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:14,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:54:15,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 22. [2018-10-02 11:54:15,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:54:15,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-02 11:54:15,038 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-10-02 11:54:15,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:15,038 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-02 11:54:15,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:15,038 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-02 11:54:15,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:15,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:15,039 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:15,039 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:15,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:15,047 INFO L82 PathProgramCache]: Analyzing trace with hash 490842614, now seen corresponding path program 92 times [2018-10-02 11:54:15,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:15,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:15,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:15,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:15,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:15,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:15,193 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 [2018-10-02 11:54:15,199 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:15,205 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:15,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:15,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:15,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:15,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:15,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:15,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:15,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:15,239 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-10-02 11:54:15,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:15,395 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:54:15,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:15,395 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:15,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:15,395 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:54:15,395 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:54:15,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:15,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:54:15,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-02 11:54:15,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:15,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:15,458 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-02 11:54:15,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:15,458 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:15,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:15,458 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:15,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:15,459 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:15,459 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-02 11:54:15,459 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:15,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:15,459 INFO L82 PathProgramCache]: Analyzing trace with hash 490844536, now seen corresponding path program 93 times [2018-10-02 11:54:15,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:15,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:15,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:15,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:15,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:15,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:15,520 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 [2018-10-02 11:54:15,527 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:15,536 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-02 11:54:15,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:15,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:15,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:15,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:15,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:15,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:15,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:15,560 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-02 11:54:15,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:15,770 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:54:15,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:15,771 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:15,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:15,771 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:54:15,771 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:54:15,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:15,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:54:15,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-10-02 11:54:15,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:15,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:15,866 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-02 11:54:15,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:15,867 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:15,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:15,867 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:15,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:15,867 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:15,867 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-02 11:54:15,868 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:15,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:15,868 INFO L82 PathProgramCache]: Analyzing trace with hash 492689656, now seen corresponding path program 94 times [2018-10-02 11:54:15,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:15,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:15,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:15,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:15,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:16,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:16,262 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 [2018-10-02 11:54:16,270 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:16,275 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:16,275 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:16,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:16,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:16,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:16,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:16,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:16,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:16,298 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-02 11:54:16,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:16,446 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:54:16,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:16,446 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:16,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:16,447 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:54:16,447 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:54:16,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:16,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:54:16,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-02 11:54:16,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:16,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:16,507 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-02 11:54:16,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:16,508 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:16,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:16,508 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:16,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:16,508 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:16,508 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:16,508 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:16,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:16,508 INFO L82 PathProgramCache]: Analyzing trace with hash 492691578, now seen corresponding path program 95 times [2018-10-02 11:54:16,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:16,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:16,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:16,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:16,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:16,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:16,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:16,616 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:16,624 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-02 11:54:16,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:16,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:16,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:16,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:16,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:16,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:16,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:16,649 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-02 11:54:16,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:16,786 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:54:16,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:16,786 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:16,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:16,787 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:54:16,787 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:54:16,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:16,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:54:16,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-10-02 11:54:16,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:54:16,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:54:16,840 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-02 11:54:16,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:16,840 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:54:16,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:16,840 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:54:16,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:16,840 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:16,841 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-02 11:54:16,841 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:16,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:16,841 INFO L82 PathProgramCache]: Analyzing trace with hash -2029117320, now seen corresponding path program 96 times [2018-10-02 11:54:16,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:16,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:16,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:16,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:16,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:16,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:16,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:16,904 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:16,911 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:54:16,911 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:16,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:16,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:16,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:16,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:16,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:16,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:16,934 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-02 11:54:17,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:17,067 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:54:17,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:17,067 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:17,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:17,068 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:54:17,068 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:54:17,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:17,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:54:17,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-02 11:54:17,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:17,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:17,128 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-02 11:54:17,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:17,128 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:17,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:17,128 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:17,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:17,129 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:17,129 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:17,129 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:17,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:17,129 INFO L82 PathProgramCache]: Analyzing trace with hash -2029115398, now seen corresponding path program 97 times [2018-10-02 11:54:17,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:17,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:17,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:17,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:17,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:17,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:17,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:17,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:17,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:17,255 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:17,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:17,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:17,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:17,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:17,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:17,276 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-02 11:54:17,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:17,414 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:54:17,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:17,414 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:17,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:17,415 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:54:17,415 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:54:17,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:17,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:54:17,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-10-02 11:54:17,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:17,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:17,474 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-02 11:54:17,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:17,474 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:17,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:17,474 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:17,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:17,475 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:17,475 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:17,475 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:17,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:17,475 INFO L82 PathProgramCache]: Analyzing trace with hash -2027270278, now seen corresponding path program 98 times [2018-10-02 11:54:17,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:17,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:17,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:17,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:17,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:18,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:18,237 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 [2018-10-02 11:54:18,250 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:18,281 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:18,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:18,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:18,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:18,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:18,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:18,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:18,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:18,316 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-02 11:54:18,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:18,460 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-02 11:54:18,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:18,460 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:18,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:18,460 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:54:18,460 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:54:18,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:18,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:54:18,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-10-02 11:54:18,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:18,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:18,516 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-02 11:54:18,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:18,516 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:18,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:18,516 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:18,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:18,516 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:18,517 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-02 11:54:18,517 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:18,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:18,517 INFO L82 PathProgramCache]: Analyzing trace with hash -2027268356, now seen corresponding path program 99 times [2018-10-02 11:54:18,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:18,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:18,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:18,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:18,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:18,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:18,594 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 [2018-10-02 11:54:18,602 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:18,610 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-02 11:54:18,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:18,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:18,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:18,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:18,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:18,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:18,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:18,636 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-02 11:54:18,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:18,764 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:54:18,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:18,765 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:18,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:18,765 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:54:18,765 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:54:18,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:18,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:54:18,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 20. [2018-10-02 11:54:18,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 11:54:18,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-02 11:54:18,808 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-10-02 11:54:18,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:18,808 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-02 11:54:18,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:18,808 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-02 11:54:18,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:18,809 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:18,809 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:18,809 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:18,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:18,809 INFO L82 PathProgramCache]: Analyzing trace with hash 511848822, now seen corresponding path program 100 times [2018-10-02 11:54:18,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:18,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:18,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:18,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:18,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:18,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:18,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:18,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:18,896 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:18,902 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:18,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:18,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:18,905 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:18,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:18,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:18,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:18,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:18,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:18,925 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-10-02 11:54:19,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:19,116 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-02 11:54:19,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:19,116 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:19,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:19,116 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:54:19,116 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:54:19,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:19,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:54:19,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-10-02 11:54:19,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:19,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:19,177 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-02 11:54:19,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:19,178 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:19,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:19,178 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:19,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:19,178 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:19,178 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-02 11:54:19,178 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:19,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:19,179 INFO L82 PathProgramCache]: Analyzing trace with hash 511850744, now seen corresponding path program 101 times [2018-10-02 11:54:19,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:19,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:19,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:19,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:19,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:19,248 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:19,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:19,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:19,257 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:19,268 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-02 11:54:19,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:19,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:19,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:19,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:19,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:19,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:19,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:19,290 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-02 11:54:19,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:19,446 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-02 11:54:19,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:19,446 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:19,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:19,447 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:54:19,447 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:54:19,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:19,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:54:19,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-10-02 11:54:19,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:19,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:19,512 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-02 11:54:19,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:19,512 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:19,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:19,512 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:19,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:19,512 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:19,512 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-02 11:54:19,513 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:19,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:19,513 INFO L82 PathProgramCache]: Analyzing trace with hash 513695864, now seen corresponding path program 102 times [2018-10-02 11:54:19,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:19,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:19,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:19,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:19,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:19,566 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:19,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:19,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:19,574 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:19,582 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:54:19,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:19,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:19,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:19,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:19,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:19,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:19,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:19,606 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-02 11:54:19,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:19,760 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:54:19,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:19,760 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:19,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:19,761 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:54:19,761 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:54:19,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:19,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:54:19,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-10-02 11:54:19,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:19,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:19,837 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-02 11:54:19,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:19,838 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:19,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:19,838 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:19,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:19,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:19,838 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:19,838 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:19,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:19,839 INFO L82 PathProgramCache]: Analyzing trace with hash 513697786, now seen corresponding path program 103 times [2018-10-02 11:54:19,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:19,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:19,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:19,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:19,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:19,898 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:19,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:19,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:19,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:19,923 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:19,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:19,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:19,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:19,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:19,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:19,944 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-02 11:54:20,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:20,073 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-02 11:54:20,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:20,080 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:20,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:20,080 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:54:20,080 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:54:20,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:20,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:54:20,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-10-02 11:54:20,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:54:20,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:54:20,139 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-02 11:54:20,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:20,140 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:54:20,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:20,140 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:54:20,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:20,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:20,140 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-02 11:54:20,140 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:20,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:20,140 INFO L82 PathProgramCache]: Analyzing trace with hash -2008111112, now seen corresponding path program 104 times [2018-10-02 11:54:20,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:20,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:20,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:20,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:20,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:20,190 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:20,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:20,191 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 [2018-10-02 11:54:20,197 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:20,203 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:20,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:20,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:20,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:20,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:20,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:20,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:20,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:20,228 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-02 11:54:20,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:20,376 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-02 11:54:20,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:20,376 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:20,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:20,377 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:54:20,377 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:54:20,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:20,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:54:20,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-10-02 11:54:20,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:20,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:20,450 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-02 11:54:20,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:20,450 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:20,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:20,451 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:20,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:20,451 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:20,451 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:20,451 INFO L423 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:20,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:20,451 INFO L82 PathProgramCache]: Analyzing trace with hash -2008109190, now seen corresponding path program 105 times [2018-10-02 11:54:20,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:20,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:20,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:20,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:20,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:20,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:20,510 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 [2018-10-02 11:54:20,518 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:20,525 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-02 11:54:20,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:20,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:20,529 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:20,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:20,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:20,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:20,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:20,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:20,549 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-02 11:54:20,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:20,704 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-02 11:54:20,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:20,704 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:20,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:20,704 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:54:20,704 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:54:20,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:20,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:54:20,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-10-02 11:54:20,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:20,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:20,770 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-02 11:54:20,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:20,770 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:20,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:20,770 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:20,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:20,771 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:20,771 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:20,771 INFO L423 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:20,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:20,771 INFO L82 PathProgramCache]: Analyzing trace with hash -2006264070, now seen corresponding path program 106 times [2018-10-02 11:54:20,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:20,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:20,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:20,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:20,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:20,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:20,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:20,847 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 [2018-10-02 11:54:20,854 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:20,860 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:20,860 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:20,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:20,862 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:20,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:20,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:20,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:20,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:20,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:20,882 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-02 11:54:21,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:21,023 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:54:21,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:21,023 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:21,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:21,024 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:54:21,024 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:54:21,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:21,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:54:21,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-10-02 11:54:21,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:21,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:21,090 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-02 11:54:21,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:21,090 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:21,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:21,090 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:21,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:21,090 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:21,091 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-02 11:54:21,091 INFO L423 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:21,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:21,091 INFO L82 PathProgramCache]: Analyzing trace with hash -2006262148, now seen corresponding path program 107 times [2018-10-02 11:54:21,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:21,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:21,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:21,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:21,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:21,155 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:21,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:21,156 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 [2018-10-02 11:54:21,164 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:21,171 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-02 11:54:21,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:21,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:21,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:21,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:21,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:21,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:21,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:21,206 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-02 11:54:21,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:21,631 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-02 11:54:21,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:21,631 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:21,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:21,631 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:54:21,632 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:54:21,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:21,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:54:21,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-10-02 11:54:21,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:54:21,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-02 11:54:21,680 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-10-02 11:54:21,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:21,681 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-02 11:54:21,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:21,681 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-02 11:54:21,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:21,681 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:21,681 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-02 11:54:21,681 INFO L423 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:21,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:21,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1191907192, now seen corresponding path program 108 times [2018-10-02 11:54:21,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:21,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:21,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:21,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:21,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:21,729 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:21,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:21,729 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 [2018-10-02 11:54:21,737 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:21,747 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:54:21,747 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:21,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:21,770 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:21,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:21,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:21,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:21,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:21,771 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-10-02 11:54:21,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:21,900 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-02 11:54:21,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:21,900 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:21,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:21,900 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:54:21,900 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:54:21,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:21,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:54:21,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-10-02 11:54:21,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:21,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:21,972 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-02 11:54:21,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:21,973 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:21,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:21,973 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:21,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:21,973 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:21,973 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:21,974 INFO L423 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:21,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:21,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1191909114, now seen corresponding path program 109 times [2018-10-02 11:54:21,974 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:21,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:21,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:21,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:21,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:22,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:22,340 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 [2018-10-02 11:54:22,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:22,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:22,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:22,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:22,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:22,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:22,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:22,377 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-02 11:54:22,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:22,499 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-02 11:54:22,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:22,499 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:22,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:22,500 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:54:22,500 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:54:22,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:22,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:54:22,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-02 11:54:22,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:22,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:22,588 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-02 11:54:22,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:22,588 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:22,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:22,589 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:22,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:22,589 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:22,589 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:22,589 INFO L423 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:22,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:22,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1193754234, now seen corresponding path program 110 times [2018-10-02 11:54:22,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:22,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:22,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:22,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:22,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:22,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:22,824 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:22,832 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:22,838 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:22,838 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:22,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:22,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:22,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:22,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:22,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:22,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:22,866 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-02 11:54:23,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:23,044 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-02 11:54:23,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:23,044 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:23,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:23,045 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:54:23,045 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:54:23,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:23,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:54:23,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-10-02 11:54:23,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:23,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:23,117 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-02 11:54:23,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:23,117 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:23,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:23,117 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:23,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:23,117 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:23,117 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-02 11:54:23,118 INFO L423 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:23,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:23,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1193756156, now seen corresponding path program 111 times [2018-10-02 11:54:23,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:23,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:23,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:23,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:23,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:23,206 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:23,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:23,206 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 [2018-10-02 11:54:23,214 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:23,223 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-02 11:54:23,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:23,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:23,226 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:23,246 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:23,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:23,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:23,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:23,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:23,247 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-02 11:54:23,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:23,370 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-02 11:54:23,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:23,370 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:23,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:23,371 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:54:23,371 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:54:23,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:23,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:54:23,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-10-02 11:54:23,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:54:23,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:54:23,461 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-02 11:54:23,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:23,461 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:54:23,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:23,461 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:54:23,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:23,462 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:23,462 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-02 11:54:23,462 INFO L423 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:23,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:23,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1328052742, now seen corresponding path program 112 times [2018-10-02 11:54:23,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:23,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:23,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:23,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:23,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:23,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:23,924 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:54:23,931 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:23,936 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:23,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:23,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:23,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:23,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:23,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:23,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:23,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:23,961 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-02 11:54:24,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:24,100 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-02 11:54:24,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:24,100 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:24,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:24,101 INFO L225 Difference]: With dead ends: 35 [2018-10-02 11:54:24,101 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 11:54:24,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:24,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 11:54:24,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2018-10-02 11:54:24,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:24,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:24,168 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-02 11:54:24,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:24,168 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:24,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:24,168 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:24,169 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:24,169 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-02 11:54:24,169 INFO L423 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:24,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:24,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1328050820, now seen corresponding path program 113 times [2018-10-02 11:54:24,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:24,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:24,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:24,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:24,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:24,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:24,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:24,232 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:24,239 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-02 11:54:24,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:24,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:24,243 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:24,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:24,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:24,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:24,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:24,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:24,263 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-02 11:54:24,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:24,392 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-02 11:54:24,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:24,393 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:24,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:24,393 INFO L225 Difference]: With dead ends: 35 [2018-10-02 11:54:24,393 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 11:54:24,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:24,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 11:54:24,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2018-10-02 11:54:24,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:24,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:24,457 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-02 11:54:24,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:24,458 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:24,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:24,458 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:24,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:24,458 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:24,458 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-02 11:54:24,458 INFO L423 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:24,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:24,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1326205700, now seen corresponding path program 114 times [2018-10-02 11:54:24,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:24,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:24,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:24,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:24,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:24,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:24,512 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:24,512 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:24,522 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:24,530 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:54:24,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:24,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:24,555 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:24,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:24,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:24,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:24,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:24,555 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-02 11:54:24,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:24,689 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-02 11:54:24,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:24,689 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:24,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:24,690 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:54:24,690 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:54:24,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:24,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:54:24,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-10-02 11:54:24,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:24,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:24,779 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-02 11:54:24,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:24,779 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:24,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:24,779 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:24,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:24,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:24,780 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-10-02 11:54:24,780 INFO L423 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:24,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:24,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1326203778, now seen corresponding path program 6 times [2018-10-02 11:54:24,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:24,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:24,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:24,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:24,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:24,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:24,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:24,845 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:24,853 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:54:24,853 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:24,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:24,884 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:24,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:24,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:24,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:24,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:24,885 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-02 11:54:25,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:25,019 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2018-10-02 11:54:25,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:25,019 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-02 11:54:25,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:25,020 INFO L225 Difference]: With dead ends: 32 [2018-10-02 11:54:25,020 INFO L226 Difference]: Without dead ends: 30 [2018-10-02 11:54:25,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:25,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-02 11:54:25,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 18. [2018-10-02 11:54:25,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-02 11:54:25,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-02 11:54:25,090 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-10-02 11:54:25,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:25,090 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-02 11:54:25,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:25,091 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-02 11:54:25,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:25,091 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:25,091 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-10-02 11:54:25,091 INFO L423 AbstractCegarLoop]: === Iteration 128 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:25,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:25,092 INFO L82 PathProgramCache]: Analyzing trace with hash -168156555, now seen corresponding path program 7 times [2018-10-02 11:54:25,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:25,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:25,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:25,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:25,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:25,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:25,389 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:25,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:25,389 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:25,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:25,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:25,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:25,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:25,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:25,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:25,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:25,429 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 10 states. [2018-10-02 11:54:25,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:25,630 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:54:25,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:25,631 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:25,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:25,631 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:54:25,632 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:54:25,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:25,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:54:25,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-02 11:54:25,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:25,724 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:25,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:25,725 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:25,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:25,725 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:25,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:25,725 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:25,725 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-02 11:54:25,726 INFO L423 AbstractCegarLoop]: === Iteration 129 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:25,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:25,726 INFO L82 PathProgramCache]: Analyzing trace with hash -168154633, now seen corresponding path program 115 times [2018-10-02 11:54:25,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:25,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:25,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:25,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:25,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:25,798 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:25,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:25,798 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:25,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:25,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:25,836 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:25,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:25,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:25,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:25,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:25,837 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:26,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:26,042 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:54:26,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:26,042 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:26,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:26,043 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:54:26,043 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:54:26,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:26,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:54:26,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-02 11:54:26,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:26,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:26,133 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-02 11:54:26,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:26,133 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:26,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:26,133 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:26,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:26,133 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:26,133 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-02 11:54:26,133 INFO L423 AbstractCegarLoop]: === Iteration 130 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:26,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:26,134 INFO L82 PathProgramCache]: Analyzing trace with hash -166309513, now seen corresponding path program 116 times [2018-10-02 11:54:26,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:26,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:26,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:26,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:26,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:26,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:26,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:26,200 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:26,205 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:26,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:26,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:26,237 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:26,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:26,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:26,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:26,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:26,237 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-02 11:54:26,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:26,453 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:54:26,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:26,453 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:26,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:26,454 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:54:26,454 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:54:26,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:26,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:54:26,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-02 11:54:26,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:26,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:26,549 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:26,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:26,549 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:26,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:26,549 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:26,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:26,549 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:26,549 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:54:26,550 INFO L423 AbstractCegarLoop]: === Iteration 131 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:26,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:26,550 INFO L82 PathProgramCache]: Analyzing trace with hash -166307591, now seen corresponding path program 117 times [2018-10-02 11:54:26,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:26,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:26,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:26,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:26,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:26,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:26,621 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:26,628 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:26,639 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-02 11:54:26,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:26,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:26,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:26,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:26,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:26,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:26,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:26,665 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:26,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:26,879 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:54:26,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:26,879 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:26,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:26,880 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:54:26,880 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:54:26,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:26,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:54:26,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-10-02 11:54:26,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:26,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:26,960 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-02 11:54:26,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:26,960 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:26,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:26,960 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:26,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:26,960 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:26,960 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-02 11:54:26,960 INFO L423 AbstractCegarLoop]: === Iteration 132 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:26,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:26,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1606850807, now seen corresponding path program 118 times [2018-10-02 11:54:26,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:26,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:26,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:26,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:26,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:26,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:27,020 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:27,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:27,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:27,028 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:27,034 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:27,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:27,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:27,037 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:27,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:27,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:27,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:27,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:27,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:27,059 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-02 11:54:27,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:27,258 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:54:27,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:27,258 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:27,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:27,259 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:54:27,259 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:54:27,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:27,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:54:27,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-02 11:54:27,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:27,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:27,350 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:27,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:27,351 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:27,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:27,351 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:27,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:27,351 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:27,351 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:54:27,351 INFO L423 AbstractCegarLoop]: === Iteration 133 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:27,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:27,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1606852729, now seen corresponding path program 119 times [2018-10-02 11:54:27,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:27,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:27,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:27,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:27,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:27,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:27,451 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:27,458 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:27,467 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-02 11:54:27,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:27,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:27,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:27,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:27,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:27,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:27,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:27,490 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:27,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:27,684 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:54:27,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:27,684 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:27,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:27,685 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:54:27,685 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:54:27,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:27,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:54:27,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-10-02 11:54:27,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:27,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:27,776 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-02 11:54:27,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:27,776 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:27,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:27,776 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:27,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:27,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:27,776 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:54:27,776 INFO L423 AbstractCegarLoop]: === Iteration 134 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:27,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:27,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1608697849, now seen corresponding path program 120 times [2018-10-02 11:54:27,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:27,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:27,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:27,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:27,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:27,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:27,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:27,993 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:28,000 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 11:54:28,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:28,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:28,005 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:28,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:28,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:28,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:28,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:28,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:28,026 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-02 11:54:28,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:28,218 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:54:28,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:28,218 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:28,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:28,218 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:54:28,218 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:54:28,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:28,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:54:28,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-02 11:54:28,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:28,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:28,303 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:28,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:28,304 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:28,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:28,304 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:28,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:28,304 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:28,304 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:28,304 INFO L423 AbstractCegarLoop]: === Iteration 135 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:28,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:28,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1608699771, now seen corresponding path program 121 times [2018-10-02 11:54:28,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:28,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:28,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:28,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:28,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:28,367 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:28,367 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:28,367 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:28,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:28,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:28,384 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:28,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:28,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:28,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:28,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:28,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:28,406 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:28,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:28,599 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-02 11:54:28,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:28,599 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:28,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:28,600 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:54:28,600 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:54:28,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:28,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:54:28,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-10-02 11:54:28,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:54:28,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:54:28,672 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-10-02 11:54:28,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:28,672 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:54:28,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:28,672 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:54:28,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:28,673 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:28,673 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-02 11:54:28,673 INFO L423 AbstractCegarLoop]: === Iteration 136 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:28,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:28,673 INFO L82 PathProgramCache]: Analyzing trace with hash 511901815, now seen corresponding path program 122 times [2018-10-02 11:54:28,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:28,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:28,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:28,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:28,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:28,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:28,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:28,763 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:28,770 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:28,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:28,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:28,793 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:28,793 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:28,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:28,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:28,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:28,794 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-10-02 11:54:29,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:29,006 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:54:29,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:29,006 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:29,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:29,006 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:54:29,006 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:54:29,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:29,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:54:29,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-02 11:54:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:29,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:29,100 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:29,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:29,100 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:29,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:29,100 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:29,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:29,101 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:29,101 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:54:29,101 INFO L423 AbstractCegarLoop]: === Iteration 137 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:29,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:29,101 INFO L82 PathProgramCache]: Analyzing trace with hash 511903737, now seen corresponding path program 123 times [2018-10-02 11:54:29,101 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:29,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:29,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:29,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:29,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:29,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:29,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:29,274 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:29,286 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-02 11:54:29,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:29,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:29,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:29,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:29,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:29,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:29,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:29,310 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:29,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:29,508 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:54:29,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:29,508 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:29,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:29,509 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:54:29,509 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:54:29,509 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:29,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:54:29,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-02 11:54:29,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:29,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:29,599 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-02 11:54:29,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:29,599 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:29,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:29,599 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:29,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:29,599 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:29,599 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:54:29,600 INFO L423 AbstractCegarLoop]: === Iteration 138 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:29,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:29,600 INFO L82 PathProgramCache]: Analyzing trace with hash 513748857, now seen corresponding path program 124 times [2018-10-02 11:54:29,600 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:29,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:29,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:29,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:29,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:29,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:29,665 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:29,672 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:29,677 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:29,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:29,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:29,681 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:29,702 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:29,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:29,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:29,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:29,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:29,702 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-02 11:54:29,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:29,927 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:54:29,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:29,927 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:29,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:29,928 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:54:29,928 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:54:29,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:29,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:54:30,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-02 11:54:30,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:30,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:30,014 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:30,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:30,014 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:30,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:30,015 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:30,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:30,015 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:30,015 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:30,015 INFO L423 AbstractCegarLoop]: === Iteration 139 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:30,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:30,015 INFO L82 PathProgramCache]: Analyzing trace with hash 513750779, now seen corresponding path program 125 times [2018-10-02 11:54:30,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:30,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:30,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:30,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:30,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:30,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:30,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:30,109 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:30,118 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-02 11:54:30,118 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:30,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:30,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:30,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:30,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:30,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:30,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:30,141 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:30,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:30,342 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:54:30,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:30,342 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:30,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:30,343 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:54:30,343 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:54:30,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:30,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:54:30,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-10-02 11:54:30,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:30,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:30,426 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-02 11:54:30,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:30,426 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:30,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:30,426 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:30,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:30,426 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:30,427 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:54:30,427 INFO L423 AbstractCegarLoop]: === Iteration 140 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:30,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:30,427 INFO L82 PathProgramCache]: Analyzing trace with hash -2008058119, now seen corresponding path program 126 times [2018-10-02 11:54:30,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:30,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:30,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:30,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:30,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:30,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:30,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:30,512 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:30,520 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 11:54:30,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:30,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:30,525 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:30,551 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:30,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:30,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:30,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:30,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:30,552 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-02 11:54:30,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:30,755 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:54:30,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:30,755 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:30,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:30,756 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:54:30,756 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:54:30,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:30,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:54:30,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-02 11:54:30,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:30,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:30,848 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:30,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:30,848 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:30,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:30,848 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:30,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:30,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:30,848 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:30,849 INFO L423 AbstractCegarLoop]: === Iteration 141 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:30,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:30,849 INFO L82 PathProgramCache]: Analyzing trace with hash -2008056197, now seen corresponding path program 127 times [2018-10-02 11:54:30,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:30,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:30,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:30,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:30,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:31,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:31,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:31,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:31,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:31,279 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:31,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:31,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:31,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:31,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:31,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:31,315 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:31,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:31,639 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:54:31,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:31,639 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:31,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:31,640 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:54:31,640 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:54:31,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:31,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:54:31,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-10-02 11:54:31,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:31,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:31,725 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-02 11:54:31,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:31,726 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:31,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:31,726 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:31,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:31,726 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:31,726 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:31,726 INFO L423 AbstractCegarLoop]: === Iteration 142 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:31,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:31,726 INFO L82 PathProgramCache]: Analyzing trace with hash -2006211077, now seen corresponding path program 128 times [2018-10-02 11:54:31,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:31,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:31,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:31,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:31,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:31,849 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:31,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:31,850 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:31,857 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:31,862 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:31,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:31,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:31,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:31,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:31,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:31,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:31,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:31,886 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-02 11:54:32,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:32,082 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:54:32,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:32,082 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:32,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:32,083 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:54:32,083 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:54:32,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:32,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:54:32,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-02 11:54:32,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:32,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:32,190 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:32,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:32,190 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:32,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:32,190 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:32,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:32,190 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:32,190 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:32,190 INFO L423 AbstractCegarLoop]: === Iteration 143 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:32,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:32,191 INFO L82 PathProgramCache]: Analyzing trace with hash -2006209155, now seen corresponding path program 129 times [2018-10-02 11:54:32,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:32,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:32,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:32,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:32,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:32,347 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:32,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:32,348 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:32,356 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:32,364 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-02 11:54:32,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:32,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:32,368 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:32,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:32,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:32,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:32,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:32,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:32,390 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:32,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:32,594 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-02 11:54:32,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:32,594 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:32,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:32,595 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:54:32,595 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:54:32,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:32,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:54:32,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-10-02 11:54:32,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:54:32,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-02 11:54:32,673 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-10-02 11:54:32,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:32,673 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-02 11:54:32,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:32,673 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-02 11:54:32,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:32,673 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:32,674 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-02 11:54:32,674 INFO L423 AbstractCegarLoop]: === Iteration 144 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:32,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:32,674 INFO L82 PathProgramCache]: Analyzing trace with hash 532908023, now seen corresponding path program 130 times [2018-10-02 11:54:32,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:32,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:32,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:32,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:32,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:32,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:32,742 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:32,759 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:32,764 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:32,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:32,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:32,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:32,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:32,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:32,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:32,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:32,789 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-10-02 11:54:33,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:33,020 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:54:33,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:33,020 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:33,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:33,021 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:54:33,021 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:54:33,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:33,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:54:33,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-02 11:54:33,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:33,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:33,118 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:33,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:33,119 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:33,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:33,119 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:33,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:33,119 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:33,119 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:54:33,119 INFO L423 AbstractCegarLoop]: === Iteration 145 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:33,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:33,119 INFO L82 PathProgramCache]: Analyzing trace with hash 532909945, now seen corresponding path program 131 times [2018-10-02 11:54:33,119 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:33,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:33,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:33,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:33,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:33,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:33,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:33,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:33,220 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:33,229 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-02 11:54:33,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:33,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:33,233 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:33,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:33,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:33,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:33,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:33,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:33,254 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:33,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:33,459 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:54:33,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:33,459 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:33,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:33,460 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:54:33,460 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:54:33,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:33,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:54:33,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-02 11:54:33,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:33,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:33,563 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-02 11:54:33,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:33,563 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:33,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:33,563 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:33,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:33,564 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:33,564 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:54:33,564 INFO L423 AbstractCegarLoop]: === Iteration 146 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:33,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:33,564 INFO L82 PathProgramCache]: Analyzing trace with hash 534755065, now seen corresponding path program 132 times [2018-10-02 11:54:33,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:33,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:33,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:33,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:33,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:33,659 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:33,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:33,659 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:33,667 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:33,681 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 11:54:33,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:33,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:33,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:33,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:33,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:33,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:33,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:33,706 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-02 11:54:33,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:33,916 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-02 11:54:33,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:33,916 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:33,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:33,917 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:54:33,917 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:54:33,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:33,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:54:34,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-02 11:54:34,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:34,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:34,022 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:34,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:34,022 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:34,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:34,022 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:34,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:34,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:34,023 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:34,023 INFO L423 AbstractCegarLoop]: === Iteration 147 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:34,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:34,023 INFO L82 PathProgramCache]: Analyzing trace with hash 534756987, now seen corresponding path program 133 times [2018-10-02 11:54:34,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:34,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:34,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:34,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:34,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:34,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:34,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:34,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:34,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:34,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:34,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:34,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:34,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:34,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:34,131 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:34,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:34,316 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:54:34,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:34,316 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:34,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:34,317 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:54:34,317 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:54:34,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:34,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:54:34,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-10-02 11:54:34,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:34,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:34,412 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-02 11:54:34,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:34,412 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:34,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:34,412 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:34,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:34,413 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:34,413 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:54:34,413 INFO L423 AbstractCegarLoop]: === Iteration 148 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:34,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:34,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1987051911, now seen corresponding path program 134 times [2018-10-02 11:54:34,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:34,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:34,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:34,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:34,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:34,524 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:34,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:34,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:34,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:34,538 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:34,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:34,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:34,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:34,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:34,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:34,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:34,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:34,565 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-02 11:54:34,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:34,778 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:54:34,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:34,778 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:34,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:34,779 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:54:34,779 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:54:34,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:34,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:54:34,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-02 11:54:34,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:34,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:34,879 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:34,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:34,880 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:34,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:34,880 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:34,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:34,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:34,880 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:34,880 INFO L423 AbstractCegarLoop]: === Iteration 149 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:34,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:34,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1987049989, now seen corresponding path program 135 times [2018-10-02 11:54:34,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:34,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:34,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:34,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:34,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:34,945 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:34,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:34,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:34,953 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:34,963 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-02 11:54:34,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:34,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:34,987 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:34,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:34,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:34,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:34,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:34,988 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:35,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:35,223 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:54:35,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:35,223 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:35,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:35,223 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:54:35,223 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:54:35,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:35,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:54:35,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-02 11:54:35,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:35,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:35,320 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-02 11:54:35,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:35,320 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:35,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:35,320 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:35,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:35,321 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:35,321 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:35,321 INFO L423 AbstractCegarLoop]: === Iteration 150 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:35,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:35,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1985204869, now seen corresponding path program 136 times [2018-10-02 11:54:35,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:35,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:35,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:35,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:35,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:35,381 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:35,381 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:35,389 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:35,396 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:35,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:35,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:35,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:35,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:35,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:35,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:35,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:35,421 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-02 11:54:35,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:35,633 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-02 11:54:35,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:35,633 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:35,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:35,634 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:54:35,634 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:54:35,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:35,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:54:35,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-02 11:54:35,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:35,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:35,731 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:35,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:35,731 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:35,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:35,732 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:35,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:35,732 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:35,732 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:35,732 INFO L423 AbstractCegarLoop]: === Iteration 151 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:35,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:35,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1985202947, now seen corresponding path program 137 times [2018-10-02 11:54:35,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:35,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:35,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:35,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:35,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:35,807 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:35,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:35,815 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:35,825 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-02 11:54:35,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:35,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:35,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:35,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:35,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:35,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:35,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:35,848 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:36,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:36,032 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:54:36,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:36,032 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:36,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:36,033 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:54:36,033 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:54:36,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:36,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:54:36,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-10-02 11:54:36,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:54:36,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:54:36,115 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-10-02 11:54:36,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:36,115 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:54:36,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:36,115 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:54:36,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:36,115 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:36,115 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:54:36,116 INFO L423 AbstractCegarLoop]: === Iteration 152 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:36,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:36,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1212966393, now seen corresponding path program 138 times [2018-10-02 11:54:36,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:36,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:36,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:36,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:36,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:36,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:36,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:36,224 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:36,233 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 11:54:36,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:36,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:36,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:36,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:36,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:36,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:36,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:36,259 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-10-02 11:54:36,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:36,467 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:54:36,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:36,467 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:36,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:36,467 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:54:36,467 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:54:36,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:36,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:54:36,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-10-02 11:54:36,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:36,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:36,572 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:36,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:36,572 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:36,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:36,572 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:36,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:36,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:36,573 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:36,573 INFO L423 AbstractCegarLoop]: === Iteration 153 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:36,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:36,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1212968315, now seen corresponding path program 139 times [2018-10-02 11:54:36,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:36,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:36,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:36,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:36,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:36,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:36,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:36,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:36,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:36,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:36,663 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:36,684 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:36,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:36,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:36,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:36,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:36,685 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:36,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:36,876 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-02 11:54:36,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:36,876 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:36,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:36,877 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:54:36,877 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:54:36,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:36,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:54:37,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-10-02 11:54:37,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:37,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:37,003 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-02 11:54:37,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:37,003 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:37,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:37,003 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:37,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:37,004 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:37,004 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:37,004 INFO L423 AbstractCegarLoop]: === Iteration 154 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:37,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:37,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1214813435, now seen corresponding path program 140 times [2018-10-02 11:54:37,004 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:37,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:37,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:37,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:37,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:37,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:37,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:37,077 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:37,085 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:37,107 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:37,108 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:37,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:37,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:37,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:37,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:37,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:37,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:37,132 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-02 11:54:37,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:37,346 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:54:37,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:37,346 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:37,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:37,347 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:54:37,347 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:54:37,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:37,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:54:37,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-10-02 11:54:37,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:37,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:37,460 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:37,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:37,460 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:37,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:37,460 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:37,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:37,460 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:37,460 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:37,461 INFO L423 AbstractCegarLoop]: === Iteration 155 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:37,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:37,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1214815357, now seen corresponding path program 141 times [2018-10-02 11:54:37,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:37,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:37,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:37,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:37,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:37,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:37,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:37,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:37,533 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:37,542 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-02 11:54:37,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:37,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:37,566 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:37,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:37,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:37,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:37,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:37,567 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:37,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:37,769 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-02 11:54:37,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:37,769 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:37,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:37,769 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:54:37,769 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:54:37,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:37,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:54:37,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-10-02 11:54:37,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:37,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:37,875 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-02 11:54:37,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:37,875 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:37,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:37,875 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:37,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:37,875 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:37,875 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:37,875 INFO L423 AbstractCegarLoop]: === Iteration 156 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:37,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:37,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1306993541, now seen corresponding path program 142 times [2018-10-02 11:54:37,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:37,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:37,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:37,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:37,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:37,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:37,944 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:37,952 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:37,958 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:37,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:37,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:37,960 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:37,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:37,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:37,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:37,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:37,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:37,981 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-02 11:54:38,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:38,164 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-02 11:54:38,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:38,164 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:38,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:38,164 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:54:38,164 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:54:38,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:38,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:54:38,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-10-02 11:54:38,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:38,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:38,277 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:38,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:38,277 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:38,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:38,277 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:38,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:38,278 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:38,278 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:38,278 INFO L423 AbstractCegarLoop]: === Iteration 157 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:38,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:38,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1306991619, now seen corresponding path program 143 times [2018-10-02 11:54:38,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:38,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:38,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:38,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:38,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:38,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:38,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:38,347 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:38,356 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-02 11:54:38,356 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:38,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:38,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:38,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:38,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:38,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:38,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:38,382 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:38,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:38,574 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-02 11:54:38,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:38,574 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:38,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:38,575 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:54:38,575 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:54:38,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:38,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:54:38,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-10-02 11:54:38,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:38,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:38,681 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-02 11:54:38,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:38,681 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:38,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:38,681 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:38,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:38,681 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:38,681 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:38,681 INFO L423 AbstractCegarLoop]: === Iteration 158 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:38,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:38,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1305146499, now seen corresponding path program 144 times [2018-10-02 11:54:38,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:38,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:38,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:38,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:38,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:38,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:38,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:38,761 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:38,796 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 11:54:38,796 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:38,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:38,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:38,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:38,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:38,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:38,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:38,819 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-02 11:54:38,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:38,986 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-02 11:54:38,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:38,986 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:38,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:38,987 INFO L225 Difference]: With dead ends: 35 [2018-10-02 11:54:38,987 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 11:54:38,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:38,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 11:54:39,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-10-02 11:54:39,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:39,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:39,093 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:39,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:39,093 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:39,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:39,093 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:39,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:39,094 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:39,094 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:54:39,094 INFO L423 AbstractCegarLoop]: === Iteration 159 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:39,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:39,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1305144577, now seen corresponding path program 145 times [2018-10-02 11:54:39,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:39,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:39,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:39,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:39,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:39,154 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:39,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:39,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:39,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:39,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:39,176 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:39,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:39,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:39,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:39,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:39,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:39,197 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:39,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:39,347 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-10-02 11:54:39,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:39,347 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:39,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:39,347 INFO L225 Difference]: With dead ends: 34 [2018-10-02 11:54:39,347 INFO L226 Difference]: Without dead ends: 32 [2018-10-02 11:54:39,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:39,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-02 11:54:39,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-10-02 11:54:39,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 11:54:39,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-02 11:54:39,411 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-10-02 11:54:39,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:39,411 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-02 11:54:39,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:39,411 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-02 11:54:39,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:39,411 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:39,411 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-02 11:54:39,411 INFO L423 AbstractCegarLoop]: === Iteration 160 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:39,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:39,412 INFO L82 PathProgramCache]: Analyzing trace with hash -754962569, now seen corresponding path program 146 times [2018-10-02 11:54:39,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:39,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:39,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:39,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:39,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:39,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:39,540 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:39,549 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:39,555 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:39,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:39,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:39,560 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:39,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:39,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:39,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:39,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:39,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:39,592 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-10-02 11:54:39,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:39,871 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:54:39,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:39,871 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:39,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:39,872 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:54:39,872 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:54:39,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:39,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:54:39,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-02 11:54:39,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:39,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:39,998 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:39,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:39,998 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:39,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:39,998 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:39,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:39,998 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:39,998 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:54:39,999 INFO L423 AbstractCegarLoop]: === Iteration 161 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:39,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:39,999 INFO L82 PathProgramCache]: Analyzing trace with hash -754960647, now seen corresponding path program 147 times [2018-10-02 11:54:39,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:39,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:39,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:40,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:40,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:40,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:40,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:40,072 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:40,081 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-02 11:54:40,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:40,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:40,086 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:40,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:40,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:40,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:40,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:40,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:40,108 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:40,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:40,412 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:54:40,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:40,412 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:40,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:40,413 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:54:40,413 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:54:40,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:40,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:54:40,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-02 11:54:40,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:40,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:40,583 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-02 11:54:40,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:40,583 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:40,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:40,583 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:40,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:40,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:40,584 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:54:40,584 INFO L423 AbstractCegarLoop]: === Iteration 162 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:40,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:40,584 INFO L82 PathProgramCache]: Analyzing trace with hash -753115527, now seen corresponding path program 148 times [2018-10-02 11:54:40,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:40,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:40,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:40,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:40,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:40,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:40,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:40,666 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:40,672 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:40,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:40,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:40,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:40,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:40,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:40,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:40,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:40,697 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-02 11:54:40,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:40,970 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:54:40,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:40,970 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:40,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:40,971 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:54:40,971 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:54:40,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:40,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:54:41,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-02 11:54:41,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:41,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:41,084 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:41,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:41,085 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:41,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:41,085 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:41,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:41,085 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:41,085 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:41,085 INFO L423 AbstractCegarLoop]: === Iteration 163 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:41,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:41,085 INFO L82 PathProgramCache]: Analyzing trace with hash -753113605, now seen corresponding path program 149 times [2018-10-02 11:54:41,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:41,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:41,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:41,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:41,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:41,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:41,148 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:41,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:41,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:41,157 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:41,167 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-02 11:54:41,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:41,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:41,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:41,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:41,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:41,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:41,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:41,192 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:41,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:41,457 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:54:41,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:41,457 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:41,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:41,458 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:54:41,458 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:54:41,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:41,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:54:41,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-10-02 11:54:41,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:41,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:41,564 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-02 11:54:41,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:41,564 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:41,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:41,564 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:41,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:41,565 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:41,565 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:54:41,565 INFO L423 AbstractCegarLoop]: === Iteration 164 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:41,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:41,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1020044793, now seen corresponding path program 150 times [2018-10-02 11:54:41,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:41,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:41,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:41,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:41,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:41,697 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:41,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:41,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:41,705 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:41,714 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 11:54:41,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:41,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:41,743 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:41,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:41,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:41,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:41,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:41,743 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-02 11:54:41,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:41,995 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:54:41,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:41,995 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:41,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:41,995 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:54:41,995 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:54:41,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:41,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:54:42,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-02 11:54:42,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:42,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:42,118 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:42,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:42,118 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:42,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:42,118 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:42,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:42,118 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:42,119 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:42,119 INFO L423 AbstractCegarLoop]: === Iteration 165 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:42,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:42,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1020046715, now seen corresponding path program 151 times [2018-10-02 11:54:42,119 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:42,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:42,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:42,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:42,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:42,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:42,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:42,183 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:42,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:42,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:42,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:42,201 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:42,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:42,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:42,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:42,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:42,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:42,223 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:42,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:42,472 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:54:42,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:42,472 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:42,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:42,473 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:54:42,473 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:54:42,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:42,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:54:42,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-10-02 11:54:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:42,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:42,595 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-02 11:54:42,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:42,595 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:42,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:42,595 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:42,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:42,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:42,595 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:42,596 INFO L423 AbstractCegarLoop]: === Iteration 166 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:42,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:42,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1021891835, now seen corresponding path program 152 times [2018-10-02 11:54:42,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:42,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:42,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:42,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:42,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:42,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:42,656 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:42,664 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:42,669 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:42,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:42,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:42,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:42,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:42,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:42,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:42,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:42,692 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-02 11:54:42,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:42,947 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:54:42,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:42,947 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:42,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:42,948 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:54:42,948 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:54:42,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:42,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:54:43,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-02 11:54:43,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:43,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:43,076 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:43,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:43,076 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:43,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:43,076 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:43,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:43,077 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:43,077 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:43,077 INFO L423 AbstractCegarLoop]: === Iteration 167 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:43,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:43,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1021893757, now seen corresponding path program 153 times [2018-10-02 11:54:43,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:43,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:43,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:43,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:43,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:43,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:43,138 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:43,145 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:43,152 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-02 11:54:43,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:43,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:43,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:43,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:43,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:43,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:43,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:43,176 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:43,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:43,420 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-02 11:54:43,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:43,420 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:43,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:43,421 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:54:43,421 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:54:43,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:43,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:54:43,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-10-02 11:54:43,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:54:43,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:54:43,521 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-10-02 11:54:43,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:43,521 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:54:43,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:43,521 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:54:43,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:43,521 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:43,522 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:54:43,522 INFO L423 AbstractCegarLoop]: === Iteration 168 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:43,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:43,522 INFO L82 PathProgramCache]: Analyzing trace with hash -74904199, now seen corresponding path program 154 times [2018-10-02 11:54:43,522 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:43,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:43,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:43,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:43,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:43,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:43,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:43,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:43,591 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:43,618 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:43,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:43,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:43,622 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:43,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:43,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:43,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:43,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:43,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:43,645 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-10-02 11:54:43,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:43,956 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:54:43,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:43,956 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:43,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:43,957 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:54:43,957 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:54:43,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:43,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:54:44,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-02 11:54:44,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:44,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:44,076 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:44,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:44,077 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:44,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:44,077 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:44,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:44,077 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:44,077 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:44,077 INFO L423 AbstractCegarLoop]: === Iteration 169 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:44,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:44,078 INFO L82 PathProgramCache]: Analyzing trace with hash -74902277, now seen corresponding path program 155 times [2018-10-02 11:54:44,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:44,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:44,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:44,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:44,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:44,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:44,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:44,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:44,149 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:44,165 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-02 11:54:44,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:44,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:44,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:44,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:44,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:44,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:44,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:44,188 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:44,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:44,449 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:54:44,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:44,449 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:44,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:44,449 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:54:44,449 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:54:44,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:44,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:54:44,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-02 11:54:44,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:44,573 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-02 11:54:44,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:44,573 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:44,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:44,573 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:44,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:44,574 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:44,574 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:44,574 INFO L423 AbstractCegarLoop]: === Iteration 170 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:44,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:44,574 INFO L82 PathProgramCache]: Analyzing trace with hash -73057157, now seen corresponding path program 156 times [2018-10-02 11:54:44,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:44,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:44,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:44,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:44,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:44,725 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:44,725 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:44,733 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:44,743 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 11:54:44,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:44,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:44,767 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:44,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:44,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:44,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:44,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:44,768 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-02 11:54:45,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:45,045 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:54:45,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:45,045 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:45,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:45,046 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:54:45,046 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:54:45,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:45,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:54:45,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-02 11:54:45,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:45,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:45,166 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:45,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:45,166 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:45,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:45,167 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:45,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:45,167 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:45,167 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:45,167 INFO L423 AbstractCegarLoop]: === Iteration 171 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:45,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:45,167 INFO L82 PathProgramCache]: Analyzing trace with hash -73055235, now seen corresponding path program 157 times [2018-10-02 11:54:45,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:45,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:45,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:45,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:45,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:45,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:45,227 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:45,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:45,227 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:45,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:45,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:45,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:45,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:45,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:45,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:45,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:45,268 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:45,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:45,534 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:54:45,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:45,534 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:45,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:45,534 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:54:45,534 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:54:45,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:45,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:54:45,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-10-02 11:54:45,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:45,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:45,643 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-02 11:54:45,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:45,643 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:45,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:45,643 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:45,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:45,643 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:45,643 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:45,644 INFO L423 AbstractCegarLoop]: === Iteration 172 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:45,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:45,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1700103163, now seen corresponding path program 158 times [2018-10-02 11:54:45,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:45,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:45,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:45,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:45,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:45,708 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:45,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:45,709 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:45,718 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:45,724 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:45,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:45,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:45,728 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:45,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:45,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:45,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:45,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:45,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:45,748 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-02 11:54:46,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:46,009 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:54:46,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:46,009 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:46,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:46,010 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:54:46,010 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:54:46,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:46,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:54:46,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-02 11:54:46,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:46,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:46,136 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:46,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:46,137 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:46,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:46,137 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:46,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:46,137 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:46,137 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:46,137 INFO L423 AbstractCegarLoop]: === Iteration 173 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:46,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:46,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1700105085, now seen corresponding path program 159 times [2018-10-02 11:54:46,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:46,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:46,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:46,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:46,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:46,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:46,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:46,209 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:46,218 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-02 11:54:46,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:46,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:46,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:46,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:46,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:46,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:46,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:46,251 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:46,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:46,520 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:54:46,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:46,520 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:46,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:46,521 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:54:46,521 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:54:46,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:46,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:54:46,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-10-02 11:54:46,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:46,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:46,645 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-02 11:54:46,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:46,645 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:46,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:46,645 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:46,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:46,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:46,646 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:46,646 INFO L423 AbstractCegarLoop]: === Iteration 174 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:46,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:46,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1701950205, now seen corresponding path program 160 times [2018-10-02 11:54:46,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:46,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:46,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:46,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:46,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:46,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:46,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:46,716 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:46,722 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:46,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:46,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:46,728 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:46,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:46,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:46,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:46,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:46,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:46,748 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-02 11:54:46,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:46,997 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:54:46,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:46,997 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:46,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:46,998 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:54:46,998 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:54:46,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:46,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:54:47,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-02 11:54:47,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:47,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:47,125 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:47,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:47,126 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:47,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:47,126 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:47,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:47,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:47,126 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:54:47,126 INFO L423 AbstractCegarLoop]: === Iteration 175 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:47,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:47,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1701952127, now seen corresponding path program 161 times [2018-10-02 11:54:47,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:47,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:47,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:47,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:47,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:47,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:47,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:47,226 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:47,250 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-02 11:54:47,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:47,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:47,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:47,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:47,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:47,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:47,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:47,276 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:47,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:47,705 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-02 11:54:47,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:47,705 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:47,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:47,706 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:54:47,706 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:54:47,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:47,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:54:47,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-10-02 11:54:47,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:54:47,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-02 11:54:47,897 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-10-02 11:54:47,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:47,898 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-02 11:54:47,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:47,898 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-02 11:54:47,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:47,898 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:47,898 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:54:47,898 INFO L423 AbstractCegarLoop]: === Iteration 176 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:47,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:47,899 INFO L82 PathProgramCache]: Analyzing trace with hash -53897991, now seen corresponding path program 162 times [2018-10-02 11:54:47,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:47,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:47,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:47,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:47,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:48,824 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:48,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:48,824 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-02 11:54:48,840 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:48,935 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 11:54:48,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:48,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:48,939 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:48,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:48,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:48,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:48,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:48,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:48,970 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-10-02 11:54:49,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:49,278 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:54:49,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:49,278 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:49,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:49,279 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:54:49,279 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:54:49,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:49,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:54:49,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-02 11:54:49,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:49,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:49,427 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:49,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:49,428 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:49,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:49,428 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:49,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:49,428 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:49,428 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:49,428 INFO L423 AbstractCegarLoop]: === Iteration 177 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:49,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:49,428 INFO L82 PathProgramCache]: Analyzing trace with hash -53896069, now seen corresponding path program 163 times [2018-10-02 11:54:49,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:49,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:49,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:49,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:49,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:49,527 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:49,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:49,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:49,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:49,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:49,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:49,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:49,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:49,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:49,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:49,565 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:49,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:49,839 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:54:49,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:49,839 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:49,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:49,839 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:54:49,839 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:54:49,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:49,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:54:49,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-02 11:54:49,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:49,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:49,971 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-02 11:54:49,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:49,971 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:49,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:49,972 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:49,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:49,972 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:49,972 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:49,972 INFO L423 AbstractCegarLoop]: === Iteration 178 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:49,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:49,972 INFO L82 PathProgramCache]: Analyzing trace with hash -52050949, now seen corresponding path program 164 times [2018-10-02 11:54:49,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:49,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:49,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:49,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:49,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:49,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:50,056 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:50,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:50,057 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:50,064 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:50,070 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:50,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:50,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:50,094 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:50,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:50,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:50,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:50,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:50,095 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-02 11:54:50,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:50,351 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-02 11:54:50,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:50,351 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:50,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:50,352 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:54:50,352 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:54:50,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:50,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:54:50,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-02 11:54:50,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:50,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:50,476 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:50,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:50,476 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:50,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:50,476 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:50,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:50,476 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:50,476 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:50,477 INFO L423 AbstractCegarLoop]: === Iteration 179 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:50,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:50,477 INFO L82 PathProgramCache]: Analyzing trace with hash -52049027, now seen corresponding path program 165 times [2018-10-02 11:54:50,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:50,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:50,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:50,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:50,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:50,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:50,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:50,548 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:50,556 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-02 11:54:50,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:50,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:50,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:50,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:50,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:50,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:50,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:50,579 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:50,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:50,817 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:54:50,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:50,817 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:50,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:50,818 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:54:50,818 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:54:50,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:50,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:54:50,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-10-02 11:54:50,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:50,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:50,936 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-02 11:54:50,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:50,936 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:50,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:50,936 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:50,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:50,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:50,937 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:50,937 INFO L423 AbstractCegarLoop]: === Iteration 180 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:50,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:50,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1721109371, now seen corresponding path program 166 times [2018-10-02 11:54:50,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:50,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:50,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:50,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:50,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:50,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:50,997 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:51,004 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:51,012 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:51,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:51,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:51,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:51,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:51,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:51,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:51,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:51,035 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-02 11:54:51,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:51,301 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:54:51,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:51,301 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:51,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:51,302 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:54:51,302 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:54:51,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:51,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:54:51,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-02 11:54:51,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:51,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:51,438 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:51,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:51,438 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:51,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:51,439 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:51,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:51,439 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:51,439 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:51,439 INFO L423 AbstractCegarLoop]: === Iteration 181 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:51,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:51,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1721111293, now seen corresponding path program 167 times [2018-10-02 11:54:51,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:51,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:51,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:51,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:51,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:51,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:51,501 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:51,509 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:51,522 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-02 11:54:51,522 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:51,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:51,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:51,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:51,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:51,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:51,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:51,547 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:51,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:51,814 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:54:51,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:51,814 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:51,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:51,814 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:54:51,814 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:54:51,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:51,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:54:51,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-02 11:54:51,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:51,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:51,936 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-02 11:54:51,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:51,936 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:51,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:51,937 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:51,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:51,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:51,937 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:51,937 INFO L423 AbstractCegarLoop]: === Iteration 182 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:51,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:51,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1722956413, now seen corresponding path program 168 times [2018-10-02 11:54:51,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:51,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:51,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:51,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:51,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:51,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:51,996 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:51,997 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:52,005 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:52,013 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 11:54:52,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:52,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:52,037 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:52,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:52,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:52,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:52,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:52,038 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-02 11:54:52,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:52,291 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-02 11:54:52,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:52,291 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:52,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:52,292 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:54:52,292 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:54:52,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:52,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:54:52,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-02 11:54:52,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:52,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:52,430 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:52,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:52,430 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:52,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:52,430 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:52,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:52,430 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:52,431 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:54:52,431 INFO L423 AbstractCegarLoop]: === Iteration 183 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:52,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:52,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1722958335, now seen corresponding path program 169 times [2018-10-02 11:54:52,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:52,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:52,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:52,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:52,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:52,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:52,499 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:52,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:52,499 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:52,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:52,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:52,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:52,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:52,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:52,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:52,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:52,536 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:52,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:52,775 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:54:52,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:52,775 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:52,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:52,776 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:54:52,776 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:54:52,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:52,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:54:52,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-10-02 11:54:52,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:54:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:54:52,882 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-10-02 11:54:52,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:52,882 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:54:52,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:52,882 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:54:52,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:52,883 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:52,883 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:52,883 INFO L423 AbstractCegarLoop]: === Iteration 184 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:52,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:52,883 INFO L82 PathProgramCache]: Analyzing trace with hash 626160379, now seen corresponding path program 170 times [2018-10-02 11:54:52,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:52,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:52,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:52,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:52,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:52,943 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:52,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:52,944 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:52,952 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:52,958 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:52,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:52,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:52,982 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:52,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:52,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:52,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:52,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:52,983 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-10-02 11:54:53,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:53,228 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:54:53,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:53,228 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:53,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:53,229 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:54:53,229 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:54:53,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:53,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:54:53,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-10-02 11:54:53,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:53,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:53,369 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:53,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:53,369 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:53,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:53,369 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:53,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:53,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:53,370 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:53,370 INFO L423 AbstractCegarLoop]: === Iteration 185 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:53,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:53,370 INFO L82 PathProgramCache]: Analyzing trace with hash 626162301, now seen corresponding path program 171 times [2018-10-02 11:54:53,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:53,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:53,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:53,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:53,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:53,431 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:53,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:53,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:53,438 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:53,447 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-02 11:54:53,447 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:53,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:53,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:53,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:53,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:53,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:53,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:53,471 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:53,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:53,698 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-02 11:54:53,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:53,698 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:53,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:53,699 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:54:53,699 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:54:53,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:53,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:54:53,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-10-02 11:54:53,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:53,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:53,831 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-02 11:54:53,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:53,831 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:53,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:53,831 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:53,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:53,832 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:53,832 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:53,832 INFO L423 AbstractCegarLoop]: === Iteration 186 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:53,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:53,832 INFO L82 PathProgramCache]: Analyzing trace with hash 628007421, now seen corresponding path program 172 times [2018-10-02 11:54:53,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:53,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:53,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:53,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:53,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:53,893 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:53,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:53,893 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:53,900 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:53,906 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:53,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:53,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:53,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:53,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:53,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:53,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:53,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:53,930 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-02 11:54:54,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:54,170 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:54:54,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:54,170 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:54,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:54,171 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:54:54,171 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:54:54,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:54,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:54:54,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-10-02 11:54:54,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:54,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:54,304 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:54,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:54,304 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:54,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:54,304 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:54,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:54,304 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:54,304 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:54:54,304 INFO L423 AbstractCegarLoop]: === Iteration 187 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:54,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:54,305 INFO L82 PathProgramCache]: Analyzing trace with hash 628009343, now seen corresponding path program 173 times [2018-10-02 11:54:54,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:54,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:54,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:54,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:54,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:54,637 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:54,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:54,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:54,644 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:54,656 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-02 11:54:54,656 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:54,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:54,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:54,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:54,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:54,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:54,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:54,683 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:54,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:54,884 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-02 11:54:54,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:54,884 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:54,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:54,884 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:54:54,884 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:54:54,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:54,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:54:55,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-10-02 11:54:55,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:55,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:54:55,009 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-02 11:54:55,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:55,009 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:54:55,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:55,010 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:54:55,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:55,010 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:55,010 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:55,010 INFO L423 AbstractCegarLoop]: === Iteration 188 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:55,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:55,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1893799555, now seen corresponding path program 174 times [2018-10-02 11:54:55,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:55,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:55,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:55,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:55,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:55,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:55,105 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:55,112 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:55,141 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 11:54:55,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:55,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:55,145 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:55,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:55,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:55,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:55,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:55,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:55,166 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-02 11:54:55,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:55,404 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-02 11:54:55,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:55,404 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:55,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:55,405 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:54:55,405 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:54:55,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:55,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:54:55,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-10-02 11:54:55,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:55,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:55,545 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:55,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:55,545 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:55,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:55,545 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:55,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:55,545 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:55,545 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:54:55,545 INFO L423 AbstractCegarLoop]: === Iteration 189 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:55,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:55,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1893797633, now seen corresponding path program 175 times [2018-10-02 11:54:55,546 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:55,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:55,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:55,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:55,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:55,610 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:55,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:55,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:55,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:55,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:55,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:55,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:55,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:55,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:55,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:55,653 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:55,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:55,868 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-02 11:54:55,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:55,868 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:55,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:55,869 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:54:55,869 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:54:55,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:55,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:54:56,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-10-02 11:54:56,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:56,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:56,005 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-02 11:54:56,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:56,006 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:56,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:56,006 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:56,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:56,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:56,006 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:54:56,006 INFO L423 AbstractCegarLoop]: === Iteration 190 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:56,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:56,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1891952513, now seen corresponding path program 176 times [2018-10-02 11:54:56,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:56,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:56,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:56,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:56,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:56,066 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:56,066 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:56,073 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:56,079 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:56,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:56,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:56,103 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:56,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:56,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:56,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:56,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:56,104 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-02 11:54:56,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:56,316 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-02 11:54:56,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:56,316 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:56,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:56,317 INFO L225 Difference]: With dead ends: 35 [2018-10-02 11:54:56,317 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 11:54:56,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:56,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 11:54:56,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-10-02 11:54:56,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:56,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:56,446 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:56,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:56,446 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:56,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:56,446 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:56,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:56,446 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:56,446 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-02 11:54:56,446 INFO L423 AbstractCegarLoop]: === Iteration 191 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:56,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:56,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1891950591, now seen corresponding path program 177 times [2018-10-02 11:54:56,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:56,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:56,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:56,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:56,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:56,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:56,521 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:56,528 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:56,535 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-02 11:54:56,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:56,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:56,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:56,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:56,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:56,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:56,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:56,561 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:56,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:56,759 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-10-02 11:54:56,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:56,759 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:56,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:56,760 INFO L225 Difference]: With dead ends: 34 [2018-10-02 11:54:56,760 INFO L226 Difference]: Without dead ends: 32 [2018-10-02 11:54:56,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:56,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-02 11:54:56,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-10-02 11:54:56,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 11:54:56,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-02 11:54:56,847 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-10-02 11:54:56,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:56,848 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-02 11:54:56,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:56,848 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-02 11:54:56,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:56,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:56,848 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-02 11:54:56,848 INFO L423 AbstractCegarLoop]: === Iteration 192 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:56,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:56,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1448020233, now seen corresponding path program 178 times [2018-10-02 11:54:56,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:56,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:56,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:56,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:56,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:57,276 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:57,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:57,276 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:57,292 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:57,300 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:57,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:57,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:57,304 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:57,326 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:57,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:57,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:57,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:57,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:57,327 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-10-02 11:54:57,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:57,700 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-02 11:54:57,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:57,700 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:57,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:57,700 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:54:57,700 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:54:57,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:57,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:54:57,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-10-02 11:54:57,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:54:57,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:54:57,864 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:54:57,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:57,864 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:54:57,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:57,864 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:54:57,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:57,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:57,864 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:54:57,865 INFO L423 AbstractCegarLoop]: === Iteration 193 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:57,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:57,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1448018311, now seen corresponding path program 179 times [2018-10-02 11:54:57,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:57,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:57,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:57,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:57,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:57,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:57,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:57,952 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:57,961 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-02 11:54:57,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:57,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:57,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:57,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:57,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:57,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:57,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:57,986 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:54:58,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:58,365 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-02 11:54:58,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:58,365 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:58,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:58,366 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:54:58,366 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:54:58,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:58,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:54:58,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-10-02 11:54:58,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:58,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:54:58,520 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:54:58,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:58,520 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:54:58,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:58,520 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:54:58,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:58,520 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:58,520 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:54:58,521 INFO L423 AbstractCegarLoop]: === Iteration 194 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:58,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:58,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1446173191, now seen corresponding path program 180 times [2018-10-02 11:54:58,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:58,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:58,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:58,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:58,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:58,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:58,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:58,589 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:58,598 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 11:54:58,599 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:58,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:58,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:58,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:58,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:58,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:58,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:58,630 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:54:59,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:59,009 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-02 11:54:59,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:59,009 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:59,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:59,009 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:54:59,009 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:54:59,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:59,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:54:59,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-10-02 11:54:59,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:54:59,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:54:59,205 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:54:59,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:59,206 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:54:59,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:59,206 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:54:59,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:59,206 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:59,206 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:54:59,206 INFO L423 AbstractCegarLoop]: === Iteration 195 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:59,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:59,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1446171269, now seen corresponding path program 181 times [2018-10-02 11:54:59,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:59,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:59,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:59,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:59,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:59,288 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:59,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:59,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:59,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:59,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:59,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:59,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:59,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:59,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:59,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:59,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:59,325 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:54:59,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:59,698 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-02 11:54:59,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:59,701 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:54:59,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:59,703 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:54:59,703 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:54:59,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:59,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:54:59,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-10-02 11:54:59,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:59,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:54:59,859 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-02 11:54:59,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:59,859 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:54:59,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:59,859 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:54:59,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:59,859 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:59,860 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:54:59,860 INFO L423 AbstractCegarLoop]: === Iteration 196 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:59,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:59,860 INFO L82 PathProgramCache]: Analyzing trace with hash 326987129, now seen corresponding path program 182 times [2018-10-02 11:54:59,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:59,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:59,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:59,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:59,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:00,007 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:00,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:00,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:00,014 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:00,019 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:00,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:00,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:00,042 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:00,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:00,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:00,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:00,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:00,043 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-02 11:55:00,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:00,419 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-02 11:55:00,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:00,419 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:00,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:00,420 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:55:00,420 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:55:00,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:00,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:55:00,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-10-02 11:55:00,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:00,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:00,591 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:00,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:00,591 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:00,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:00,591 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:00,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:00,591 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:00,591 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:00,592 INFO L423 AbstractCegarLoop]: === Iteration 197 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:00,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:00,592 INFO L82 PathProgramCache]: Analyzing trace with hash 326989051, now seen corresponding path program 183 times [2018-10-02 11:55:00,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:00,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:00,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:00,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:00,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:00,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:00,652 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:00,660 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:00,669 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-02 11:55:00,670 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:00,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:00,673 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:00,692 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:00,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:00,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:00,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:00,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:00,693 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:01,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:01,089 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-02 11:55:01,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:01,089 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:01,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:01,090 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:55:01,090 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:55:01,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:01,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:55:01,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-10-02 11:55:01,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:55:01,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:55:01,240 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:55:01,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:01,241 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:55:01,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:01,241 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:55:01,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:01,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:01,241 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:01,241 INFO L423 AbstractCegarLoop]: === Iteration 198 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:01,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:01,241 INFO L82 PathProgramCache]: Analyzing trace with hash 328834171, now seen corresponding path program 184 times [2018-10-02 11:55:01,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:01,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:01,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:01,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:01,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:01,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:01,301 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:01,308 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:01,314 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:01,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:01,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:01,337 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:01,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:01,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:01,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:01,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:01,337 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:55:01,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:01,717 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-02 11:55:01,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:01,717 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:01,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:01,718 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:55:01,718 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:55:01,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:01,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:55:01,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-10-02 11:55:01,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:01,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:01,893 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:01,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:01,893 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:01,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:01,893 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:01,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:01,893 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:01,893 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:01,893 INFO L423 AbstractCegarLoop]: === Iteration 199 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:01,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:01,894 INFO L82 PathProgramCache]: Analyzing trace with hash 328836093, now seen corresponding path program 185 times [2018-10-02 11:55:01,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:01,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:01,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:01,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:01,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:02,039 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:02,040 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:02,040 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:02,047 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:02,056 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-02 11:55:02,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:02,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:02,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:02,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:02,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:02,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:02,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:02,081 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:02,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:02,445 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-02 11:55:02,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:02,445 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:02,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:02,446 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:55:02,446 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:55:02,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:02,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:55:02,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-10-02 11:55:02,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:55:02,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:55:02,587 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-02 11:55:02,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:02,587 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:55:02,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:02,587 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:55:02,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:02,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:02,587 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:55:02,587 INFO L423 AbstractCegarLoop]: === Iteration 200 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:02,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:02,587 INFO L82 PathProgramCache]: Analyzing trace with hash -767961863, now seen corresponding path program 186 times [2018-10-02 11:55:02,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:02,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:02,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:02,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:02,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:02,648 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:02,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:02,649 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:02,657 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:02,665 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 11:55:02,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:02,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:02,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:02,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:02,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:02,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:02,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:02,690 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-02 11:55:03,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:03,051 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-02 11:55:03,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:03,051 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:03,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:03,052 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:55:03,052 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:55:03,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:03,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:55:03,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-02 11:55:03,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:03,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:03,223 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:03,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:03,223 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:03,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:03,223 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:03,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:03,223 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:03,223 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:03,223 INFO L423 AbstractCegarLoop]: === Iteration 201 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:03,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:03,224 INFO L82 PathProgramCache]: Analyzing trace with hash -767959941, now seen corresponding path program 187 times [2018-10-02 11:55:03,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:03,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:03,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:03,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:03,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:03,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:03,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:03,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:03,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:03,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:03,300 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:03,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:03,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:03,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:03,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:03,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:03,330 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:03,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:03,753 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-02 11:55:03,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:03,753 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:03,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:03,754 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:55:03,754 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:55:03,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:03,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:55:03,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-02 11:55:03,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:55:03,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:55:03,923 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:55:03,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:03,923 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:55:03,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:03,923 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:55:03,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:03,923 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:03,923 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:03,923 INFO L423 AbstractCegarLoop]: === Iteration 202 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:03,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:03,924 INFO L82 PathProgramCache]: Analyzing trace with hash -766114821, now seen corresponding path program 188 times [2018-10-02 11:55:03,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:03,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:03,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:03,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:03,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:03,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:03,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:03,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:03,993 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:04,000 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:04,000 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:04,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:04,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:04,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:04,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:04,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:04,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:04,024 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:55:04,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:04,512 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-02 11:55:04,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:04,513 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:04,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:04,513 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:55:04,513 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:55:04,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:04,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:55:04,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-02 11:55:04,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:04,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:04,684 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:04,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:04,684 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:04,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:04,684 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:04,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:04,684 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:04,684 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:04,684 INFO L423 AbstractCegarLoop]: === Iteration 203 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:04,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:04,685 INFO L82 PathProgramCache]: Analyzing trace with hash -766112899, now seen corresponding path program 189 times [2018-10-02 11:55:04,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:04,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:04,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:04,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:04,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:04,755 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:04,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:04,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:04,764 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:04,775 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-02 11:55:04,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:04,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:04,779 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:04,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:04,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:04,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:04,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:04,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:04,799 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:05,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:05,131 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-02 11:55:05,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:05,131 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:05,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:05,131 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:55:05,131 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:55:05,131 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:05,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:55:05,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-10-02 11:55:05,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:55:05,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:55:05,291 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-02 11:55:05,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:05,292 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:55:05,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:05,292 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:55:05,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:05,292 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:05,292 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:05,292 INFO L423 AbstractCegarLoop]: === Iteration 204 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:05,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:05,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1007045499, now seen corresponding path program 190 times [2018-10-02 11:55:05,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:05,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:05,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:05,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:05,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:05,370 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:05,371 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:05,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:05,378 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:05,383 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:05,383 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:05,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:05,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:05,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:05,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:05,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:05,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:05,417 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-02 11:55:05,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:05,889 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:55:05,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:05,889 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:05,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:05,890 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:55:05,890 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:55:05,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:05,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:55:06,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-02 11:55:06,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:06,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:06,067 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:06,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:06,067 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:06,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:06,067 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:06,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:06,068 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:06,068 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:06,068 INFO L423 AbstractCegarLoop]: === Iteration 205 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:06,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:06,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1007047421, now seen corresponding path program 191 times [2018-10-02 11:55:06,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:06,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:06,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:06,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:06,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:06,130 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:06,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:06,138 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:06,146 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-02 11:55:06,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:06,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:06,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:06,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:06,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:06,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:06,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:06,171 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:06,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:06,535 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:55:06,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:06,535 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:06,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:06,536 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:55:06,536 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:55:06,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:06,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:55:06,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-02 11:55:06,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:55:06,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:55:06,702 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:55:06,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:06,702 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:55:06,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:06,703 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:55:06,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:06,703 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:06,703 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:06,703 INFO L423 AbstractCegarLoop]: === Iteration 206 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:06,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:06,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1008892541, now seen corresponding path program 192 times [2018-10-02 11:55:06,703 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:06,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:06,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:06,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:06,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:06,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:06,819 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:06,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:06,819 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:06,827 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:06,842 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 11:55:06,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:06,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:06,847 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:06,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:06,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:06,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:06,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:06,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:06,867 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:55:07,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:07,193 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:55:07,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:07,193 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:07,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:07,194 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:55:07,194 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:55:07,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:07,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:55:07,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-02 11:55:07,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:07,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:07,375 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:07,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:07,375 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:07,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:07,375 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:07,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:07,375 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:07,375 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:55:07,375 INFO L423 AbstractCegarLoop]: === Iteration 207 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:07,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:07,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1008894463, now seen corresponding path program 193 times [2018-10-02 11:55:07,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:07,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:07,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:07,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:07,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:07,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:07,438 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:07,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:07,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:07,452 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:07,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:07,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:07,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:07,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:07,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:07,473 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:07,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:07,782 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:55:07,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:07,782 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:07,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:07,783 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:55:07,783 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:55:07,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:07,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:55:07,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-10-02 11:55:07,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:55:07,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:55:07,915 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-10-02 11:55:07,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:07,915 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:55:07,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:07,915 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:55:07,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:07,915 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:07,915 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:55:07,915 INFO L423 AbstractCegarLoop]: === Iteration 208 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:07,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:07,916 INFO L82 PathProgramCache]: Analyzing trace with hash -746955655, now seen corresponding path program 194 times [2018-10-02 11:55:07,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:07,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:07,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:07,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:07,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:07,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:07,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:07,986 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:07,992 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:07,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:07,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:07,995 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:08,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:08,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:08,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:08,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:08,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:08,014 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-10-02 11:55:08,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:08,432 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-02 11:55:08,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:08,432 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:08,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:08,433 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:55:08,433 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:55:08,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:08,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:55:08,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-10-02 11:55:08,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:08,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:08,614 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:08,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:08,614 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:08,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:08,615 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:08,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:08,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:08,615 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:08,615 INFO L423 AbstractCegarLoop]: === Iteration 209 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:08,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:08,615 INFO L82 PathProgramCache]: Analyzing trace with hash -746953733, now seen corresponding path program 195 times [2018-10-02 11:55:08,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:08,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:08,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:08,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:08,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:08,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:08,682 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:08,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:08,682 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:08,690 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:08,699 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-02 11:55:08,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:08,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:08,703 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:08,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:08,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:08,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:08,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:08,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:08,722 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:09,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:09,176 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-02 11:55:09,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:09,176 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:09,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:09,177 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:55:09,177 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:55:09,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:09,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:55:09,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-10-02 11:55:09,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:55:09,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:55:09,342 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:55:09,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:09,342 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:55:09,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:09,342 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:55:09,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:09,343 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:09,343 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:09,343 INFO L423 AbstractCegarLoop]: === Iteration 210 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:09,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:09,343 INFO L82 PathProgramCache]: Analyzing trace with hash -745108613, now seen corresponding path program 196 times [2018-10-02 11:55:09,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:09,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:09,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:09,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:09,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:09,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:09,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:09,411 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:09,419 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:09,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:09,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:09,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:09,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:09,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:09,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:09,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:09,444 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:55:09,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:09,848 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-02 11:55:09,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:09,848 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:09,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:09,849 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:55:09,849 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:55:09,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:09,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:55:10,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-10-02 11:55:10,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:10,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:10,033 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:10,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:10,033 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:10,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:10,033 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:10,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:10,033 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:10,033 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:10,033 INFO L423 AbstractCegarLoop]: === Iteration 211 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:10,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:10,033 INFO L82 PathProgramCache]: Analyzing trace with hash -745106691, now seen corresponding path program 197 times [2018-10-02 11:55:10,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:10,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:10,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:10,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:10,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:10,186 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:10,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:10,186 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:10,193 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:10,205 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-02 11:55:10,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:10,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:10,208 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:10,228 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:10,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:10,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:10,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:10,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:10,229 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:10,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:10,601 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-02 11:55:10,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:10,601 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:10,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:10,602 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:55:10,602 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:55:10,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:10,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:55:10,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-10-02 11:55:10,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:55:10,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:55:10,765 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-02 11:55:10,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:10,765 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:55:10,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:10,765 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:55:10,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:10,766 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:10,766 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:10,766 INFO L423 AbstractCegarLoop]: === Iteration 212 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:10,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:10,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1028051707, now seen corresponding path program 198 times [2018-10-02 11:55:10,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:10,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:10,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:10,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:10,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:10,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:10,826 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:10,837 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:10,847 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 11:55:10,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:10,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:10,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:10,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:10,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:10,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:10,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:10,872 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-02 11:55:11,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:11,294 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-02 11:55:11,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:11,294 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:11,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:11,295 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:55:11,295 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:55:11,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:11,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:55:11,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-10-02 11:55:11,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:11,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:11,490 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:11,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:11,490 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:11,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:11,490 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:11,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:11,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:11,491 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:11,491 INFO L423 AbstractCegarLoop]: === Iteration 213 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:11,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:11,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1028053629, now seen corresponding path program 199 times [2018-10-02 11:55:11,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:11,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:11,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:11,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:11,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:11,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:11,553 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:11,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:11,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:11,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:11,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:11,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:11,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:11,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:11,596 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:12,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:12,039 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-02 11:55:12,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:12,039 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:12,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:12,040 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:55:12,040 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:55:12,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:12,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:55:12,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-10-02 11:55:12,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:55:12,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:55:12,214 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:55:12,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:12,214 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:55:12,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:12,214 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:55:12,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:12,214 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:12,214 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:12,214 INFO L423 AbstractCegarLoop]: === Iteration 214 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:12,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:12,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1029898749, now seen corresponding path program 200 times [2018-10-02 11:55:12,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:12,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:12,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:12,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:12,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:12,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:12,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:12,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:12,293 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:12,300 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:12,300 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:12,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:12,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:12,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:12,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:12,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:12,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:12,324 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:55:12,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:12,726 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-02 11:55:12,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:12,726 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:12,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:12,727 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:55:12,727 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:55:12,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:12,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:55:12,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-10-02 11:55:12,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:12,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:12,919 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:12,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:12,919 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:12,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:12,919 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:12,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:12,920 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:12,920 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:55:12,920 INFO L423 AbstractCegarLoop]: === Iteration 215 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:12,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:12,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1029900671, now seen corresponding path program 201 times [2018-10-02 11:55:12,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:12,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:12,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:12,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:12,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:12,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:12,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:12,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:12,990 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:12,998 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-02 11:55:12,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:12,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:13,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:13,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:13,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:13,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:13,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:13,022 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:13,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:13,399 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-02 11:55:13,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:13,399 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:13,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:13,400 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:55:13,400 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:55:13,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:13,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:55:13,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-10-02 11:55:13,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:55:13,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:55:13,556 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-02 11:55:13,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:13,556 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:55:13,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:13,557 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:55:13,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:13,557 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:13,557 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:13,557 INFO L423 AbstractCegarLoop]: === Iteration 216 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:13,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:13,557 INFO L82 PathProgramCache]: Analyzing trace with hash -66897285, now seen corresponding path program 202 times [2018-10-02 11:55:13,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:13,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:13,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:13,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:13,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:13,623 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:13,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:13,634 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:13,640 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:13,640 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:13,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:13,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:13,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:13,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:13,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:13,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:13,665 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-02 11:55:14,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:14,055 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-02 11:55:14,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:14,055 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:14,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:14,056 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:55:14,056 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:55:14,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:14,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:55:14,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-02 11:55:14,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:14,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:14,234 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:14,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:14,235 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:14,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:14,235 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:14,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:14,235 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:14,235 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:14,235 INFO L423 AbstractCegarLoop]: === Iteration 217 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:14,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:14,235 INFO L82 PathProgramCache]: Analyzing trace with hash -66895363, now seen corresponding path program 203 times [2018-10-02 11:55:14,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:14,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:14,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:14,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:14,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:14,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:14,300 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:14,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:14,300 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:14,308 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:14,317 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-02 11:55:14,317 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:14,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:14,340 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:14,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:14,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:14,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:14,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:14,340 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:14,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:14,719 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-02 11:55:14,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:14,719 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:14,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:14,719 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:55:14,719 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:55:14,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:14,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:55:14,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-02 11:55:14,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:55:14,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:55:14,899 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:55:14,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:14,899 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:55:14,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:14,899 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:55:14,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:14,899 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:14,899 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:14,899 INFO L423 AbstractCegarLoop]: === Iteration 218 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:14,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:14,899 INFO L82 PathProgramCache]: Analyzing trace with hash -65050243, now seen corresponding path program 204 times [2018-10-02 11:55:14,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:14,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:14,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:14,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:14,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:15,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:15,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:15,250 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:15,258 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 11:55:15,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:15,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:15,282 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:15,282 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:15,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:15,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:15,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:15,283 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:55:15,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:15,670 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-02 11:55:15,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:15,670 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:15,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:15,670 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:55:15,670 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:55:15,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:15,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:55:15,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-02 11:55:15,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:15,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:15,855 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:15,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:15,855 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:15,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:15,855 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:15,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:15,856 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:15,856 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:55:15,856 INFO L423 AbstractCegarLoop]: === Iteration 219 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:15,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:15,856 INFO L82 PathProgramCache]: Analyzing trace with hash -65048321, now seen corresponding path program 205 times [2018-10-02 11:55:15,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:15,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:15,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:15,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:15,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:15,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:15,944 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:15,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:15,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:15,960 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:15,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:15,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:15,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:15,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:15,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:15,981 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:16,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:16,370 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-02 11:55:16,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:16,370 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:16,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:16,371 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:55:16,371 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:55:16,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:16,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:55:16,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-10-02 11:55:16,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:55:16,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:55:16,535 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-02 11:55:16,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:16,536 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:55:16,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:16,536 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:55:16,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:16,536 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:16,536 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:16,536 INFO L423 AbstractCegarLoop]: === Iteration 220 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:16,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:16,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1708110077, now seen corresponding path program 206 times [2018-10-02 11:55:16,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:16,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:16,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:16,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:16,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:16,616 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:16,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:16,616 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:16,623 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:16,628 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:16,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:16,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:16,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:16,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:16,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:16,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:16,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:16,652 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-02 11:55:17,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:17,022 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:55:17,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:17,022 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:17,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:17,022 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:55:17,022 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:55:17,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:17,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:55:17,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-02 11:55:17,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:17,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:17,210 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:17,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:17,210 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:17,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:17,210 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:17,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:17,210 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:17,210 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:55:17,210 INFO L423 AbstractCegarLoop]: === Iteration 221 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:17,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:17,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1708111999, now seen corresponding path program 207 times [2018-10-02 11:55:17,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:17,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:17,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:17,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:17,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:17,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:17,299 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:17,307 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:17,315 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-02 11:55:17,315 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:17,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:17,339 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:17,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:17,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:17,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:17,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:17,339 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:17,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:17,720 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:55:17,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:17,720 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:17,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:17,721 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:55:17,721 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:55:17,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:17,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:55:17,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-02 11:55:17,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:55:17,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:55:17,901 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:55:17,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:17,901 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:55:17,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:17,901 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:55:17,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:17,902 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:17,902 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:55:17,902 INFO L423 AbstractCegarLoop]: === Iteration 222 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:17,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:17,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1709957119, now seen corresponding path program 208 times [2018-10-02 11:55:17,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:17,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:17,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:17,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:17,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:17,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:17,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:17,972 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:17,977 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:17,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:17,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:18,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:18,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:18,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:18,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:18,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:18,000 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:55:18,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:18,345 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:55:18,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:18,345 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:18,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:18,346 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:55:18,346 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:55:18,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:18,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:55:18,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-02 11:55:18,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:18,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:18,524 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:18,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:18,524 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:18,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:18,525 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:18,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:18,525 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:18,525 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-02 11:55:18,525 INFO L423 AbstractCegarLoop]: === Iteration 223 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:18,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:18,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1709959041, now seen corresponding path program 209 times [2018-10-02 11:55:18,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:18,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:18,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:18,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:18,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:18,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:18,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:18,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:18,612 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:18,622 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-02 11:55:18,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:18,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:18,626 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:18,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:18,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:18,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:18,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:18,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:18,646 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:18,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:18,985 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:55:18,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:18,985 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:18,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:18,986 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:55:18,986 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:55:18,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:18,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:55:19,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 22. [2018-10-02 11:55:19,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:55:19,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-02 11:55:19,119 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-10-02 11:55:19,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:19,119 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-02 11:55:19,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:19,119 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-02 11:55:19,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:19,119 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:19,120 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:55:19,120 INFO L423 AbstractCegarLoop]: === Iteration 224 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:19,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:19,120 INFO L82 PathProgramCache]: Analyzing trace with hash -2034826247, now seen corresponding path program 210 times [2018-10-02 11:55:19,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:19,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:19,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:19,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:19,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:19,184 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:19,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:19,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:19,193 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:19,201 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 11:55:19,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:19,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:19,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:19,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:19,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:19,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:19,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:19,226 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-10-02 11:55:19,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:19,626 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-02 11:55:19,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:19,626 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:19,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:19,627 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:55:19,627 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:55:19,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:19,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:55:19,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-02 11:55:19,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:19,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:19,829 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:19,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:19,829 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:19,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:19,830 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:19,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:19,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:19,830 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:19,830 INFO L423 AbstractCegarLoop]: === Iteration 225 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:19,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:19,831 INFO L82 PathProgramCache]: Analyzing trace with hash -2034824325, now seen corresponding path program 211 times [2018-10-02 11:55:19,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:19,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:19,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:19,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:19,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:19,900 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:19,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:19,900 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:19,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:19,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:19,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:19,936 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:19,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:19,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:19,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:19,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:19,937 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:20,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:20,330 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:55:20,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:20,330 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:20,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:20,330 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:55:20,330 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:55:20,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:20,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:55:20,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-02 11:55:20,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:55:20,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:55:20,538 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:55:20,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:20,538 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:55:20,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:20,538 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:55:20,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:20,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:20,539 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:20,539 INFO L423 AbstractCegarLoop]: === Iteration 226 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:20,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:20,539 INFO L82 PathProgramCache]: Analyzing trace with hash -2032979205, now seen corresponding path program 212 times [2018-10-02 11:55:20,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:20,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:20,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:20,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:20,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:20,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:20,622 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:20,630 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:20,637 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:20,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:20,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:20,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:20,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:20,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:20,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:20,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:20,661 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:55:21,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:21,065 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-02 11:55:21,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:21,065 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:21,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:21,066 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:55:21,066 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:55:21,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:21,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:55:21,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-02 11:55:21,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:21,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:21,283 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:21,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:21,283 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:21,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:21,283 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:21,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:21,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:21,283 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:21,283 INFO L423 AbstractCegarLoop]: === Iteration 227 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:21,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:21,284 INFO L82 PathProgramCache]: Analyzing trace with hash -2032977283, now seen corresponding path program 213 times [2018-10-02 11:55:21,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:21,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:21,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:21,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:21,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:21,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:21,354 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:21,362 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:21,373 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-02 11:55:21,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:21,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:21,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:21,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:21,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:21,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:21,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:21,405 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:21,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:21,812 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:55:21,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:21,813 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:21,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:21,814 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:55:21,814 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:55:21,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:21,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:55:21,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-10-02 11:55:21,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:55:21,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:55:21,989 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-02 11:55:21,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:21,989 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:55:21,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:21,990 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:55:21,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:21,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:21,990 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:21,990 INFO L423 AbstractCegarLoop]: === Iteration 228 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:21,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:21,990 INFO L82 PathProgramCache]: Analyzing trace with hash -259818885, now seen corresponding path program 214 times [2018-10-02 11:55:21,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:21,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:21,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:21,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:21,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:21,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:22,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:22,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:22,062 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:22,067 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:22,068 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:22,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:22,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:22,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:22,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:22,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:22,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:22,102 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-02 11:55:22,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:22,508 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:55:22,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:22,508 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:22,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:22,508 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:55:22,508 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:55:22,509 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:22,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:55:22,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-02 11:55:22,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:22,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:22,725 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:22,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:22,726 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:22,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:22,726 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:22,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:22,726 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:22,726 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:22,726 INFO L423 AbstractCegarLoop]: === Iteration 229 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:22,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:22,726 INFO L82 PathProgramCache]: Analyzing trace with hash -259816963, now seen corresponding path program 215 times [2018-10-02 11:55:22,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:22,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:22,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:22,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:22,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:22,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:22,787 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:22,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:22,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:22,796 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:22,806 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-02 11:55:22,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:22,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:22,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:22,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:22,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:22,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:22,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:22,830 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:23,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:23,205 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:55:23,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:23,205 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:23,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:23,205 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:55:23,205 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:55:23,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:23,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:55:23,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-10-02 11:55:23,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:55:23,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:55:23,403 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:55:23,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:23,403 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:55:23,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:23,403 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:55:23,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:23,403 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:23,403 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:23,404 INFO L423 AbstractCegarLoop]: === Iteration 230 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:23,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:23,404 INFO L82 PathProgramCache]: Analyzing trace with hash -257971843, now seen corresponding path program 216 times [2018-10-02 11:55:23,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:23,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:23,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:23,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:23,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:23,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:23,466 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:23,474 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:23,483 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 11:55:23,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:23,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:23,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:23,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:23,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:23,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:23,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:23,507 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:55:23,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:23,877 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:55:23,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:23,877 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:23,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:23,877 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:55:23,878 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:55:23,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:23,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:55:24,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-10-02 11:55:24,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:24,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:24,080 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:24,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:24,080 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:24,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:24,080 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:24,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:24,080 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:24,080 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:55:24,081 INFO L423 AbstractCegarLoop]: === Iteration 231 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:24,081 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:24,081 INFO L82 PathProgramCache]: Analyzing trace with hash -257969921, now seen corresponding path program 217 times [2018-10-02 11:55:24,081 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:24,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:24,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:24,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:24,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:24,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:24,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:24,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:24,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:24,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:24,169 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:24,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:24,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:24,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:24,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:24,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:24,190 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:24,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:24,527 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:55:24,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:24,527 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:24,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:24,528 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:55:24,528 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:55:24,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:24,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:55:24,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-10-02 11:55:24,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:55:24,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:55:24,700 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-02 11:55:24,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:24,700 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:55:24,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:24,700 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:55:24,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:24,700 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:24,700 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:24,701 INFO L423 AbstractCegarLoop]: === Iteration 232 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:24,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:24,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1354767877, now seen corresponding path program 218 times [2018-10-02 11:55:24,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:24,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:24,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:24,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:24,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:24,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:24,762 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:24,770 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:24,775 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:24,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:24,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:24,778 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:24,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:24,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:24,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:24,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:24,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:24,799 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-02 11:55:25,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:25,276 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-02 11:55:25,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:25,276 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:25,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:25,277 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:55:25,277 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:55:25,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:25,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:55:25,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-02 11:55:25,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:25,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:25,522 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:25,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:25,522 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:25,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:25,523 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:25,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:25,523 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:25,523 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:25,523 INFO L423 AbstractCegarLoop]: === Iteration 233 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:25,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:25,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1354765955, now seen corresponding path program 219 times [2018-10-02 11:55:25,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:25,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:25,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:25,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:25,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:25,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:25,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:25,669 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:25,681 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-02 11:55:25,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:25,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:25,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:25,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:25,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:25,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:25,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:25,716 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:26,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:26,646 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:55:26,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:26,646 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:26,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:26,646 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:55:26,647 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:55:26,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:26,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:55:26,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-02 11:55:26,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:55:26,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:55:26,850 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:55:26,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:26,851 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:55:26,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:26,851 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:55:26,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:26,851 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:26,851 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:26,851 INFO L423 AbstractCegarLoop]: === Iteration 234 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:26,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:26,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1352920835, now seen corresponding path program 220 times [2018-10-02 11:55:26,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:26,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:26,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:26,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:26,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:26,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:26,915 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:26,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:26,915 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:26,923 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:26,929 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:26,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:26,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:26,953 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:26,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:26,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:26,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:26,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:26,954 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:55:27,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:27,383 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-02 11:55:27,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:27,383 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:27,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:27,384 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:55:27,384 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:55:27,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:27,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:55:27,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-02 11:55:27,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:27,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:27,595 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:27,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:27,595 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:27,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:27,596 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:27,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:27,596 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:27,596 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:55:27,596 INFO L423 AbstractCegarLoop]: === Iteration 235 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:27,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:27,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1352918913, now seen corresponding path program 221 times [2018-10-02 11:55:27,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:27,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:27,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:27,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:27,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:27,655 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:27,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:27,656 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:27,663 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:27,672 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-02 11:55:27,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:27,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:27,675 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:27,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:27,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:27,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:27,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:27,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:27,696 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:28,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:28,092 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:55:28,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:28,092 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:28,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:28,092 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:55:28,092 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:55:28,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:28,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:55:28,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-10-02 11:55:28,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:55:28,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:55:28,292 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-02 11:55:28,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:28,292 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:55:28,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:28,292 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:55:28,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:28,292 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:28,292 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:28,292 INFO L423 AbstractCegarLoop]: === Iteration 236 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:28,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:28,292 INFO L82 PathProgramCache]: Analyzing trace with hash 420239485, now seen corresponding path program 222 times [2018-10-02 11:55:28,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:28,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:28,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:28,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:28,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:28,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:28,768 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:28,777 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:28,789 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 11:55:28,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:28,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:28,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:28,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:28,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:28,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:28,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:28,814 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-02 11:55:29,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:29,206 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:55:29,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:29,206 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:29,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:29,207 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:55:29,207 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:55:29,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:29,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:55:29,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-02 11:55:29,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:29,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:29,425 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:29,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:29,425 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:29,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:29,425 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:29,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:29,425 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:29,425 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:55:29,425 INFO L423 AbstractCegarLoop]: === Iteration 237 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:29,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:29,426 INFO L82 PathProgramCache]: Analyzing trace with hash 420241407, now seen corresponding path program 223 times [2018-10-02 11:55:29,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:29,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:29,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:29,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:29,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:29,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:29,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:29,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:29,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:29,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:29,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:29,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:29,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:29,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:29,524 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:29,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:29,905 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:55:29,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:29,905 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:29,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:29,906 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:55:29,906 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:55:29,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:29,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:55:30,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-10-02 11:55:30,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:55:30,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:55:30,100 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:55:30,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:30,101 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:55:30,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:30,101 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:55:30,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:30,101 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:30,101 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:55:30,101 INFO L423 AbstractCegarLoop]: === Iteration 238 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:30,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:30,101 INFO L82 PathProgramCache]: Analyzing trace with hash 422086527, now seen corresponding path program 224 times [2018-10-02 11:55:30,101 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:30,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:30,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:30,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:30,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:30,163 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:30,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:30,164 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:30,173 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:30,178 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:30,178 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:30,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:30,181 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:30,202 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:30,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:30,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:30,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:30,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:30,203 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:55:30,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:30,576 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:55:30,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:30,576 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:30,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:30,576 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:55:30,576 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:55:30,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:30,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:55:30,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-10-02 11:55:30,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:30,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:30,778 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:30,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:30,779 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:30,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:30,779 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:30,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:30,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:30,779 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-02 11:55:30,779 INFO L423 AbstractCegarLoop]: === Iteration 239 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:30,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:30,779 INFO L82 PathProgramCache]: Analyzing trace with hash 422088449, now seen corresponding path program 225 times [2018-10-02 11:55:30,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:30,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:30,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:30,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:30,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:30,860 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:30,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:30,861 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:30,867 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:30,875 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-02 11:55:30,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:30,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:30,879 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:30,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:30,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:30,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:30,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:30,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:30,900 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:31,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:31,251 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:55:31,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:31,251 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:31,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:31,252 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:55:31,252 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:55:31,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:31,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:55:31,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 24. [2018-10-02 11:55:31,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:55:31,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:55:31,407 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-10-02 11:55:31,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:31,407 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:55:31,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:31,407 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:55:31,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:31,408 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:31,408 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:31,408 INFO L423 AbstractCegarLoop]: === Iteration 240 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:31,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:31,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1333761669, now seen corresponding path program 226 times [2018-10-02 11:55:31,408 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:31,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:31,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:31,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:31,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:31,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:31,472 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:31,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:31,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:31,481 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:31,487 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:31,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:31,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:31,519 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:31,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:31,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:31,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:31,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:31,520 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-10-02 11:55:31,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:31,973 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:55:31,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:31,973 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:31,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:31,974 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:55:31,974 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:55:31,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:31,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:55:32,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-10-02 11:55:32,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:32,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:32,197 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:32,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:32,197 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:32,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:32,197 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:32,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:32,197 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:32,197 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:32,197 INFO L423 AbstractCegarLoop]: === Iteration 241 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:32,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:32,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1333759747, now seen corresponding path program 227 times [2018-10-02 11:55:32,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:32,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:32,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:32,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:32,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:32,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:32,266 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:32,273 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:32,282 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-02 11:55:32,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:32,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:32,305 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:32,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:32,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:32,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:32,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:32,306 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:32,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:32,686 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:55:32,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:32,686 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:32,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:32,687 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:55:32,687 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:55:32,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:32,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:55:32,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-02 11:55:32,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:55:32,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:55:32,912 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:55:32,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:32,912 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:55:32,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:32,912 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:55:32,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:32,912 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:32,912 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:32,912 INFO L423 AbstractCegarLoop]: === Iteration 242 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:32,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:32,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1331914627, now seen corresponding path program 228 times [2018-10-02 11:55:32,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:32,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:32,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:32,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:32,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:32,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:32,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:32,982 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:32,992 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 11:55:32,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:32,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:33,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:33,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:33,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:33,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:33,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:33,017 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:55:33,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:33,370 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:55:33,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:33,370 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:33,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:33,371 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:55:33,371 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:55:33,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:33,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:55:33,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-10-02 11:55:33,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:33,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:33,600 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:33,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:33,600 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:33,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:33,601 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:33,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:33,601 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:33,601 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:55:33,601 INFO L423 AbstractCegarLoop]: === Iteration 243 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:33,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:33,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1331912705, now seen corresponding path program 229 times [2018-10-02 11:55:33,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:33,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:33,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:33,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:33,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:33,661 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:33,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:33,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:33,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:33,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:33,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:33,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:33,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:33,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:33,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:33,699 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:34,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:34,088 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-02 11:55:34,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:34,088 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:34,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:34,089 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:55:34,089 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:55:34,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:34,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:55:34,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-10-02 11:55:34,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:55:34,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:55:34,294 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-02 11:55:34,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:34,294 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:55:34,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:34,294 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:55:34,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:34,294 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:34,294 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:34,295 INFO L423 AbstractCegarLoop]: === Iteration 244 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:34,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:34,295 INFO L82 PathProgramCache]: Analyzing trace with hash 441245693, now seen corresponding path program 230 times [2018-10-02 11:55:34,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:34,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:34,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:34,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:34,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:34,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:34,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:34,359 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:34,365 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:34,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:34,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:34,369 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:34,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:34,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:34,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:34,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:34,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:34,389 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-02 11:55:34,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:34,763 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:55:34,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:34,763 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:34,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:34,763 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:55:34,763 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:55:34,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:34,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:55:34,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-10-02 11:55:34,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:34,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:34,981 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:34,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:34,981 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:34,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:34,981 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:34,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:34,981 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:34,981 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:55:34,982 INFO L423 AbstractCegarLoop]: === Iteration 245 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:34,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:34,982 INFO L82 PathProgramCache]: Analyzing trace with hash 441247615, now seen corresponding path program 231 times [2018-10-02 11:55:34,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:34,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:34,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:34,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:34,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:35,048 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:35,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:35,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:35,057 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:35,078 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-02 11:55:35,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:35,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:35,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:35,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:35,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:35,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:35,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:35,112 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:35,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:35,559 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:55:35,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:35,559 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:35,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:35,559 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:55:35,559 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:55:35,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:35,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:55:35,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-02 11:55:35,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:55:35,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:55:35,775 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:55:35,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:35,776 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:55:35,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:35,776 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:55:35,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:35,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:35,776 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:55:35,776 INFO L423 AbstractCegarLoop]: === Iteration 246 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:35,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:35,776 INFO L82 PathProgramCache]: Analyzing trace with hash 443092735, now seen corresponding path program 232 times [2018-10-02 11:55:35,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:35,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:35,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:35,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:35,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:35,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:35,949 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:35,959 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:35,964 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:35,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:35,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:35,967 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:35,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:35,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:35,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:35,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:35,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:35,987 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:55:36,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:36,368 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:55:36,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:36,368 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:36,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:36,369 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:55:36,369 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:55:36,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:36,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:55:36,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-10-02 11:55:36,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:36,603 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:36,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:36,603 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:36,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:36,603 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:36,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:36,604 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:36,604 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-02 11:55:36,604 INFO L423 AbstractCegarLoop]: === Iteration 247 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:36,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:36,604 INFO L82 PathProgramCache]: Analyzing trace with hash 443094657, now seen corresponding path program 233 times [2018-10-02 11:55:36,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:36,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:36,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:36,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:36,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:36,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:36,668 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:36,676 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:36,685 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-02 11:55:36,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:36,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:36,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:36,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:36,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:36,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:36,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:36,709 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:37,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:37,067 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-02 11:55:37,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:37,067 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:37,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:37,067 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:55:37,067 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:55:37,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:37,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:55:37,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-10-02 11:55:37,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:55:37,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:55:37,258 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-02 11:55:37,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:37,258 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:55:37,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:37,258 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:55:37,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:37,258 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:37,258 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-02 11:55:37,258 INFO L423 AbstractCegarLoop]: === Iteration 248 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:37,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:37,259 INFO L82 PathProgramCache]: Analyzing trace with hash -653703299, now seen corresponding path program 234 times [2018-10-02 11:55:37,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:37,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:37,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:37,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:37,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:37,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:37,321 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:37,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:37,322 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:37,330 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:37,337 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 11:55:37,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:37,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:37,341 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:37,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:37,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:37,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:37,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:37,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:37,361 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-02 11:55:37,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:37,689 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-02 11:55:37,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:37,689 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:37,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:37,690 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:55:37,690 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:55:37,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:37,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:55:37,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-10-02 11:55:37,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:37,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:37,915 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:37,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:37,916 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:37,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:37,916 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:37,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:37,916 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:37,916 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:55:37,916 INFO L423 AbstractCegarLoop]: === Iteration 249 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:37,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:37,917 INFO L82 PathProgramCache]: Analyzing trace with hash -653701377, now seen corresponding path program 235 times [2018-10-02 11:55:37,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:37,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:37,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:37,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:37,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:37,984 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:37,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:37,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:37,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:37,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:38,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:38,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:38,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:38,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:38,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:38,020 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:38,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:38,358 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:55:38,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:38,358 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:38,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:38,359 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:55:38,359 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:55:38,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:38,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:55:38,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-10-02 11:55:38,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:55:38,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:55:38,577 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:55:38,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:38,577 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:55:38,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:38,577 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:55:38,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:38,577 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:38,577 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:55:38,577 INFO L423 AbstractCegarLoop]: === Iteration 250 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:38,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:38,578 INFO L82 PathProgramCache]: Analyzing trace with hash -651856257, now seen corresponding path program 236 times [2018-10-02 11:55:38,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:38,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:38,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:38,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:38,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:38,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:38,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:38,671 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:38,676 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:38,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:38,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:38,679 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:38,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:38,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:38,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:38,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:38,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:38,711 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:55:39,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:39,129 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-02 11:55:39,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:39,129 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:39,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:39,130 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:55:39,130 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:55:39,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:39,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:55:39,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-10-02 11:55:39,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:39,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:39,364 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:39,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:39,364 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:39,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:39,364 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:39,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:39,364 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:39,364 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-02 11:55:39,365 INFO L423 AbstractCegarLoop]: === Iteration 251 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:39,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:39,365 INFO L82 PathProgramCache]: Analyzing trace with hash -651854335, now seen corresponding path program 237 times [2018-10-02 11:55:39,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:39,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:39,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:39,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:39,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:39,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:39,429 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:39,437 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:39,446 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-02 11:55:39,446 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:39,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:39,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:39,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:39,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:39,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:39,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:39,470 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:39,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:39,797 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:55:39,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:39,797 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:39,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:39,798 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:55:39,798 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:55:39,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:39,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:55:40,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-10-02 11:55:40,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:55:40,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:55:40,001 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-02 11:55:40,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:40,001 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:55:40,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:40,002 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:55:40,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:40,002 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:40,002 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-02 11:55:40,002 INFO L423 AbstractCegarLoop]: === Iteration 252 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:40,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:40,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1121304063, now seen corresponding path program 238 times [2018-10-02 11:55:40,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:40,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:40,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:40,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:40,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:40,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:40,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:40,082 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:40,087 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:40,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:40,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:40,091 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:40,110 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:40,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:40,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:40,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:40,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:40,111 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-02 11:55:40,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:40,422 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-02 11:55:40,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:40,422 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:40,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:40,423 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:55:40,423 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:55:40,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:40,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:55:40,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2018-10-02 11:55:40,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:40,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:40,646 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:40,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:40,646 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:40,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:40,646 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:40,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:40,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:40,647 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-02 11:55:40,647 INFO L423 AbstractCegarLoop]: === Iteration 253 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:40,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:40,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1121305985, now seen corresponding path program 239 times [2018-10-02 11:55:40,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:40,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:40,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:40,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:40,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:40,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:40,707 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:40,715 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:40,727 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-02 11:55:40,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:40,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:40,750 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:40,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:40,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:40,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:40,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:40,751 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:41,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:41,077 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-02 11:55:41,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:41,077 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:41,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:41,077 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:55:41,077 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:55:41,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:41,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:55:41,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2018-10-02 11:55:41,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:55:41,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:55:41,297 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-02 11:55:41,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:41,297 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:55:41,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:41,297 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:55:41,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:41,297 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:41,298 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-02 11:55:41,298 INFO L423 AbstractCegarLoop]: === Iteration 254 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:41,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:41,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1123151105, now seen corresponding path program 240 times [2018-10-02 11:55:41,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:41,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:41,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:41,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:41,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:41,360 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:41,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:41,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:41,368 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:41,378 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 11:55:41,379 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:41,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:41,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:41,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:41,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:41,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:41,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:41,402 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-02 11:55:41,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:41,703 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-02 11:55:41,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:41,703 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:41,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:41,703 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:55:41,703 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:55:41,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:41,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:55:41,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2018-10-02 11:55:41,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:41,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:41,935 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-02 11:55:41,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:41,935 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:41,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:41,935 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:41,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:55:41,936 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:41,936 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-10-02 11:55:41,936 INFO L423 AbstractCegarLoop]: === Iteration 255 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:41,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:41,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1123153027, now seen corresponding path program 7 times [2018-10-02 11:55:41,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:41,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:41,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:41,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:41,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:42,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:42,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:42,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:42,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:42,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:42,111 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:42,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:42,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:55:42,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:55:42,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:55:42,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:42,131 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-02 11:55:42,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:42,403 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2018-10-02 11:55:42,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:55:42,403 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-02 11:55:42,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:42,404 INFO L225 Difference]: With dead ends: 36 [2018-10-02 11:55:42,404 INFO L226 Difference]: Without dead ends: 34 [2018-10-02 11:55:42,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:55:42,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-02 11:55:42,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 20. [2018-10-02 11:55:42,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 11:55:42,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-02 11:55:42,549 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-10-02 11:55:42,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:42,549 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-02 11:55:42,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:55:42,549 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-02 11:55:42,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:55:42,549 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:42,549 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1] [2018-10-02 11:55:42,550 INFO L423 AbstractCegarLoop]: === Iteration 256 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:42,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:42,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1610002744, now seen corresponding path program 8 times [2018-10-02 11:55:42,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:42,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:42,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:42,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:42,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:42,669 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:42,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:42,670 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:42,682 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:42,688 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:42,689 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:42,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:42,712 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:42,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:55:42,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:55:42,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:55:42,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:42,713 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 11 states. [2018-10-02 11:55:43,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:43,281 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-02 11:55:43,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:55:43,283 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:55:43,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:43,283 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:55:43,283 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:55:43,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:43,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:55:43,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-02 11:55:43,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:55:43,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:55:43,576 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:55:43,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:43,578 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:55:43,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:55:43,578 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:55:43,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:55:43,578 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:43,578 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-02 11:55:43,579 INFO L423 AbstractCegarLoop]: === Iteration 257 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:43,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:43,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1610004666, now seen corresponding path program 241 times [2018-10-02 11:55:43,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:43,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:43,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:43,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:43,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:43,652 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:43,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:43,652 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:43,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:43,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:43,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:43,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:55:43,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:55:43,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:55:43,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:43,695 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:55:44,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:44,284 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-02 11:55:44,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:55:44,285 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:55:44,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:44,285 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:55:44,285 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:55:44,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:44,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:55:44,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-02 11:55:44,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:44,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:44,543 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:55:44,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:44,543 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:44,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:55:44,543 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:44,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:55:44,543 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:44,543 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-02 11:55:44,543 INFO L423 AbstractCegarLoop]: === Iteration 258 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:44,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:44,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1611849786, now seen corresponding path program 242 times [2018-10-02 11:55:44,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:44,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:44,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:44,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:44,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:44,612 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:44,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:44,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:44,620 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:44,625 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:44,626 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:44,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:44,630 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:44,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:44,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:55:44,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:55:44,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:55:44,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:44,651 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:55:45,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:45,221 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-02 11:55:45,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:55:45,221 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:55:45,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:45,221 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:55:45,221 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:55:45,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:45,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:55:45,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-02 11:55:45,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:55:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:55:45,489 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:55:45,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:45,490 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:55:45,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:55:45,490 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:55:45,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:55:45,490 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:45,490 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:55:45,490 INFO L423 AbstractCegarLoop]: === Iteration 259 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:45,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:45,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1611851708, now seen corresponding path program 243 times [2018-10-02 11:55:45,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:45,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:45,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:45,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:45,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:45,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:45,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:45,569 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:45,579 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:55:45,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:45,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:45,582 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:45,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:45,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:55:45,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:55:45,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:55:45,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:45,603 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:55:46,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:46,137 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-02 11:55:46,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:55:46,137 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:55:46,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:46,137 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:55:46,137 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:55:46,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:46,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:55:46,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-10-02 11:55:46,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:55:46,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:55:46,405 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-02 11:55:46,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:46,405 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:55:46,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:55:46,405 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:55:46,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:55:46,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:46,406 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-02 11:55:46,406 INFO L423 AbstractCegarLoop]: === Iteration 260 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:46,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:46,406 INFO L82 PathProgramCache]: Analyzing trace with hash -909957190, now seen corresponding path program 244 times [2018-10-02 11:55:46,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:46,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:46,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:46,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:46,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:46,475 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:46,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:46,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:46,484 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:46,490 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:46,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:46,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:46,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:46,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:55:46,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:55:46,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:55:46,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:46,513 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-02 11:55:47,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:47,098 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-02 11:55:47,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:55:47,098 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:55:47,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:47,098 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:55:47,098 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:55:47,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:47,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:55:47,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-02 11:55:47,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:55:47,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:55:47,389 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:55:47,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:47,389 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:55:47,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:55:47,390 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:55:47,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:55:47,390 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:47,390 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:55:47,390 INFO L423 AbstractCegarLoop]: === Iteration 261 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:47,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:47,390 INFO L82 PathProgramCache]: Analyzing trace with hash -909955268, now seen corresponding path program 245 times [2018-10-02 11:55:47,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:47,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:47,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:47,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:47,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:47,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:47,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:47,466 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:47,476 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-02 11:55:47,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:47,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:47,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:47,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:55:47,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:55:47,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:55:47,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:47,501 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:55:48,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:48,084 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-02 11:55:48,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:55:48,084 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:55:48,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:48,085 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:55:48,085 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:55:48,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:48,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:55:48,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-02 11:55:48,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:48,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:48,352 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:55:48,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:48,352 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:48,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:55:48,352 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:48,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:55:48,353 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:48,353 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:55:48,353 INFO L423 AbstractCegarLoop]: === Iteration 262 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:48,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:48,353 INFO L82 PathProgramCache]: Analyzing trace with hash -908110148, now seen corresponding path program 246 times [2018-10-02 11:55:48,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:48,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:48,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:48,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:48,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:48,424 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:48,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:48,425 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:48,434 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:48,443 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-02 11:55:48,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:48,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:48,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:48,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:55:48,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:55:48,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:55:48,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:48,469 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:55:49,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:49,036 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-02 11:55:49,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:55:49,036 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:55:49,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:49,037 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:55:49,037 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:55:49,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:49,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:55:49,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-02 11:55:49,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:55:49,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:55:49,323 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:55:49,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:49,323 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:55:49,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:55:49,323 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:55:49,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:55:49,323 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:49,323 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:55:49,323 INFO L423 AbstractCegarLoop]: === Iteration 263 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:49,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:49,324 INFO L82 PathProgramCache]: Analyzing trace with hash -908108226, now seen corresponding path program 247 times [2018-10-02 11:55:49,324 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:49,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:49,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:49,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:49,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:49,390 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:49,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:49,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:49,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:49,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:49,413 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:49,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:49,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:55:49,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:55:49,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:55:49,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:49,433 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:55:49,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:49,977 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-02 11:55:49,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:55:49,977 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:55:49,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:49,978 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:55:49,978 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:55:49,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:49,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:55:50,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-10-02 11:55:50,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:55:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:55:50,212 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-02 11:55:50,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:50,213 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:55:50,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:55:50,213 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:55:50,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:55:50,213 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:50,213 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-02 11:55:50,213 INFO L423 AbstractCegarLoop]: === Iteration 264 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:50,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:50,213 INFO L82 PathProgramCache]: Analyzing trace with hash -2004906182, now seen corresponding path program 248 times [2018-10-02 11:55:50,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:50,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:50,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:50,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:50,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:50,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:50,282 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:50,290 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:50,303 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:50,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:50,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:50,306 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:50,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:50,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:55:50,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:55:50,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:55:50,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:50,326 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-02 11:55:50,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:50,877 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-02 11:55:50,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:55:50,877 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:55:50,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:50,877 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:55:50,877 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:55:50,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:50,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:55:51,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-02 11:55:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:55:51,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:55:51,152 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:55:51,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:51,152 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:55:51,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:55:51,152 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:55:51,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:55:51,153 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:51,153 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:55:51,153 INFO L423 AbstractCegarLoop]: === Iteration 265 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:51,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:51,153 INFO L82 PathProgramCache]: Analyzing trace with hash -2004904260, now seen corresponding path program 249 times [2018-10-02 11:55:51,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:51,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:51,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:51,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:51,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:51,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:51,276 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:51,283 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:51,293 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:55:51,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:51,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:51,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:51,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:55:51,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:55:51,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:55:51,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:51,325 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:55:51,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:51,857 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-02 11:55:51,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:55:51,857 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:55:51,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:51,858 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:55:51,858 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:55:51,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:51,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:55:52,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-02 11:55:52,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:52,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:52,134 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:55:52,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:52,134 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:52,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:55:52,134 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:52,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:55:52,134 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:52,134 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:55:52,135 INFO L423 AbstractCegarLoop]: === Iteration 266 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:52,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:52,135 INFO L82 PathProgramCache]: Analyzing trace with hash -2003059140, now seen corresponding path program 250 times [2018-10-02 11:55:52,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:52,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:52,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:52,135 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:52,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:52,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:52,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:52,213 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:52,219 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:52,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:52,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:52,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:52,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:55:52,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:55:52,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:55:52,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:52,244 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:55:52,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:52,807 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-02 11:55:52,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:55:52,807 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:55:52,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:52,808 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:55:52,808 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:55:52,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:52,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:55:53,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-02 11:55:53,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:55:53,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:55:53,105 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:55:53,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:53,105 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:55:53,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:55:53,105 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:55:53,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:55:53,105 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:53,105 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:55:53,106 INFO L423 AbstractCegarLoop]: === Iteration 267 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:53,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:53,106 INFO L82 PathProgramCache]: Analyzing trace with hash -2003057218, now seen corresponding path program 251 times [2018-10-02 11:55:53,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:53,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:53,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:53,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:53,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:53,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:53,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:53,210 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:53,221 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-02 11:55:53,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:53,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:53,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:53,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:55:53,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:55:53,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:55:53,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:53,246 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:55:53,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:53,775 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-02 11:55:53,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:55:53,775 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:55:53,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:53,775 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:55:53,775 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:55:53,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:53,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:55:54,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-10-02 11:55:54,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:55:54,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:55:54,033 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-02 11:55:54,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:54,033 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:55:54,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:55:54,033 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:55:54,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:55:54,033 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:54,033 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:55:54,033 INFO L423 AbstractCegarLoop]: === Iteration 268 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:54,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:54,034 INFO L82 PathProgramCache]: Analyzing trace with hash -229898820, now seen corresponding path program 252 times [2018-10-02 11:55:54,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:54,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:54,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:54,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:54,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:54,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:54,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:54,116 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:54,125 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-02 11:55:54,125 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:54,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:54,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:54,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:55:54,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:55:54,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:55:54,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:54,150 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-02 11:55:54,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:54,663 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-02 11:55:54,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:55:54,663 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:55:54,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:54,664 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:55:54,664 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:55:54,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:54,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:55:54,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-10-02 11:55:54,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:55:54,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:55:54,948 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:55:54,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:54,948 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:55:54,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:55:54,948 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:55:54,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:55:54,948 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:54,948 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:55:54,949 INFO L423 AbstractCegarLoop]: === Iteration 269 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:54,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:54,949 INFO L82 PathProgramCache]: Analyzing trace with hash -229896898, now seen corresponding path program 253 times [2018-10-02 11:55:54,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:54,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:54,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:54,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:54,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:55,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:55,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:55,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:55,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:55,037 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:55,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:55,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:55:55,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:55:55,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:55:55,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:55,061 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:55:55,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:55,572 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-02 11:55:55,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:55:55,572 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:55:55,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:55,573 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:55:55,573 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:55:55,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:55,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:55:55,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-02 11:55:55,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:55,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:55,842 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:55:55,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:55,842 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:55,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:55:55,842 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:55,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:55:55,842 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:55,842 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:55:55,842 INFO L423 AbstractCegarLoop]: === Iteration 270 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:55,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:55,843 INFO L82 PathProgramCache]: Analyzing trace with hash -228051778, now seen corresponding path program 254 times [2018-10-02 11:55:55,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:55,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:55,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:55,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:55,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:55,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:55,910 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:55,911 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:55,919 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:55,927 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:55,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:55,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:55,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:55,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:55:55,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:55:55,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:55:55,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:55,961 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:55:56,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:56,428 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:55:56,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:55:56,428 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:55:56,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:56,428 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:55:56,428 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:55:56,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:56,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:55:56,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-02 11:55:56,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:55:56,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:55:56,725 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:55:56,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:56,726 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:55:56,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:55:56,726 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:55:56,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:55:56,726 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:56,726 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:55:56,726 INFO L423 AbstractCegarLoop]: === Iteration 271 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:56,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:56,726 INFO L82 PathProgramCache]: Analyzing trace with hash -228049856, now seen corresponding path program 255 times [2018-10-02 11:55:56,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:56,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:56,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:56,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:56,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:56,816 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:56,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:56,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:56,823 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:56,833 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:55:56,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:56,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:56,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:56,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:55:56,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:55:56,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:55:56,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:56,857 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:55:57,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:57,330 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:55:57,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:55:57,330 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:55:57,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:57,330 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:55:57,330 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:55:57,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:57,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:55:57,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-10-02 11:55:57,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:55:57,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:55:57,630 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-10-02 11:55:57,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:57,630 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:55:57,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:55:57,630 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:55:57,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:55:57,631 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:57,631 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-02 11:55:57,631 INFO L423 AbstractCegarLoop]: === Iteration 272 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:57,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:57,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1983899974, now seen corresponding path program 256 times [2018-10-02 11:55:57,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:57,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:57,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:57,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:57,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:57,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:57,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:57,711 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:57,718 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:57,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:57,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:57,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:57,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:55:57,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:55:57,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:55:57,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:57,742 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-10-02 11:55:58,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:58,360 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-02 11:55:58,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:55:58,360 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:55:58,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:58,361 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:55:58,361 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:55:58,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:58,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:55:58,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-02 11:55:58,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:55:58,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:55:58,635 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:55:58,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:58,635 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:55:58,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:55:58,635 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:55:58,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:55:58,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:58,635 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:55:58,636 INFO L423 AbstractCegarLoop]: === Iteration 273 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:58,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:58,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1983898052, now seen corresponding path program 257 times [2018-10-02 11:55:58,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:58,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:58,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:58,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:58,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:58,703 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:58,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:58,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:58,711 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:58,722 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-02 11:55:58,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:58,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:58,746 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:58,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:55:58,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:55:58,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:55:58,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:58,746 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:55:59,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:59,367 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-02 11:55:59,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:55:59,367 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:55:59,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:59,368 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:55:59,368 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:55:59,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:59,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:55:59,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-02 11:55:59,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:55:59,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:55:59,639 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:55:59,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:59,639 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:55:59,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:55:59,639 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:55:59,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:55:59,639 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:59,640 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:55:59,640 INFO L423 AbstractCegarLoop]: === Iteration 274 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:59,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:59,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1982052932, now seen corresponding path program 258 times [2018-10-02 11:55:59,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:59,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:59,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:59,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:59,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:59,718 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:59,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:59,719 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:59,726 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:59,737 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-02 11:55:59,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:59,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:59,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:59,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:55:59,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:55:59,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:55:59,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:55:59,762 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:56:00,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:00,356 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-02 11:56:00,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:00,356 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:00,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:00,357 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:56:00,357 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:56:00,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:00,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:56:00,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-02 11:56:00,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:00,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:00,644 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:00,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:00,644 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:00,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:00,645 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:00,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:00,645 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:00,645 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:00,645 INFO L423 AbstractCegarLoop]: === Iteration 275 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:00,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:00,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1982051010, now seen corresponding path program 259 times [2018-10-02 11:56:00,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:00,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:00,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:00,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:00,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:00,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:00,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:00,730 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:00,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:00,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:00,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:00,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:00,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:00,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:00,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:00,768 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:01,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:01,342 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-02 11:56:01,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:01,342 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:01,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:01,342 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:56:01,342 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:56:01,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:01,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:56:01,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-10-02 11:56:01,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:56:01,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:56:01,594 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-02 11:56:01,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:01,594 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:56:01,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:01,594 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:56:01,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:01,594 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:01,594 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:56:01,594 INFO L423 AbstractCegarLoop]: === Iteration 276 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:01,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:01,594 INFO L82 PathProgramCache]: Analyzing trace with hash -208892612, now seen corresponding path program 260 times [2018-10-02 11:56:01,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:01,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:01,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:01,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:01,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:01,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:01,670 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:01,678 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:56:01,684 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:56:01,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:01,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:01,688 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:01,709 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:01,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:01,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:01,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:01,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:01,709 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-02 11:56:02,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:02,347 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-02 11:56:02,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:02,347 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:02,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:02,348 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:56:02,348 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:56:02,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:02,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:56:02,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-02 11:56:02,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:02,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:02,640 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:02,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:02,640 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:02,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:02,640 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:02,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:02,640 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:02,640 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:02,640 INFO L423 AbstractCegarLoop]: === Iteration 277 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:02,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:02,641 INFO L82 PathProgramCache]: Analyzing trace with hash -208890690, now seen corresponding path program 261 times [2018-10-02 11:56:02,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:02,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:02,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:02,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:02,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:02,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:02,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:02,709 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:02,718 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:56:02,728 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:56:02,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:02,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:02,731 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:02,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:02,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:02,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:02,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:02,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:02,753 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:03,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:03,373 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-02 11:56:03,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:03,373 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:03,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:03,374 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:56:03,374 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:56:03,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:03,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:56:03,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-02 11:56:03,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:56:03,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:56:03,661 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:56:03,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:03,661 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:56:03,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:03,661 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:56:03,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:03,661 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:03,661 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:03,661 INFO L423 AbstractCegarLoop]: === Iteration 278 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:03,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:03,661 INFO L82 PathProgramCache]: Analyzing trace with hash -207045570, now seen corresponding path program 262 times [2018-10-02 11:56:03,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:03,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:03,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:03,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:03,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:03,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:03,730 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:03,738 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:56:03,745 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:56:03,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:03,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:03,748 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:03,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:03,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:03,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:03,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:03,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:03,769 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:56:04,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:04,374 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-02 11:56:04,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:04,374 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:04,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:04,375 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:56:04,375 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:56:04,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:04,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:56:04,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-02 11:56:04,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:04,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:04,669 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:04,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:04,669 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:04,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:04,669 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:04,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:04,669 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:04,669 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:56:04,670 INFO L423 AbstractCegarLoop]: === Iteration 279 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:04,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:04,670 INFO L82 PathProgramCache]: Analyzing trace with hash -207043648, now seen corresponding path program 263 times [2018-10-02 11:56:04,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:04,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:04,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:04,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:04,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:04,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:04,737 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:04,744 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:56:04,754 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-02 11:56:04,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:04,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:04,759 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:04,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:04,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:04,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:04,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:04,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:04,780 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:05,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:05,359 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-02 11:56:05,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:05,359 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:05,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:05,360 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:56:05,360 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:56:05,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:05,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:56:05,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-10-02 11:56:05,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:56:05,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:56:05,611 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-02 11:56:05,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:05,611 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:56:05,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:05,611 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:56:05,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:05,611 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:05,611 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:56:05,611 INFO L423 AbstractCegarLoop]: === Iteration 280 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:05,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:05,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1303841604, now seen corresponding path program 264 times [2018-10-02 11:56:05,612 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:05,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:05,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:05,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:05,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:05,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:05,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:05,708 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:56:05,721 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-02 11:56:05,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:05,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:05,725 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:05,746 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:05,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:05,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:05,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:05,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:05,746 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-02 11:56:06,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:06,314 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-02 11:56:06,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:06,314 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:06,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:06,314 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:56:06,314 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:56:06,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:06,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:56:06,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-02 11:56:06,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:06,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:06,610 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:06,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:06,610 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:06,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:06,610 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:06,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:06,611 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:06,611 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:06,611 INFO L423 AbstractCegarLoop]: === Iteration 281 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:06,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:06,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1303839682, now seen corresponding path program 265 times [2018-10-02 11:56:06,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:06,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:06,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:06,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:06,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:06,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:06,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:06,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:06,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:06,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:06,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:06,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:06,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:06,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:06,951 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:07,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:07,507 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-02 11:56:07,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:07,507 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:07,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:07,507 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:56:07,507 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:56:07,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:07,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:56:07,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-02 11:56:07,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:56:07,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:56:07,792 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:56:07,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:07,792 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:56:07,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:07,792 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:56:07,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:07,793 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:07,793 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:07,793 INFO L423 AbstractCegarLoop]: === Iteration 282 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:07,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:07,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1301994562, now seen corresponding path program 266 times [2018-10-02 11:56:07,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:07,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:07,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:07,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:07,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:07,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:07,861 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:07,869 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:56:07,874 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:56:07,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:07,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:07,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:07,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:07,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:07,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:07,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:07,899 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:56:08,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:08,485 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-02 11:56:08,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:08,485 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:08,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:08,486 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:56:08,486 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:56:08,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:08,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:56:08,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-02 11:56:08,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:08,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:08,818 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:08,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:08,818 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:08,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:08,818 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:08,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:08,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:08,818 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:56:08,818 INFO L423 AbstractCegarLoop]: === Iteration 283 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:08,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:08,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1301992640, now seen corresponding path program 267 times [2018-10-02 11:56:08,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:08,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:08,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:08,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:08,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:08,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:08,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:08,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:08,899 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:56:08,932 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:56:08,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:08,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:08,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:08,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:08,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:08,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:08,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:08,969 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:09,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:09,593 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-02 11:56:09,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:09,593 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:09,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:09,594 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:56:09,594 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:56:09,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:09,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:56:09,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-10-02 11:56:09,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:56:09,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:56:09,882 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-02 11:56:09,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:09,883 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:56:09,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:09,883 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:56:09,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:09,883 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:09,883 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:09,883 INFO L423 AbstractCegarLoop]: === Iteration 284 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:09,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:09,883 INFO L82 PathProgramCache]: Analyzing trace with hash 471165758, now seen corresponding path program 268 times [2018-10-02 11:56:09,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:09,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:09,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:09,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:09,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:09,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:09,954 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:09,962 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:56:09,969 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:56:09,969 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:09,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:09,973 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:09,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:09,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:09,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:09,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:09,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:09,994 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-02 11:56:10,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:10,525 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-02 11:56:10,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:10,525 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:10,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:10,526 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:56:10,526 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:56:10,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:10,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:56:10,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-10-02 11:56:10,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:10,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:10,822 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:10,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:10,822 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:10,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:10,823 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:10,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:10,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:10,823 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:56:10,823 INFO L423 AbstractCegarLoop]: === Iteration 285 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:10,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:10,823 INFO L82 PathProgramCache]: Analyzing trace with hash 471167680, now seen corresponding path program 269 times [2018-10-02 11:56:10,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:10,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:10,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:10,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:10,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:10,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:10,894 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:10,905 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:56:10,915 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-02 11:56:10,916 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:10,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:10,918 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:10,939 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:10,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:10,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:10,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:10,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:10,940 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:11,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:11,492 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-02 11:56:11,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:11,492 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:11,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:11,493 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:56:11,493 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:56:11,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:11,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:56:11,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-02 11:56:11,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:56:11,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:56:11,789 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:56:11,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:11,789 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:56:11,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:11,789 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:56:11,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:11,789 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:11,789 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:56:11,789 INFO L423 AbstractCegarLoop]: === Iteration 286 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:11,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:11,790 INFO L82 PathProgramCache]: Analyzing trace with hash 473012800, now seen corresponding path program 270 times [2018-10-02 11:56:11,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:11,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:11,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:11,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:11,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:11,888 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:11,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:11,895 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:56:11,906 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-02 11:56:11,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:11,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:11,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:11,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:11,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:11,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:11,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:11,930 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:56:12,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:12,440 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:56:12,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:12,440 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:12,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:12,441 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:56:12,441 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:56:12,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:12,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:56:12,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-02 11:56:12,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:12,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:12,723 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:12,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:12,723 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:12,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:12,723 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:12,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:12,723 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:12,723 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:12,724 INFO L423 AbstractCegarLoop]: === Iteration 287 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:12,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:12,724 INFO L82 PathProgramCache]: Analyzing trace with hash 473014722, now seen corresponding path program 271 times [2018-10-02 11:56:12,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:12,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:12,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:12,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:12,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:12,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:12,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:12,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:12,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:12,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:12,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:12,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:12,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:12,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:12,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:12,831 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:13,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:13,305 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:56:13,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:13,305 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:13,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:13,306 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:56:13,306 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:56:13,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:13,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:56:13,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2018-10-02 11:56:13,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:56:13,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:56:13,517 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2018-10-02 11:56:13,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:13,517 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:56:13,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:13,518 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:56:13,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:13,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:13,518 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-02 11:56:13,518 INFO L423 AbstractCegarLoop]: === Iteration 288 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:13,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:13,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1023196730, now seen corresponding path program 272 times [2018-10-02 11:56:13,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:13,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:13,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:13,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:13,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:13,593 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:13,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:13,601 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:56:13,610 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:56:13,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:13,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:13,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:13,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:13,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:13,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:13,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:13,634 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 11 states. [2018-10-02 11:56:14,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:14,199 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-02 11:56:14,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:14,199 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:14,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:14,199 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:56:14,199 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:56:14,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:14,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:56:14,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-02 11:56:14,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:14,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:14,503 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:14,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:14,503 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:14,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:14,503 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:14,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:14,503 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:14,503 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:56:14,503 INFO L423 AbstractCegarLoop]: === Iteration 289 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:14,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:14,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1023198652, now seen corresponding path program 273 times [2018-10-02 11:56:14,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:14,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:14,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:14,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:14,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:14,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:14,571 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:14,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:56:14,590 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:56:14,590 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:14,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:14,613 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:14,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:14,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:14,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:14,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:14,614 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:15,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:15,178 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-02 11:56:15,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:15,178 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:15,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:15,179 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:56:15,179 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:56:15,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:15,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:56:15,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-02 11:56:15,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:56:15,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:56:15,477 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:56:15,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:15,478 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:56:15,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:15,478 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:56:15,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:15,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:15,478 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:56:15,478 INFO L423 AbstractCegarLoop]: === Iteration 290 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:15,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:15,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1025043772, now seen corresponding path program 274 times [2018-10-02 11:56:15,478 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:15,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:15,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:15,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:15,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:15,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:15,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:15,554 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:56:15,561 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:56:15,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:15,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:15,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:15,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:15,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:15,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:15,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:15,596 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:56:16,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:16,335 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-02 11:56:16,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:16,335 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:16,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:16,336 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:56:16,336 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:56:16,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:16,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:56:16,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-02 11:56:16,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:16,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:16,644 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:16,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:16,644 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:16,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:16,644 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:16,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:16,645 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:16,645 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:16,645 INFO L423 AbstractCegarLoop]: === Iteration 291 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:16,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:16,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1025045694, now seen corresponding path program 275 times [2018-10-02 11:56:16,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:16,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:16,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:16,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:16,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:16,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:16,758 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:16,766 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:56:16,784 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-02 11:56:16,785 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:16,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:16,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:16,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:16,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:16,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:16,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:16,807 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:17,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:17,374 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-02 11:56:17,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:17,374 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:17,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:17,375 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:56:17,375 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:56:17,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:17,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:56:17,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-02 11:56:17,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:56:17,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:56:17,658 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-02 11:56:17,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:17,658 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:56:17,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:17,658 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:56:17,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:17,658 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:17,658 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:56:17,658 INFO L423 AbstractCegarLoop]: === Iteration 292 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:17,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:17,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1496763204, now seen corresponding path program 276 times [2018-10-02 11:56:17,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:17,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:17,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:17,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:17,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:17,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:17,738 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:17,746 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:56:17,758 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-02 11:56:17,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:17,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:17,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:17,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:17,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:17,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:17,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:17,782 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-02 11:56:18,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:18,319 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:56:18,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:18,319 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:18,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:18,320 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:56:18,320 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:56:18,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:18,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:56:18,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-02 11:56:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:18,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:18,621 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:18,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:18,621 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:18,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:18,621 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:18,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:18,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:18,622 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:18,622 INFO L423 AbstractCegarLoop]: === Iteration 293 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:18,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:18,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1496761282, now seen corresponding path program 277 times [2018-10-02 11:56:18,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:18,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:18,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:18,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:18,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:18,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:18,690 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:18,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:18,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:18,709 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:18,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:18,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:18,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:18,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:18,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:18,730 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:19,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:19,250 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:56:19,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:19,250 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:19,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:19,250 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:56:19,250 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:56:19,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:19,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:56:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-02 11:56:19,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:56:19,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:56:19,669 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:56:19,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:19,669 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:56:19,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:19,669 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:56:19,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:19,670 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:19,670 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:19,670 INFO L423 AbstractCegarLoop]: === Iteration 294 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:19,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:19,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1494916162, now seen corresponding path program 278 times [2018-10-02 11:56:19,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:19,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:19,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:19,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:19,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:19,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:19,743 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:19,752 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:56:19,757 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:56:19,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:19,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:19,761 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:19,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:19,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:19,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:19,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:19,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:19,781 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:56:20,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:20,293 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:56:20,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:20,293 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:20,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:20,294 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:56:20,294 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:56:20,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:20,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:56:20,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-02 11:56:20,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:20,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:20,631 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:20,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:20,631 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:20,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:20,631 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:20,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:20,632 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:20,632 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:56:20,632 INFO L423 AbstractCegarLoop]: === Iteration 295 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:20,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:20,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1494914240, now seen corresponding path program 279 times [2018-10-02 11:56:20,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:20,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:20,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:20,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:20,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:20,711 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:20,711 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:20,717 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:56:20,726 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:56:20,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:20,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:20,750 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:20,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:20,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:20,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:20,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:20,751 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:21,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:21,249 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:56:21,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:21,249 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:21,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:21,250 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:56:21,250 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:56:21,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:21,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:56:21,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-10-02 11:56:21,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:56:21,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:56:21,534 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-02 11:56:21,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:21,534 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:56:21,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:21,534 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:56:21,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:21,534 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:21,534 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:56:21,535 INFO L423 AbstractCegarLoop]: === Iteration 296 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:21,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:21,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1703255100, now seen corresponding path program 280 times [2018-10-02 11:56:21,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:21,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:21,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:21,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:21,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:21,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:21,608 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:21,615 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:56:21,622 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:56:21,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:21,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:21,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:21,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:21,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:21,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:21,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:21,646 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-02 11:56:22,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:22,214 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-02 11:56:22,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:22,214 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:22,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:22,215 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:56:22,215 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:56:22,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:22,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:56:22,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-02 11:56:22,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:22,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:22,558 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:22,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:22,558 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:22,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:22,558 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:22,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:22,558 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:22,558 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:22,558 INFO L423 AbstractCegarLoop]: === Iteration 297 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:22,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:22,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1703257022, now seen corresponding path program 281 times [2018-10-02 11:56:22,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:22,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:22,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:22,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:22,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:22,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:22,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:22,632 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:56:22,644 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-02 11:56:22,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:22,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:22,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:22,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:22,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:22,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:22,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:22,669 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:23,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:23,249 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-02 11:56:23,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:23,249 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:23,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:23,250 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:56:23,250 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:56:23,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:23,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:56:23,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-02 11:56:23,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:56:23,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:56:23,584 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:56:23,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:23,584 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:56:23,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:23,584 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:56:23,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:23,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:23,584 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:23,585 INFO L423 AbstractCegarLoop]: === Iteration 298 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:23,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:23,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1705102142, now seen corresponding path program 282 times [2018-10-02 11:56:23,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:23,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:23,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:23,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:23,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:23,657 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:23,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:23,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:23,665 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:56:23,675 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-02 11:56:23,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:23,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:23,707 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:23,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:23,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:23,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:23,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:23,708 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:56:24,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:24,791 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-02 11:56:24,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:24,791 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:24,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:24,792 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:56:24,792 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:56:24,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:24,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:56:25,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-02 11:56:25,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:25,098 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:25,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:25,098 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:25,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:25,099 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:25,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:25,099 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:25,099 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:56:25,099 INFO L423 AbstractCegarLoop]: === Iteration 299 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:25,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:25,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1705104064, now seen corresponding path program 283 times [2018-10-02 11:56:25,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:25,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:25,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:25,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:25,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:25,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:25,168 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:25,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:25,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:25,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:25,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:25,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:25,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:25,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:25,206 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:25,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:25,800 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-02 11:56:25,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:25,800 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:25,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:25,801 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:56:25,801 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:56:25,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:25,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:56:26,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-02 11:56:26,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:56:26,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:56:26,227 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-02 11:56:26,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:26,227 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:56:26,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:26,227 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:56:26,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:26,227 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:26,228 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:26,228 INFO L423 AbstractCegarLoop]: === Iteration 300 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:26,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:26,228 INFO L82 PathProgramCache]: Analyzing trace with hash -816704834, now seen corresponding path program 284 times [2018-10-02 11:56:26,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:26,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:26,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:26,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:26,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:26,303 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:26,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:26,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:26,309 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:56:26,316 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:56:26,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:26,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:26,337 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:26,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:26,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:26,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:26,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:26,338 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-02 11:56:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:26,894 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:56:26,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:26,894 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:26,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:26,895 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:56:26,895 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:56:26,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:26,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:56:27,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-02 11:56:27,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:27,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:27,235 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:27,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:27,235 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:27,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:27,235 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:27,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:27,235 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:27,235 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:56:27,235 INFO L423 AbstractCegarLoop]: === Iteration 301 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:27,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:27,236 INFO L82 PathProgramCache]: Analyzing trace with hash -816702912, now seen corresponding path program 285 times [2018-10-02 11:56:27,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:27,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:27,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:27,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:27,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:27,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:27,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:27,310 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:27,318 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:56:27,333 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:56:27,334 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:27,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:27,336 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:27,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:27,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:27,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:27,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:27,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:27,356 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:27,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:27,926 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:56:27,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:27,926 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:27,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:27,927 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:56:27,927 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:56:27,927 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:27,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:56:28,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-02 11:56:28,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:56:28,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:56:28,260 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:56:28,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:28,260 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:56:28,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:28,260 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:56:28,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:28,260 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:28,260 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:56:28,260 INFO L423 AbstractCegarLoop]: === Iteration 302 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:28,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:28,261 INFO L82 PathProgramCache]: Analyzing trace with hash -814857792, now seen corresponding path program 286 times [2018-10-02 11:56:28,261 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:28,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:28,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:28,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:28,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:28,329 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:28,329 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:28,338 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:56:28,345 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:56:28,345 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:28,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:28,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:28,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:28,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:28,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:28,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:28,369 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:56:28,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:28,903 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:56:28,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:28,903 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:28,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:28,904 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:56:28,904 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:56:28,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:28,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:56:29,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-02 11:56:29,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:29,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:29,244 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:29,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:29,244 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:29,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:29,245 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:29,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:29,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:29,245 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:29,245 INFO L423 AbstractCegarLoop]: === Iteration 303 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:29,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:29,245 INFO L82 PathProgramCache]: Analyzing trace with hash -814855870, now seen corresponding path program 287 times [2018-10-02 11:56:29,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:29,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:29,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:29,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:29,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:29,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:29,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:29,320 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:56:29,329 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-02 11:56:29,329 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:29,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:29,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:29,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:29,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:29,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:29,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:29,353 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:29,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:29,860 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:56:29,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:29,860 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:29,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:29,861 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:56:29,861 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:56:29,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:29,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:56:30,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-10-02 11:56:30,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:56:30,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:56:30,093 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-10-02 11:56:30,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:30,094 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:56:30,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:30,094 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:56:30,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:30,094 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:30,094 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:56:30,094 INFO L423 AbstractCegarLoop]: === Iteration 304 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:30,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:30,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1724261308, now seen corresponding path program 288 times [2018-10-02 11:56:30,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:30,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:30,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:30,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:30,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:30,163 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:30,163 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:30,172 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:56:30,182 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-02 11:56:30,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:30,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:30,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:30,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:30,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:30,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:30,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:30,207 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-10-02 11:56:30,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:30,730 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:56:30,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:30,730 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:30,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:30,731 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:56:30,731 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:56:30,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:30,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:56:31,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-02 11:56:31,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:31,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:31,044 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:31,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:31,044 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:31,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:31,044 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:31,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:31,044 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:31,045 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:31,045 INFO L423 AbstractCegarLoop]: === Iteration 305 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:31,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:31,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1724263230, now seen corresponding path program 289 times [2018-10-02 11:56:31,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:31,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:31,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:31,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:31,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:31,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:31,111 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:31,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:31,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:31,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:31,130 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:31,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:31,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:31,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:31,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:31,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:31,151 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:31,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:31,691 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:56:31,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:31,691 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:31,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:31,691 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:56:31,691 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:56:31,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:31,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:56:32,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-02 11:56:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:56:32,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:56:32,008 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:56:32,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:32,008 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:56:32,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:32,008 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:56:32,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:32,009 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:32,009 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:32,009 INFO L423 AbstractCegarLoop]: === Iteration 306 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:32,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:32,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1726108350, now seen corresponding path program 290 times [2018-10-02 11:56:32,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:32,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:32,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:32,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:32,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:32,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:32,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:32,091 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:56:32,097 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:56:32,097 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:32,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:32,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:32,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:32,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:32,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:32,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:32,122 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:56:32,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:32,632 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:56:32,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:32,632 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:32,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:32,633 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:56:32,633 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:56:32,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:32,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:56:32,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-10-02 11:56:32,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:32,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:32,950 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:32,950 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:32,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:32,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:32,950 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:32,950 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:56:32,951 INFO L423 AbstractCegarLoop]: === Iteration 307 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:32,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:32,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1726110272, now seen corresponding path program 291 times [2018-10-02 11:56:32,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:32,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:32,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:32,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:32,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:32,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:33,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:33,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:33,028 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:56:33,038 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:56:33,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:33,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:33,061 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:33,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:33,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:33,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:33,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:33,062 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:33,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:33,560 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:56:33,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:33,560 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:33,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:33,560 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:56:33,560 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:56:33,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:33,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:56:33,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-02 11:56:33,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:56:33,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:56:33,881 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-02 11:56:33,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:33,881 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:56:33,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:33,881 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:56:33,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:33,882 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:33,882 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:33,882 INFO L423 AbstractCegarLoop]: === Iteration 308 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:33,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:33,882 INFO L82 PathProgramCache]: Analyzing trace with hash -795698626, now seen corresponding path program 292 times [2018-10-02 11:56:33,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:33,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:33,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:33,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:33,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:33,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:33,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:33,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:33,960 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:56:33,970 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:56:33,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:33,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:33,973 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:34,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:34,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:34,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:34,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:34,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:34,004 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-02 11:56:34,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:34,598 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:56:34,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:34,598 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:34,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:34,598 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:56:34,598 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:56:34,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:34,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:56:34,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-02 11:56:34,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:34,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:34,923 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:34,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:34,923 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:34,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:34,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:34,923 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:34,923 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:56:34,923 INFO L423 AbstractCegarLoop]: === Iteration 309 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:34,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:34,924 INFO L82 PathProgramCache]: Analyzing trace with hash -795696704, now seen corresponding path program 293 times [2018-10-02 11:56:34,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:34,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:34,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:34,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:34,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:34,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:34,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:34,999 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:56:35,010 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-02 11:56:35,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:35,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:35,014 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:35,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:35,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:35,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:35,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:35,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:35,045 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:35,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:35,600 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:56:35,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:35,600 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:35,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:35,601 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:56:35,601 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:56:35,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:35,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:56:35,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-02 11:56:35,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:56:35,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:56:35,913 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:56:35,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:35,913 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:56:35,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:35,913 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:56:35,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:35,913 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:35,913 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:56:35,913 INFO L423 AbstractCegarLoop]: === Iteration 310 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:35,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:35,914 INFO L82 PathProgramCache]: Analyzing trace with hash -793851584, now seen corresponding path program 294 times [2018-10-02 11:56:35,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:35,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:35,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:35,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:35,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:35,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:35,981 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:35,989 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:56:36,002 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-02 11:56:36,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:36,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:36,026 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:36,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:36,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:36,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:36,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:36,027 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:56:36,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:36,539 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:56:36,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:36,539 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:36,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:36,539 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:56:36,540 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:56:36,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:36,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:56:36,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-10-02 11:56:36,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:36,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:36,876 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:36,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:36,876 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:36,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:36,876 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:36,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:36,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:36,877 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:36,877 INFO L423 AbstractCegarLoop]: === Iteration 311 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:36,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:36,877 INFO L82 PathProgramCache]: Analyzing trace with hash -793849662, now seen corresponding path program 295 times [2018-10-02 11:56:36,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:36,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:36,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:36,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:36,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:36,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:36,946 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:36,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:36,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:36,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:36,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:36,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:36,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:36,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:36,985 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:37,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:37,450 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:56:37,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:37,450 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:37,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:37,450 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:56:37,451 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:56:37,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:37,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:56:37,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-02 11:56:37,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:56:37,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:56:37,725 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-02 11:56:37,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:37,725 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:56:37,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:37,725 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:56:37,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:37,725 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:37,725 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:37,725 INFO L423 AbstractCegarLoop]: === Iteration 312 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:37,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:37,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1890647618, now seen corresponding path program 296 times [2018-10-02 11:56:37,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:37,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:37,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:37,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:37,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:37,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:37,791 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:37,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:37,791 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:37,800 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:56:37,806 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:56:37,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:37,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:37,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:37,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:37,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:37,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:37,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:37,832 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-02 11:56:38,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:38,314 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:56:38,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:38,314 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:38,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:38,315 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:56:38,315 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:56:38,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:38,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:56:38,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-10-02 11:56:38,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:38,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:38,644 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:38,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:38,644 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:38,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:38,644 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:38,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:38,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:38,644 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:56:38,645 INFO L423 AbstractCegarLoop]: === Iteration 313 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:38,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:38,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1890645696, now seen corresponding path program 297 times [2018-10-02 11:56:38,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:38,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:38,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:38,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:38,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:38,804 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:38,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:38,804 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:38,813 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:56:38,823 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:56:38,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:38,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:38,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:38,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:38,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:38,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:38,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:38,848 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:39,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:39,307 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-02 11:56:39,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:39,307 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:39,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:39,308 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:56:39,308 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:56:39,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:39,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:56:39,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-10-02 11:56:39,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:56:39,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:56:39,618 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:56:39,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:39,618 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:56:39,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:39,618 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:56:39,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:39,618 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:39,618 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:56:39,618 INFO L423 AbstractCegarLoop]: === Iteration 314 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:39,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:39,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1888800576, now seen corresponding path program 298 times [2018-10-02 11:56:39,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:39,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:39,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:39,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:39,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:39,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:39,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:39,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:39,937 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:56:39,944 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:56:39,944 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:39,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:39,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:39,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:39,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:39,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:39,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:39,967 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:56:40,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:40,431 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:56:40,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:40,431 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:40,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:40,432 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:56:40,432 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:56:40,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:40,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:56:40,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-10-02 11:56:40,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:40,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:40,768 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:40,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:40,768 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:40,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:40,768 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:40,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:40,768 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:40,769 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:40,769 INFO L423 AbstractCegarLoop]: === Iteration 315 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:40,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:40,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1888798654, now seen corresponding path program 299 times [2018-10-02 11:56:40,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:40,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:40,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:40,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:40,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:40,836 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:40,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:40,836 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:40,845 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:56:40,855 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-02 11:56:40,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:40,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:40,859 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:40,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:40,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:40,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:40,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:40,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:40,879 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:41,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:41,361 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-02 11:56:41,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:41,362 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:41,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:41,362 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:56:41,362 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:56:41,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:41,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:56:41,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-02 11:56:41,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:56:41,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:56:41,666 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-02 11:56:41,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:41,666 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:56:41,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:41,666 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:56:41,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:41,666 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:41,666 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:56:41,666 INFO L423 AbstractCegarLoop]: === Iteration 316 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:41,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:41,667 INFO L82 PathProgramCache]: Analyzing trace with hash -115640256, now seen corresponding path program 300 times [2018-10-02 11:56:41,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:41,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:41,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:41,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:41,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:41,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:41,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:41,742 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:56:41,755 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-02 11:56:41,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:41,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:41,759 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:41,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:41,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:41,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:41,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:41,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:41,785 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-02 11:56:42,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:42,221 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:56:42,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:42,221 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:42,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:42,221 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:56:42,221 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:56:42,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:42,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:56:42,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2018-10-02 11:56:42,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:42,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:42,567 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:42,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:42,567 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:42,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:42,567 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:42,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:42,567 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:42,567 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:42,567 INFO L423 AbstractCegarLoop]: === Iteration 317 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:42,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:42,567 INFO L82 PathProgramCache]: Analyzing trace with hash -115638334, now seen corresponding path program 301 times [2018-10-02 11:56:42,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:42,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:42,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:42,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:42,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:42,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:42,641 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:42,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:42,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:42,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:42,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:42,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:42,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:42,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:42,679 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:43,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:43,133 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:56:43,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:43,133 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:43,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:43,134 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:56:43,134 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:56:43,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:43,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:56:43,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-10-02 11:56:43,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:56:43,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:56:43,460 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:56:43,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:43,460 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:56:43,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:43,460 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:56:43,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:43,460 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:43,461 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:43,461 INFO L423 AbstractCegarLoop]: === Iteration 318 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:43,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:43,461 INFO L82 PathProgramCache]: Analyzing trace with hash -113793214, now seen corresponding path program 302 times [2018-10-02 11:56:43,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:43,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:43,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:43,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:43,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:43,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:43,534 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:43,542 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:56:43,549 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:56:43,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:43,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:43,553 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:43,573 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:43,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:43,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:43,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:43,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:43,574 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:56:44,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:44,001 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-02 11:56:44,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:44,001 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:44,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:44,002 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:56:44,002 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:56:44,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:44,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:56:44,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-10-02 11:56:44,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:44,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:44,330 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:44,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:44,330 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:44,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:44,330 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:44,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:44,330 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:44,330 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:56:44,330 INFO L423 AbstractCegarLoop]: === Iteration 319 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:44,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:44,331 INFO L82 PathProgramCache]: Analyzing trace with hash -113791292, now seen corresponding path program 303 times [2018-10-02 11:56:44,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:44,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:44,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:44,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:44,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:44,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:44,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:44,410 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:56:44,421 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:56:44,422 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:44,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:44,424 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:44,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:44,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:44,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:44,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:44,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:44,453 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:44,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:44,910 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2018-10-02 11:56:44,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:44,910 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:44,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:44,911 INFO L225 Difference]: With dead ends: 38 [2018-10-02 11:56:44,911 INFO L226 Difference]: Without dead ends: 36 [2018-10-02 11:56:44,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:44,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-02 11:56:45,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2018-10-02 11:56:45,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:56:45,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-02 11:56:45,111 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 19 [2018-10-02 11:56:45,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:45,111 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-02 11:56:45,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:45,111 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-02 11:56:45,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:45,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:45,111 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-02 11:56:45,111 INFO L423 AbstractCegarLoop]: === Iteration 320 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:45,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:45,112 INFO L82 PathProgramCache]: Analyzing trace with hash 330139066, now seen corresponding path program 304 times [2018-10-02 11:56:45,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:45,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:45,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:45,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:45,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:45,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:45,181 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:45,192 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:56:45,233 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:56:45,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:45,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:45,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:45,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:45,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:45,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:45,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:45,269 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 11 states. [2018-10-02 11:56:46,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:46,202 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-02 11:56:46,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:46,202 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:46,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:46,203 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:56:46,203 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:56:46,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:46,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:56:46,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-02 11:56:46,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:46,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:46,608 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:46,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:46,608 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:46,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:46,608 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:46,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:46,608 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:46,609 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:56:46,609 INFO L423 AbstractCegarLoop]: === Iteration 321 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:46,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:46,609 INFO L82 PathProgramCache]: Analyzing trace with hash 330140988, now seen corresponding path program 305 times [2018-10-02 11:56:46,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:46,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:46,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:46,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:46,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:46,681 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:46,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:46,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:46,688 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:56:46,701 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-02 11:56:46,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:46,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:46,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:46,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:46,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:46,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:46,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:46,725 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:47,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:47,506 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-02 11:56:47,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:47,506 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:47,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:47,507 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:56:47,507 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:56:47,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:47,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:56:47,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-02 11:56:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:56:47,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:56:47,858 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:56:47,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:47,858 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:56:47,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:47,858 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:56:47,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:47,859 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:47,859 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:56:47,859 INFO L423 AbstractCegarLoop]: === Iteration 322 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:47,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:47,859 INFO L82 PathProgramCache]: Analyzing trace with hash 331986108, now seen corresponding path program 306 times [2018-10-02 11:56:47,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:47,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:47,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:47,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:47,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:47,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:47,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:47,947 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:56:47,957 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-02 11:56:47,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:47,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:47,960 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:47,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:47,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:47,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:47,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:47,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:47,981 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:56:48,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:48,719 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-02 11:56:48,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:48,719 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:48,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:48,719 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:56:48,719 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:56:48,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:48,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:56:49,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-02 11:56:49,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:49,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:49,077 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:49,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:49,077 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:49,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:49,078 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:49,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:49,078 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:49,078 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:49,078 INFO L423 AbstractCegarLoop]: === Iteration 323 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:49,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:49,078 INFO L82 PathProgramCache]: Analyzing trace with hash 331988030, now seen corresponding path program 307 times [2018-10-02 11:56:49,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:49,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:49,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:49,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:49,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:49,141 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:49,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:49,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:49,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:49,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:49,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:49,157 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:49,177 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:49,177 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:49,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:49,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:49,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:49,178 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:49,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:49,919 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-02 11:56:49,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:49,919 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:49,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:49,920 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:56:49,920 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:56:49,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:49,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:56:50,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-10-02 11:56:50,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:56:50,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:56:50,293 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-02 11:56:50,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:50,293 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:56:50,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:50,293 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:56:50,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:50,293 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:50,294 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:56:50,294 INFO L423 AbstractCegarLoop]: === Iteration 324 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:50,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:50,294 INFO L82 PathProgramCache]: Analyzing trace with hash 2105146428, now seen corresponding path program 308 times [2018-10-02 11:56:50,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:50,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:50,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:50,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:50,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:50,363 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:50,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:50,371 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:56:50,377 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:56:50,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:50,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:50,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:50,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:50,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:50,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:50,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:50,402 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-02 11:56:51,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:51,182 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-02 11:56:51,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:51,182 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:51,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:51,183 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:56:51,183 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:56:51,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:51,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:56:51,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-02 11:56:51,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:51,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:51,720 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:51,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:51,720 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:51,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:51,720 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:51,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:51,720 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:51,721 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:51,721 INFO L423 AbstractCegarLoop]: === Iteration 325 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:51,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:51,721 INFO L82 PathProgramCache]: Analyzing trace with hash 2105148350, now seen corresponding path program 309 times [2018-10-02 11:56:51,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:51,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:51,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:51,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:51,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:51,781 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:51,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:51,781 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:51,789 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:56:51,799 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:56:51,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:51,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:51,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:51,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:51,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:51,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:51,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:51,827 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:52,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:52,608 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-02 11:56:52,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:52,608 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:52,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:52,608 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:56:52,608 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:56:52,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:52,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:56:52,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-02 11:56:52,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:56:52,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:56:52,967 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:56:52,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:52,968 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:56:52,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:52,968 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:56:52,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:52,968 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:52,968 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:52,968 INFO L423 AbstractCegarLoop]: === Iteration 326 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:52,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:52,968 INFO L82 PathProgramCache]: Analyzing trace with hash 2106993470, now seen corresponding path program 310 times [2018-10-02 11:56:52,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:52,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:52,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:52,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:52,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:53,061 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:53,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:53,061 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:53,069 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:56:53,074 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:56:53,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:53,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:53,096 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:53,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:53,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:53,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:53,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:53,097 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:56:53,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:53,862 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-02 11:56:53,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:53,862 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:53,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:53,863 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:56:53,863 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:56:53,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:53,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:56:54,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-02 11:56:54,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:54,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:54,233 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:54,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:54,233 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:54,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:54,233 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:54,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:54,233 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:54,233 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:56:54,233 INFO L423 AbstractCegarLoop]: === Iteration 327 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:54,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:54,234 INFO L82 PathProgramCache]: Analyzing trace with hash 2106995392, now seen corresponding path program 311 times [2018-10-02 11:56:54,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:54,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:54,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:54,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:54,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:54,316 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:54,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:54,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:54,324 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:56:54,334 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-02 11:56:54,334 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:54,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:54,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:54,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:54,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:54,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:54,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:54,368 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:55,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:55,261 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-02 11:56:55,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:55,261 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:55,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:55,262 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:56:55,262 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:56:55,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:55,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:56:55,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-10-02 11:56:55,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:56:55,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:56:55,600 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-02 11:56:55,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:55,601 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:56:55,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:55,601 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:56:55,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:55,601 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:55,601 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:56:55,601 INFO L423 AbstractCegarLoop]: === Iteration 328 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:55,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:55,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1010197436, now seen corresponding path program 312 times [2018-10-02 11:56:55,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:55,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:55,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:55,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:55,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:55,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:55,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:55,699 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:56:55,715 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-02 11:56:55,716 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:55,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:55,739 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:55,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:55,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:55,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:55,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:55,740 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-02 11:56:56,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:56,484 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-02 11:56:56,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:56,484 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:56,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:56,485 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:56:56,485 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:56:56,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:56,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:56:56,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-02 11:56:56,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:56,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:56,877 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:56,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:56,877 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:56,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:56,877 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:56,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:56,878 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:56,878 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:56,878 INFO L423 AbstractCegarLoop]: === Iteration 329 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:56,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:56,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1010199358, now seen corresponding path program 313 times [2018-10-02 11:56:56,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:56,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:56,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:56,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:56,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:56,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:56,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:56,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:56,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:56,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:56,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:56,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:56,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:56,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:56,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:56,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:56,987 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:56:57,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:57,678 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-02 11:56:57,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:57,679 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:57,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:57,679 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:56:57,679 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:56:57,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:57,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:56:58,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-02 11:56:58,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:56:58,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:56:58,051 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:56:58,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:58,052 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:56:58,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:58,052 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:56:58,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:58,052 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:58,052 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:56:58,052 INFO L423 AbstractCegarLoop]: === Iteration 330 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:58,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:58,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1012044478, now seen corresponding path program 314 times [2018-10-02 11:56:58,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:58,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:58,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:58,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:58,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:58,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:58,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:58,118 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:58,126 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:56:58,131 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:56:58,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:58,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:58,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:58,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:58,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:58,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:58,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:58,154 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:56:58,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:58,882 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-02 11:56:58,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:56:58,882 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:56:58,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:58,883 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:56:58,883 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:56:58,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:58,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:56:59,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-02 11:56:59,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:56:59,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:56:59,249 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:56:59,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:59,249 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:56:59,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:56:59,249 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:56:59,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:56:59,249 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:59,249 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:56:59,250 INFO L423 AbstractCegarLoop]: === Iteration 331 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:59,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:59,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1012046400, now seen corresponding path program 315 times [2018-10-02 11:56:59,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:59,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:59,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:59,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:59,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:59,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:59,322 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:59,331 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:56:59,340 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:56:59,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:59,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:59,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:59,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:56:59,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:56:59,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:56:59,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:56:59,364 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:57:00,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:00,051 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-02 11:57:00,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:00,051 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:00,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:00,052 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:57:00,052 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:57:00,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:00,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:57:00,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-10-02 11:57:00,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:57:00,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:57:00,388 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-02 11:57:00,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:00,388 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:57:00,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:00,388 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:57:00,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:00,389 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:00,389 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:57:00,389 INFO L423 AbstractCegarLoop]: === Iteration 332 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:00,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:00,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1509762498, now seen corresponding path program 316 times [2018-10-02 11:57:00,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:00,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:00,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:00,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:00,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:00,458 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:00,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:00,467 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:57:00,474 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:57:00,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:00,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:00,477 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:00,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:00,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:00,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:00,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:00,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:00,497 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-02 11:57:01,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:01,170 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-02 11:57:01,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:01,170 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:01,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:01,171 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:57:01,171 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:57:01,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:01,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:57:01,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-10-02 11:57:01,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:01,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:57:01,552 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:57:01,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:01,552 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:57:01,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:01,552 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:57:01,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:01,552 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:01,553 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:57:01,553 INFO L423 AbstractCegarLoop]: === Iteration 333 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:01,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:01,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1509760576, now seen corresponding path program 317 times [2018-10-02 11:57:01,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:01,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:01,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:01,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:01,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:01,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:01,622 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:01,629 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:57:01,640 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-02 11:57:01,640 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:01,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:01,643 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:01,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:01,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:01,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:01,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:01,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:01,664 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:57:02,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:02,345 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-02 11:57:02,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:02,345 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:02,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:02,346 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:57:02,346 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:57:02,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:02,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:57:02,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-02 11:57:02,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:57:02,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:57:02,734 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:57:02,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:02,735 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:57:02,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:02,735 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:57:02,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:02,735 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:02,735 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:57:02,735 INFO L423 AbstractCegarLoop]: === Iteration 334 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:02,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:02,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1507915456, now seen corresponding path program 318 times [2018-10-02 11:57:02,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:02,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:02,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:02,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:02,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:02,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:02,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:02,860 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:57:02,871 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-02 11:57:02,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:02,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:02,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:02,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:02,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:02,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:02,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:02,894 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:57:03,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:03,542 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:57:03,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:03,542 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:03,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:03,543 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:57:03,543 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:57:03,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:03,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:57:03,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-02 11:57:03,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:03,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:57:03,911 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:57:03,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:03,911 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:57:03,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:03,911 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:57:03,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:03,912 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:03,912 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:57:03,912 INFO L423 AbstractCegarLoop]: === Iteration 335 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:03,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:03,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1507913534, now seen corresponding path program 319 times [2018-10-02 11:57:03,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:03,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:03,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:03,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:03,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:03,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:03,981 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:03,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:03,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:04,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:04,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:04,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:04,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:04,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:04,030 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:57:04,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:04,696 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:57:04,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:04,696 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:04,697 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:57:04,697 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:57:04,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:04,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:57:05,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-10-02 11:57:05,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:57:05,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:57:05,008 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-10-02 11:57:05,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:05,008 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:57:05,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:05,009 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:57:05,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:05,009 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:05,009 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:57:05,009 INFO L423 AbstractCegarLoop]: === Iteration 336 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:05,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:05,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1031203644, now seen corresponding path program 320 times [2018-10-02 11:57:05,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:05,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:05,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:05,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:05,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:05,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:05,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:05,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:05,097 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:57:05,110 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:57:05,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:05,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:05,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:05,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:05,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:05,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:05,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:05,133 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-10-02 11:57:05,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:05,939 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-02 11:57:05,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:05,939 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:05,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:05,940 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:57:05,940 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:57:05,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:05,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:57:06,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-02 11:57:06,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:06,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:57:06,335 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:57:06,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:06,335 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:57:06,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:06,335 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:57:06,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:06,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:06,335 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:57:06,336 INFO L423 AbstractCegarLoop]: === Iteration 337 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:06,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:06,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1031205566, now seen corresponding path program 321 times [2018-10-02 11:57:06,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:06,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:06,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:06,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:06,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:06,403 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:06,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:06,403 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:06,411 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:57:06,420 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:57:06,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:06,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:06,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:06,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:06,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:06,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:06,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:06,446 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:57:07,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:07,261 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-02 11:57:07,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:07,261 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:07,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:07,262 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:57:07,262 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:57:07,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:07,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:57:07,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-02 11:57:07,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:57:07,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:57:07,643 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:57:07,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:07,643 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:57:07,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:07,643 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:57:07,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:07,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:07,644 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:57:07,644 INFO L423 AbstractCegarLoop]: === Iteration 338 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:07,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:07,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1033050686, now seen corresponding path program 322 times [2018-10-02 11:57:07,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:07,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:07,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:07,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:07,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:07,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:07,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:07,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:07,743 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:57:07,749 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:57:07,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:07,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:07,753 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:07,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:07,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:07,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:07,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:07,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:07,774 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:57:08,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:08,562 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-02 11:57:08,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:08,562 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:08,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:08,563 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:57:08,563 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:57:08,563 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:08,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:57:08,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-02 11:57:08,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:08,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:57:08,960 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:57:08,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:08,960 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:57:08,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:08,960 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:57:08,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:08,960 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:08,960 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:57:08,960 INFO L423 AbstractCegarLoop]: === Iteration 339 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:08,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:08,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1033052608, now seen corresponding path program 323 times [2018-10-02 11:57:08,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:08,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:08,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:08,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:08,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:08,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:09,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:09,027 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:09,035 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:57:09,046 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-02 11:57:09,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:09,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:09,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:09,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:09,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:09,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:09,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:09,070 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:57:09,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:09,804 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-02 11:57:09,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:09,804 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:09,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:09,805 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:57:09,805 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:57:09,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:09,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:57:10,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-10-02 11:57:10,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:57:10,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:57:10,188 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-02 11:57:10,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:10,188 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:57:10,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:10,188 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:57:10,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:10,189 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:10,189 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:57:10,189 INFO L423 AbstractCegarLoop]: === Iteration 340 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:10,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:10,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1488756290, now seen corresponding path program 324 times [2018-10-02 11:57:10,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:10,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:10,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:10,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:10,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:10,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:10,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:10,271 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:57:10,301 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-02 11:57:10,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:10,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:10,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:10,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:10,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:10,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:10,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:10,325 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-02 11:57:11,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:11,169 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-02 11:57:11,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:11,169 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:11,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:11,170 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:57:11,170 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:57:11,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:11,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:57:11,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-02 11:57:11,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:11,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:57:11,555 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:57:11,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:11,555 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:57:11,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:11,555 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:57:11,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:11,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:11,556 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:57:11,556 INFO L423 AbstractCegarLoop]: === Iteration 341 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:11,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:11,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1488754368, now seen corresponding path program 325 times [2018-10-02 11:57:11,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:11,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:11,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:11,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:11,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:11,625 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:11,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:11,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:11,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:11,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:11,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:11,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:11,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:11,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:11,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:11,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:11,664 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:57:12,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:12,499 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-02 11:57:12,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:12,499 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:12,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:12,500 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:57:12,500 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:57:12,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:12,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:57:12,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-02 11:57:12,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:57:12,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:57:12,892 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:57:12,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:12,893 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:57:12,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:12,893 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:57:12,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:12,893 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:12,893 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:57:12,893 INFO L423 AbstractCegarLoop]: === Iteration 342 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:12,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:12,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1486909248, now seen corresponding path program 326 times [2018-10-02 11:57:12,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:12,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:12,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:12,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:12,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:13,046 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:13,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:13,053 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:57:13,066 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:57:13,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:13,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:13,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:13,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:13,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:13,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:13,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:13,089 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:57:13,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:13,839 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-02 11:57:13,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:13,839 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:13,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:13,840 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:57:13,840 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:57:13,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:13,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:57:14,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-02 11:57:14,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:14,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:57:14,229 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:57:14,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:14,229 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:57:14,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:14,229 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:57:14,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:14,229 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:14,229 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:57:14,229 INFO L423 AbstractCegarLoop]: === Iteration 343 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:14,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:14,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1486907326, now seen corresponding path program 327 times [2018-10-02 11:57:14,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:14,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:14,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:14,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:14,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:14,309 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:14,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:14,310 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:14,316 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:57:14,326 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:57:14,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:14,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:14,330 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:14,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:14,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:14,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:14,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:14,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:14,355 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:57:15,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:15,086 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-02 11:57:15,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:15,086 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:15,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:15,087 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:57:15,087 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:57:15,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:15,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:57:15,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-10-02 11:57:15,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:57:15,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:57:15,412 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-02 11:57:15,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:15,412 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:57:15,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:15,412 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:57:15,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:15,412 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:15,412 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:57:15,413 INFO L423 AbstractCegarLoop]: === Iteration 344 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:15,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:15,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1711262014, now seen corresponding path program 328 times [2018-10-02 11:57:15,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:15,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:15,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:15,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:15,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:15,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:15,721 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:15,729 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:57:15,735 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:57:15,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:15,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:15,739 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:15,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:15,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:15,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:15,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:15,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:15,762 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-02 11:57:16,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:16,512 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-02 11:57:16,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:16,512 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:16,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:16,513 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:57:16,513 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:57:16,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:16,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:57:16,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-02 11:57:16,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:16,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:57:16,910 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:57:16,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:16,911 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:57:16,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:16,911 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:57:16,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:16,911 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:16,911 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:57:16,911 INFO L423 AbstractCegarLoop]: === Iteration 345 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:16,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:16,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1711263936, now seen corresponding path program 329 times [2018-10-02 11:57:16,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:16,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:16,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:16,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:16,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:16,979 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:16,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:16,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:16,986 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:57:16,997 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-02 11:57:16,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:16,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:17,001 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:17,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:17,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:17,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:17,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:17,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:17,022 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:57:17,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:17,761 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-02 11:57:17,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:17,761 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:17,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:17,762 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:57:17,762 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:57:17,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:17,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:57:18,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-02 11:57:18,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:57:18,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:57:18,153 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:57:18,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:18,153 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:57:18,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:18,153 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:57:18,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:18,154 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:18,154 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:57:18,154 INFO L423 AbstractCegarLoop]: === Iteration 346 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:18,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:18,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1713109056, now seen corresponding path program 330 times [2018-10-02 11:57:18,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:18,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:18,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:18,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:18,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:18,302 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:18,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:18,302 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:18,311 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:57:18,322 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-02 11:57:18,322 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:18,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:18,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:18,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:18,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:18,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:18,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:18,345 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:57:19,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:19,095 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-02 11:57:19,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:19,095 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:19,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:19,096 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:57:19,096 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:57:19,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:19,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:57:19,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-02 11:57:19,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:19,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:57:19,504 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:57:19,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:19,504 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:57:19,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:19,504 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:57:19,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:19,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:19,504 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:57:19,504 INFO L423 AbstractCegarLoop]: === Iteration 347 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:19,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:19,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1713110978, now seen corresponding path program 331 times [2018-10-02 11:57:19,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:19,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:19,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:19,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:19,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:19,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:19,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:19,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:19,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:19,732 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:19,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:19,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:19,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:19,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:19,733 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:57:20,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:20,440 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-02 11:57:20,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:20,440 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:20,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:20,441 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:57:20,441 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:57:20,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:20,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:57:20,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-10-02 11:57:20,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:57:20,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:57:20,813 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-02 11:57:20,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:20,813 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:57:20,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:20,813 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:57:20,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:20,813 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:20,813 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:57:20,814 INFO L423 AbstractCegarLoop]: === Iteration 348 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:20,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:20,814 INFO L82 PathProgramCache]: Analyzing trace with hash -808697920, now seen corresponding path program 332 times [2018-10-02 11:57:20,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:20,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:20,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:20,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:20,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:20,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:20,882 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:20,890 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:57:20,895 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:57:20,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:20,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:20,918 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:20,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:20,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:20,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:20,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:20,918 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-02 11:57:21,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:21,600 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-02 11:57:21,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:21,600 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:21,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:21,600 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:57:21,600 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:57:21,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:21,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:57:22,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-10-02 11:57:22,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:22,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:57:22,004 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:57:22,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:22,004 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:57:22,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:22,004 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:57:22,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:22,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:22,005 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:57:22,005 INFO L423 AbstractCegarLoop]: === Iteration 349 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:22,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:22,005 INFO L82 PathProgramCache]: Analyzing trace with hash -808695998, now seen corresponding path program 333 times [2018-10-02 11:57:22,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:22,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:22,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:22,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:22,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:22,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:22,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:22,080 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:57:22,090 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:57:22,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:22,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:22,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:22,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:22,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:22,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:22,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:22,124 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:57:22,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:22,817 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-02 11:57:22,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:22,817 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:22,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:22,818 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:57:22,818 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:57:22,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:22,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:57:23,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-02 11:57:23,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:57:23,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:57:23,212 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:57:23,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:23,212 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:57:23,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:23,212 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:57:23,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:23,212 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:23,213 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:57:23,213 INFO L423 AbstractCegarLoop]: === Iteration 350 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:23,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:23,213 INFO L82 PathProgramCache]: Analyzing trace with hash -806850878, now seen corresponding path program 334 times [2018-10-02 11:57:23,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:23,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:23,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:23,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:23,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:23,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:23,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:23,322 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:57:23,328 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:57:23,329 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:23,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:23,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:23,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:23,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:23,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:23,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:23,353 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:57:24,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:24,021 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:57:24,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:24,021 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:24,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:24,022 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:57:24,022 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:57:24,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:24,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:57:24,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-02 11:57:24,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:24,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:57:24,411 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:57:24,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:24,411 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:57:24,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:24,411 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:57:24,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:24,411 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:24,411 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:57:24,411 INFO L423 AbstractCegarLoop]: === Iteration 351 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:24,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:24,412 INFO L82 PathProgramCache]: Analyzing trace with hash -806848956, now seen corresponding path program 335 times [2018-10-02 11:57:24,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:24,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:24,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:24,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:24,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:24,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:24,621 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:24,628 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:57:24,638 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-02 11:57:24,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:24,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:24,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:24,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:24,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:24,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:24,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:24,662 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:57:25,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:25,309 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:57:25,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:25,309 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:25,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:25,309 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:57:25,309 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:57:25,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:25,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:57:25,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2018-10-02 11:57:25,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:57:25,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-02 11:57:25,572 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2018-10-02 11:57:25,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:25,572 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-02 11:57:25,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:25,573 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-02 11:57:25,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:25,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:25,573 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:57:25,573 INFO L423 AbstractCegarLoop]: === Iteration 352 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:25,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:25,573 INFO L82 PathProgramCache]: Analyzing trace with hash -256666948, now seen corresponding path program 336 times [2018-10-02 11:57:25,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:25,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:25,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:25,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:25,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:25,648 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:25,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:25,649 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:25,657 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:57:25,668 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-02 11:57:25,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:25,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:25,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:25,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:25,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:25,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:25,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:25,694 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 11 states. [2018-10-02 11:57:26,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:26,472 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-02 11:57:26,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:26,472 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:26,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:26,473 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:57:26,473 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:57:26,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:26,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:57:26,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-02 11:57:26,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:26,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:57:26,888 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:57:26,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:26,888 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:57:26,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:26,888 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:57:26,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:26,888 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:26,888 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:57:26,888 INFO L423 AbstractCegarLoop]: === Iteration 353 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:26,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:26,888 INFO L82 PathProgramCache]: Analyzing trace with hash -256665026, now seen corresponding path program 337 times [2018-10-02 11:57:26,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:26,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:26,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:26,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:26,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:26,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:26,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:26,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:26,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:26,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:26,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:26,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:26,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:26,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:26,990 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:57:27,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:27,688 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-02 11:57:27,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:27,688 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:27,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:27,688 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:57:27,688 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:57:27,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:27,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:57:28,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-02 11:57:28,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:57:28,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:57:28,095 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:57:28,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:28,096 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:57:28,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:28,096 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:57:28,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:28,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:28,096 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:57:28,096 INFO L423 AbstractCegarLoop]: === Iteration 354 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:28,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:28,096 INFO L82 PathProgramCache]: Analyzing trace with hash -254819906, now seen corresponding path program 338 times [2018-10-02 11:57:28,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:28,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:28,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:28,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:28,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:28,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:28,199 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:28,212 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:57:28,219 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:57:28,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:28,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:28,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:28,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:28,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:28,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:28,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:28,244 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:57:28,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:28,975 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-02 11:57:28,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:28,975 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:28,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:28,976 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:57:28,976 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:57:28,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:28,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:57:29,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-02 11:57:29,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:29,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:57:29,386 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:57:29,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:29,386 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:57:29,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:29,386 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:57:29,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:29,387 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:29,387 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:57:29,387 INFO L423 AbstractCegarLoop]: === Iteration 355 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:29,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:29,387 INFO L82 PathProgramCache]: Analyzing trace with hash -254817984, now seen corresponding path program 339 times [2018-10-02 11:57:29,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:29,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:29,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:29,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:29,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:29,470 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:29,470 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:29,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:29,479 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:57:29,489 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:57:29,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:29,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:29,493 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:29,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:29,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:29,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:29,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:29,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:29,514 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:57:30,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:30,258 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-02 11:57:30,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:30,258 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:30,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:30,258 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:57:30,258 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:57:30,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:30,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:57:30,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-02 11:57:30,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:57:30,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:57:30,649 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-02 11:57:30,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:30,649 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:57:30,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:30,650 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:57:30,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:30,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:30,650 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:57:30,650 INFO L423 AbstractCegarLoop]: === Iteration 356 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:30,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:30,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1518340414, now seen corresponding path program 340 times [2018-10-02 11:57:30,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:30,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:30,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:30,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:30,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:30,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:30,718 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:30,729 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:57:30,742 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:57:30,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:30,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:30,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:30,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:30,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:30,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:30,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:30,765 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-02 11:57:31,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:31,457 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:57:31,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:31,457 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:31,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:31,458 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:57:31,458 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:57:31,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:31,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:57:31,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-02 11:57:31,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:31,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:57:31,883 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:57:31,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:31,883 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:57:31,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:31,883 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:57:31,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:31,883 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:31,883 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:57:31,883 INFO L423 AbstractCegarLoop]: === Iteration 357 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:31,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:31,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1518342336, now seen corresponding path program 341 times [2018-10-02 11:57:31,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:31,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:31,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:31,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:31,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:31,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:31,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:31,954 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:31,963 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:57:31,971 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-02 11:57:31,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:31,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:31,975 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:31,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:31,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:31,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:31,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:31,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:31,995 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:57:32,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:32,694 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:57:32,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:32,694 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:32,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:32,695 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:57:32,695 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:57:32,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:32,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:57:33,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-02 11:57:33,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:57:33,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:57:33,096 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:57:33,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:33,097 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:57:33,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:33,097 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:57:33,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:33,097 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:33,097 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:57:33,097 INFO L423 AbstractCegarLoop]: === Iteration 358 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:33,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:33,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1520187456, now seen corresponding path program 342 times [2018-10-02 11:57:33,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:33,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:33,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:33,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:33,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:33,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:33,171 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:33,179 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:57:33,192 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-02 11:57:33,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:33,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:33,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:33,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:33,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:33,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:33,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:33,216 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:57:33,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:33,851 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:57:33,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:33,851 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:33,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:33,852 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:57:33,852 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:57:33,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:33,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:57:34,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-02 11:57:34,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:34,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:57:34,280 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:57:34,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:34,280 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:57:34,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:34,280 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:57:34,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:34,281 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:34,281 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:57:34,281 INFO L423 AbstractCegarLoop]: === Iteration 359 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:34,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:34,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1520189378, now seen corresponding path program 343 times [2018-10-02 11:57:34,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:34,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:34,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:34,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:34,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:34,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:34,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:34,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:34,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:34,365 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:34,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:34,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:34,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:34,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:34,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:34,385 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:57:35,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:35,005 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:57:35,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:35,005 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:35,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:35,005 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:57:35,005 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:57:35,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:35,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:57:35,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-10-02 11:57:35,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:57:35,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:57:35,391 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-02 11:57:35,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:35,391 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:57:35,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:35,391 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:57:35,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:35,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:35,392 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:57:35,392 INFO L423 AbstractCegarLoop]: === Iteration 360 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:35,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:35,392 INFO L82 PathProgramCache]: Analyzing trace with hash 423391422, now seen corresponding path program 344 times [2018-10-02 11:57:35,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:35,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:35,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:35,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:35,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:35,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:35,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:35,460 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:35,468 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:57:35,475 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:57:35,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:35,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:35,479 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:35,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:35,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:35,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:35,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:35,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:35,500 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-02 11:57:36,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:36,249 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-02 11:57:36,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:36,249 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:36,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:36,249 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:57:36,249 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:57:36,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:36,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:57:36,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-02 11:57:36,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:36,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:57:36,690 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:57:36,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:36,691 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:57:36,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:36,691 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:57:36,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:36,691 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:36,691 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:57:36,691 INFO L423 AbstractCegarLoop]: === Iteration 361 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:36,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:36,691 INFO L82 PathProgramCache]: Analyzing trace with hash 423393344, now seen corresponding path program 345 times [2018-10-02 11:57:36,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:36,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:36,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:36,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:36,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:36,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:36,762 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:36,777 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:57:36,871 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:57:36,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:36,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:36,901 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:36,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:36,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:36,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:36,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:36,902 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:57:37,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:37,621 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-02 11:57:37,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:37,621 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:37,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:37,622 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:57:37,622 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:57:37,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:37,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:57:38,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-02 11:57:38,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:57:38,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:57:38,025 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:57:38,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:38,025 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:57:38,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:38,025 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:57:38,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:38,025 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:38,025 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:57:38,025 INFO L423 AbstractCegarLoop]: === Iteration 362 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:38,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:38,026 INFO L82 PathProgramCache]: Analyzing trace with hash 425238464, now seen corresponding path program 346 times [2018-10-02 11:57:38,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:38,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:38,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:38,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:38,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:38,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:38,106 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:38,114 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:57:38,120 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:57:38,120 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:38,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:38,122 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:38,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:38,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:38,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:38,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:38,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:38,152 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:57:38,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:38,932 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-02 11:57:38,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:38,932 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:38,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:38,932 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:57:38,932 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:57:38,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:38,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:57:39,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-02 11:57:39,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:39,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:57:39,388 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:57:39,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:39,388 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:57:39,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:39,388 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:57:39,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:39,388 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:39,389 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:57:39,389 INFO L423 AbstractCegarLoop]: === Iteration 363 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:39,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:39,389 INFO L82 PathProgramCache]: Analyzing trace with hash 425240386, now seen corresponding path program 347 times [2018-10-02 11:57:39,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:39,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:39,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:39,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:39,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:39,458 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:39,458 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:39,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:39,466 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:57:39,474 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-02 11:57:39,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:39,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:39,478 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:39,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:39,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:39,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:39,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:39,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:39,498 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:57:40,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:40,228 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-02 11:57:40,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:40,228 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:40,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:40,229 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:57:40,229 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:57:40,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:40,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:57:40,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-02 11:57:40,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:57:40,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:57:40,631 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-02 11:57:40,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:40,631 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:57:40,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:40,631 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:57:40,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:40,632 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:40,632 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:57:40,632 INFO L423 AbstractCegarLoop]: === Iteration 364 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:40,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:40,632 INFO L82 PathProgramCache]: Analyzing trace with hash -2096568512, now seen corresponding path program 348 times [2018-10-02 11:57:40,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:40,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:40,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:40,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:40,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:40,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:40,697 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:40,697 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:40,705 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:57:40,715 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-02 11:57:40,716 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:40,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:40,738 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:40,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:40,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:40,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:40,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:40,739 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-02 11:57:41,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:41,415 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:57:41,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:41,415 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:41,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:41,415 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:57:41,415 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:57:41,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:41,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:57:41,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-02 11:57:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:41,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:57:41,835 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:57:41,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:41,836 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:57:41,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:41,836 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:57:41,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:41,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:41,836 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:57:41,836 INFO L423 AbstractCegarLoop]: === Iteration 365 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:41,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:41,836 INFO L82 PathProgramCache]: Analyzing trace with hash -2096566590, now seen corresponding path program 349 times [2018-10-02 11:57:41,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:41,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:41,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:41,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:41,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:41,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:41,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:41,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:41,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:41,920 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:41,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:41,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:41,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:41,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:41,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:41,941 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:57:42,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:42,639 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-02 11:57:42,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:42,639 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:42,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:42,640 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:57:42,640 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:57:42,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:42,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:57:43,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-02 11:57:43,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:57:43,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:57:43,049 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:57:43,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:43,049 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:57:43,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:43,050 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:57:43,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:43,050 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:43,050 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:57:43,050 INFO L423 AbstractCegarLoop]: === Iteration 366 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:43,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:43,050 INFO L82 PathProgramCache]: Analyzing trace with hash -2094721470, now seen corresponding path program 350 times [2018-10-02 11:57:43,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:43,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:43,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:43,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:43,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:43,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:43,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:43,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:43,127 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:57:43,133 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:57:43,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:43,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:43,158 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:43,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:43,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:43,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:43,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:43,159 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:57:43,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:43,794 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:57:43,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:43,794 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:43,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:43,794 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:57:43,795 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:57:43,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:43,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:57:44,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-02 11:57:44,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:44,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:57:44,224 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:57:44,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:44,224 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:57:44,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:44,224 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:57:44,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:44,224 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:44,224 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:57:44,225 INFO L423 AbstractCegarLoop]: === Iteration 367 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:44,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:44,225 INFO L82 PathProgramCache]: Analyzing trace with hash -2094719548, now seen corresponding path program 351 times [2018-10-02 11:57:44,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:44,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:44,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:44,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:44,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:44,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:44,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:44,301 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:57:44,311 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:57:44,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:44,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:44,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:44,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:44,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:44,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:44,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:44,335 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:57:44,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:44,996 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:57:44,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:44,996 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:44,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:44,997 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:57:44,997 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:57:44,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:44,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:57:45,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-10-02 11:57:45,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:57:45,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-02 11:57:45,315 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-10-02 11:57:45,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:45,316 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-02 11:57:45,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:45,316 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-02 11:57:45,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:45,316 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:45,316 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:57:45,316 INFO L423 AbstractCegarLoop]: === Iteration 368 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:45,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:45,316 INFO L82 PathProgramCache]: Analyzing trace with hash 444397630, now seen corresponding path program 352 times [2018-10-02 11:57:45,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:45,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:45,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:45,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:45,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:45,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:45,387 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:45,395 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:57:45,402 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:57:45,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:45,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:45,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:45,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:45,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:45,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:45,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:45,430 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-10-02 11:57:46,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:46,094 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:57:46,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:46,094 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:46,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:46,094 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:57:46,094 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:57:46,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:46,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:57:46,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-02 11:57:46,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:46,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:57:46,518 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:57:46,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:46,518 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:57:46,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:46,518 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:57:46,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:46,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:46,518 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:57:46,519 INFO L423 AbstractCegarLoop]: === Iteration 369 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:46,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:46,519 INFO L82 PathProgramCache]: Analyzing trace with hash 444399552, now seen corresponding path program 353 times [2018-10-02 11:57:46,519 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:46,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:46,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:46,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:46,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:46,593 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:46,593 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:46,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:46,601 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:57:46,611 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-02 11:57:46,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:46,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:46,641 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:46,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:46,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:46,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:46,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:46,642 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:57:47,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:47,307 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:57:47,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:47,307 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:47,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:47,308 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:57:47,308 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:57:47,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:47,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:57:47,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-02 11:57:47,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:57:47,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:57:47,727 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:57:47,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:47,728 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:57:47,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:47,728 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:57:47,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:47,728 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:47,728 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:57:47,728 INFO L423 AbstractCegarLoop]: === Iteration 370 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:47,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:47,728 INFO L82 PathProgramCache]: Analyzing trace with hash 446244672, now seen corresponding path program 354 times [2018-10-02 11:57:47,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:47,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:47,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:47,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:47,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:47,795 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:47,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:47,795 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:47,804 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:57:47,815 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-02 11:57:47,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:47,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:47,838 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:47,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:47,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:47,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:47,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:47,839 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:57:48,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:48,475 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:57:48,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:48,475 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:48,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:48,476 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:57:48,476 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:57:48,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:48,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:57:48,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-10-02 11:57:48,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:48,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:57:48,899 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:57:48,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:48,899 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:57:48,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:48,900 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:57:48,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:48,900 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:48,900 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:57:48,900 INFO L423 AbstractCegarLoop]: === Iteration 371 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:48,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:48,900 INFO L82 PathProgramCache]: Analyzing trace with hash 446246594, now seen corresponding path program 355 times [2018-10-02 11:57:48,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:48,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:48,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:48,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:48,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:48,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:48,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:48,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:48,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:49,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:49,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:49,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:49,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:49,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:49,018 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:57:49,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:49,639 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:57:49,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:49,639 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:49,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:49,640 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:57:49,640 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:57:49,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:49,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:57:50,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-02 11:57:50,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:57:50,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:57:50,030 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-02 11:57:50,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:50,030 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:57:50,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:50,031 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:57:50,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:50,031 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:50,031 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:57:50,031 INFO L423 AbstractCegarLoop]: === Iteration 372 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:50,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:50,031 INFO L82 PathProgramCache]: Analyzing trace with hash -2075562304, now seen corresponding path program 356 times [2018-10-02 11:57:50,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:50,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:50,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:50,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:50,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:50,102 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:50,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:50,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:50,109 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:57:50,116 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:57:50,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:50,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:50,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:50,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:50,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:50,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:50,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:50,140 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-02 11:57:50,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:50,791 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:57:50,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:50,791 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:50,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:50,792 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:57:50,792 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:57:50,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:50,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:57:51,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-02 11:57:51,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:51,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:57:51,220 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:57:51,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:51,220 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:57:51,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:51,220 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:57:51,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:51,220 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:51,220 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:57:51,221 INFO L423 AbstractCegarLoop]: === Iteration 373 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:51,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:51,221 INFO L82 PathProgramCache]: Analyzing trace with hash -2075560382, now seen corresponding path program 357 times [2018-10-02 11:57:51,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:51,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:51,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:51,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:51,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:51,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:51,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:51,301 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:57:51,311 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:57:51,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:51,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:51,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:51,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:51,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:51,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:51,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:51,336 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:57:51,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:51,988 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-02 11:57:51,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:51,988 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:51,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:51,989 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:57:51,989 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:57:51,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:51,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:57:52,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-02 11:57:52,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:57:52,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:57:52,412 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:57:52,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:52,412 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:57:52,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:52,412 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:57:52,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:52,412 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:52,412 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:57:52,413 INFO L423 AbstractCegarLoop]: === Iteration 374 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:52,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:52,413 INFO L82 PathProgramCache]: Analyzing trace with hash -2073715262, now seen corresponding path program 358 times [2018-10-02 11:57:52,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:52,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:52,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:52,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:52,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:52,483 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:52,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:52,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:52,492 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:57:52,499 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:57:52,499 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:52,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:52,501 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:52,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:52,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:52,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:52,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:52,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:52,522 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:57:53,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:53,156 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-02 11:57:53,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:53,156 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:53,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:53,157 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:57:53,157 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:57:53,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:53,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:57:53,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-10-02 11:57:53,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:53,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:57:53,598 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:57:53,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:53,599 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:57:53,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:53,599 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:57:53,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:53,599 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:53,599 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:57:53,599 INFO L423 AbstractCegarLoop]: === Iteration 375 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:53,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:53,599 INFO L82 PathProgramCache]: Analyzing trace with hash -2073713340, now seen corresponding path program 359 times [2018-10-02 11:57:53,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:53,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:53,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:53,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:53,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:53,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:53,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:53,668 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:53,675 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:57:53,685 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-02 11:57:53,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:53,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:53,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:53,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:53,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:53,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:53,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:53,709 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:57:54,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:54,308 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:57:54,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:54,308 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:54,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:54,309 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:57:54,309 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:57:54,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:54,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:57:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-02 11:57:54,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:57:54,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-02 11:57:54,662 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-02 11:57:54,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:54,662 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-02 11:57:54,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:54,662 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-02 11:57:54,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:54,662 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:54,662 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-02 11:57:54,663 INFO L423 AbstractCegarLoop]: === Iteration 376 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:54,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:54,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1124456000, now seen corresponding path program 360 times [2018-10-02 11:57:54,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:54,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:54,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:54,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:54,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:54,729 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:54,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:54,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:54,736 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:57:54,749 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-02 11:57:54,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:54,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:54,775 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:54,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:54,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:54,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:54,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:54,776 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-02 11:57:55,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:55,359 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:57:55,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:55,359 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:55,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:55,360 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:57:55,360 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:57:55,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:55,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:57:55,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-10-02 11:57:55,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:55,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:57:55,799 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:57:55,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:55,799 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:57:55,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:55,799 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:57:55,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:55,799 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:55,799 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:57:55,799 INFO L423 AbstractCegarLoop]: === Iteration 377 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:55,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:55,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1124457922, now seen corresponding path program 361 times [2018-10-02 11:57:55,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:55,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:55,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:55,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:55,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:55,871 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:55,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:55,872 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:55,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:55,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:55,888 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:55,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:55,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:55,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:55,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:55,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:55,909 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:57:56,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:56,491 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-02 11:57:56,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:56,491 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:56,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:56,492 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:57:56,492 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:57:56,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:56,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:57:56,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-10-02 11:57:56,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:57:56,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:57:56,918 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:57:56,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:56,918 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:57:56,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:56,918 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:57:56,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:56,919 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:56,919 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:57:56,919 INFO L423 AbstractCegarLoop]: === Iteration 378 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:56,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:56,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1126303042, now seen corresponding path program 362 times [2018-10-02 11:57:56,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:56,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:56,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:56,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:56,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:56,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:56,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:56,989 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:56,997 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:57:57,004 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:57:57,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:57,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:57,007 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:57,027 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:57,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:57,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:57,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:57,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:57,028 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:57:57,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:57,716 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-02 11:57:57,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:57,716 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:57,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:57,716 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:57:57,717 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:57:57,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:57,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:57:58,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-10-02 11:57:58,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:58,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:57:58,168 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:57:58,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:58,168 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:57:58,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:58,168 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:57:58,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:58,169 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:58,169 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:57:58,169 INFO L423 AbstractCegarLoop]: === Iteration 379 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:58,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:58,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1126304964, now seen corresponding path program 363 times [2018-10-02 11:57:58,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:58,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:58,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:58,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:58,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:58,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:58,263 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:58,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:58,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:58,270 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:57:58,282 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:57:58,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:58,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:58,306 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:58,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:58,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:58,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:58,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:58,307 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:57:58,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:58,889 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-02 11:57:58,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:58,889 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:58,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:58,890 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:57:58,890 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:57:58,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:58,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:57:59,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-02 11:57:59,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:57:59,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-02 11:57:59,288 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-02 11:57:59,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:59,288 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-02 11:57:59,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:59,288 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-02 11:57:59,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:59,288 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:59,288 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-02 11:57:59,288 INFO L423 AbstractCegarLoop]: === Iteration 380 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:59,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:59,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1395503934, now seen corresponding path program 364 times [2018-10-02 11:57:59,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:59,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:59,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:59,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:59,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:59,358 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:59,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:59,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:59,365 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:57:59,373 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:57:59,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:59,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:59,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:59,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:59,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:59,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:59,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:59,397 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-02 11:57:59,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:59,940 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:57:59,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:59,940 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:57:59,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:59,941 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:57:59,941 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:57:59,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:59,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:58:00,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2018-10-02 11:58:00,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:58:00,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:58:00,388 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:58:00,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:00,389 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:58:00,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:58:00,389 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:58:00,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:58:00,389 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:00,389 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:58:00,389 INFO L423 AbstractCegarLoop]: === Iteration 381 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:00,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:00,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1395502012, now seen corresponding path program 365 times [2018-10-02 11:58:00,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:00,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:00,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:00,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:00,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:00,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:00,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:00,464 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:58:00,477 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-02 11:58:00,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:00,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:00,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:00,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:58:00,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:58:00,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:58:00,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:58:00,501 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:58:01,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:01,041 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-02 11:58:01,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:58:01,041 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:58:01,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:01,042 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:58:01,042 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:58:01,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:58:01,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:58:01,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-10-02 11:58:01,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:58:01,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-02 11:58:01,469 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-02 11:58:01,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:01,469 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-02 11:58:01,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:58:01,469 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-02 11:58:01,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:58:01,469 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:01,470 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:58:01,470 INFO L423 AbstractCegarLoop]: === Iteration 382 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:01,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:01,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1393656892, now seen corresponding path program 366 times [2018-10-02 11:58:01,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:01,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:01,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:01,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:01,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:01,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:01,536 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:01,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:01,537 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:01,544 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:58:01,554 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-02 11:58:01,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:01,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:01,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:01,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:58:01,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:58:01,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:58:01,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:58:01,578 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-02 11:58:02,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:02,113 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-02 11:58:02,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:58:02,113 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:58:02,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:02,113 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:58:02,113 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:58:02,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:58:02,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:58:02,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-10-02 11:58:02,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:58:02,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-02 11:58:02,539 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-02 11:58:02,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:02,539 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-02 11:58:02,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:58:02,539 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-02 11:58:02,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:58:02,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:02,540 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-02 11:58:02,540 INFO L423 AbstractCegarLoop]: === Iteration 383 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:02,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:02,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1393654970, now seen corresponding path program 367 times [2018-10-02 11:58:02,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:02,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:02,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:02,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:02,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:02,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:02,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:02,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:58:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:02,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:02,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:02,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:58:02,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:58:02,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:58:02,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:58:02,649 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-02 11:58:03,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:03,149 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2018-10-02 11:58:03,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:58:03,149 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:58:03,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:03,150 INFO L225 Difference]: With dead ends: 38 [2018-10-02 11:58:03,150 INFO L226 Difference]: Without dead ends: 36 [2018-10-02 11:58:03,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:58:03,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-02 11:58:03,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2018-10-02 11:58:03,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:58:03,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-02 11:58:03,436 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 19 [2018-10-02 11:58:03,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:03,436 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-02 11:58:03,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:58:03,436 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-02 11:58:03,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:58:03,437 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:03,437 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-02 11:58:03,437 INFO L423 AbstractCegarLoop]: === Iteration 384 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:03,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:03,437 INFO L82 PathProgramCache]: Analyzing trace with hash 21654842, now seen corresponding path program 368 times [2018-10-02 11:58:03,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:03,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:03,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:03,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:58:03,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:03,517 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:03,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:03,518 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:03,531 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:58:03,537 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:58:03,537 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:03,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:03,540 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:03,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:03,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:58:03,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:58:03,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:58:03,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:58:03,562 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 11 states. [2018-10-02 11:58:04,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:04,695 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-02 11:58:04,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:58:04,695 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-02 11:58:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:04,696 INFO L225 Difference]: With dead ends: 71 [2018-10-02 11:58:04,696 INFO L226 Difference]: Without dead ends: 69 [2018-10-02 11:58:04,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:58:04,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-02 11:58:05,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-10-02 11:58:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-02 11:58:05,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-02 11:58:05,220 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-02 11:58:05,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:05,220 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-02 11:58:05,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:58:05,221 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-02 11:58:05,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:58:05,221 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:05,221 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-02 11:58:05,221 INFO L423 AbstractCegarLoop]: === Iteration 385 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:05,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:05,222 INFO L82 PathProgramCache]: Analyzing trace with hash 21656764, now seen corresponding path program 369 times [2018-10-02 11:58:05,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:05,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:05,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:05,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:05,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:05,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:05,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:05,328 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:58:05,339 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:58:05,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:05,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:05,344 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:05,364 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:05,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:58:05,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:58:05,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:58:05,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:58:05,365 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. Received shutdown request... [2018-10-02 11:58:06,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:58:06,438 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 11:58:06,444 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 11:58:06,444 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 11:58:06 BoogieIcfgContainer [2018-10-02 11:58:06,444 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 11:58:06,445 INFO L168 Benchmark]: Toolchain (without parser) took 260027.03 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -445.1 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 415.1 MB). Peak memory consumption was 129.0 MB. Max. memory is 7.1 GB. [2018-10-02 11:58:06,447 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:58:06,447 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.29 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. [2018-10-02 11:58:06,447 INFO L168 Benchmark]: Boogie Preprocessor took 24.69 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. [2018-10-02 11:58:06,447 INFO L168 Benchmark]: RCFGBuilder took 295.74 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. [2018-10-02 11:58:06,448 INFO L168 Benchmark]: TraceAbstraction took 259659.62 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -445.1 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 394.0 MB). Peak memory consumption was 107.8 MB. Max. memory is 7.1 GB. [2018-10-02 11:58:06,450 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.29 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.69 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 295.74 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 259659.62 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -445.1 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 394.0 MB). Peak memory consumption was 107.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 29]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 29). Cancelled while BasicCegarLoop was constructing difference of abstraction (36states) and FLOYD_HOARE automaton (currently 11 states, 11 states before enhancement), while ReachableStatesComputation was computing reachable states (51 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 259.5s OverallTime, 385 OverallIterations, 8 TraceHistogramMax, 135.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1540 SDtfs, 2965 SDslu, 5291 SDs, 0 SdLazy, 8981 SolverSat, 4984 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 26.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9272 GetRequests, 6309 SyntacticMatches, 0 SemanticMatches, 2963 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=384, 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: 67.9s AutomataMinimizationTime, 384 MinimizatonAttempts, 5705 StatesRemovedByMinimization, 384 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 38.3s InterpolantComputationTime, 12619 NumberOfCodeBlocks, 12619 NumberOfCodeBlocksAsserted, 2182 NumberOfCheckSat, 11850 ConstructedInterpolants, 0 QuantifiedInterpolants, 542280 SizeOfPredicates, 384 NumberOfNonLiveVariables, 16346 ConjunctsInSsa, 3346 ConjunctsInUnsatCore, 769 InterpolantComputations, 1 PerfectInterpolantSequences, 0/36084 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/Luxembourg-sophisticated.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-02_11-58-06-459.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg-sophisticated.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_11-58-06-459.csv Completed graceful shutdown